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Meditation: An Overview and Analysis

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Aaqib Azeez, Old Dominion University

Abstract

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The literature serves as a historical and scientific overview of meditation. The literature first dives into what the practice is, the history of the practice, and the various forms of meditation. In order to understand the current importance of meditation, the literature reviewed meditation's role in sports and religion (Hinduism, Buddhism, Christianity, Islam, and Judaism). Lastly, we reviewed the positive and negative psychological and psychological effects of meditation and extensively analyzed, critiqued, and weighed in a 2017 study highlighting unwanted side effects that were associated with meditation.

Introduction

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A group of individuals meditate together near a beachfront in Singapore. December 2020.

Meditation is a "mindfulness" technique, where an individual trains their mind to focus on the present moment. This focus may be tailored to the individual's breath, surrounding environment, or artificial audio. Meditation can be practiced as an act of worship, mindfulness, or stress relief. On the left, Figure 1 displays a morning exercise group participating in meditation in Singapore.

History

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The word "meditate" comes from the Latin word meditatum ("to ponder"). The French monk Guigo II was the first one to use the term "meditatum" in the 12th century AD[1].

The art of meditation has been practiced for centuries but was originally established in India. It is believed that the followers of Vedanta, a school of Hindu philosophy, were the first documented case of worshippers practicing meditation in about 1500 BCE. Towards the end of the BCE era, meditation was found in various Indian Buddhist & Chinese Taoist philosophies. Siddhartha Gautama, a spiritual leader born in modern-day Nepal, preached Buddhism, a philosophy encouraging several prominent elements of "enlightenment" through meditation. The Tao Te Ching, a Taoist philosophical text authored by Laozi around 400 BC, commands its readers to "become totally empty", "quiet the restlessness of the mind", and "be still". Laozi affirms that such a practice would "bring[s] enlightenment"[2].

Through the Silk Road, Western cultures were exposed to the concept of meditation. Records indicate that meditation was integrated in the Jewish religion, but not so much in Christianity. The Sefer Yetzirah, one of the earliest Kabbalist texts in Judaism, mentions meditation as a way of "consciously building up a deep sense of your place in relation to the dimensions"[3]. As time went on, meditation continued to be incorporated in the daily lives of various cultures throughout the Asian continent.

Vivekananda is well known for his speech in the 1893 World's Parliament of Religions convention, where he spoke of Hinduism & religious tolerance[4].

Meditation was introduced in the United States through two prominent Hindu monks, Swami Vivekananda (depicted in Figure 2) & Paramahansa Yogananda. Both monks performed tours across the US, preaching to the Americans about the teachings of Hinduism.

The shift in belief that meditation was solely a spiritual practice to a practice that has scientific backing began in the mid-1900s. Starting with clinical studies, meditation opened up the scientific field of neuroscience. In 2004, a study conducted on Tibetan meditators revealed that meditation had positive effects on neural plasticity[5].

In today's world, meditation is widely known and is practiced by people all around the world.

Forms of Meditation

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According to a WebMD.com article (proof-checked by Dan Brennan, MD), the practice of meditation can be broken down into the following: guided meditation, mindfulness meditation, focused meditation, heart-centered meditation & movement meditation[6].

Guided meditation is where the meditator follows a step-by-step guide led by a teacher or instructor.

Mindfulness meditation is when the meditator focuses solely on their breath. According to New York Times writer David Gelles, the purpose of mindfulness meditation is to center one's focus on the "present moment" and not necessarily to "empty" one's mind[7]. Figure 3 illustrates a man focusing on his breath as mindfulness meditation entails.

An Indian man meditating near the Ganges River.

Focused meditation, also known as "focused attention meditation" (FAM)[8], centers one's focus on an external element. An example of an external element may be a candle flame or a chant[8]. An example of a focused meditation is a "body scan meditation", where meditators "visualize" parts of their body (starting from the toes to the head). This is preferable for meditators who have trouble focusing on their breath during mindfulness meditation. According to a 2012 study conducted by Wendy Hasenkamp, FAM can improve one's stamina in focusing on one object - though it is not clear if this is specific to FAM or meditation itself[9]. The opposite of focused meditation is open-minded meditation (OM), where the meditator opens his awareness to his surroundings. The "focus" in OM meditation is "awareness itself"[10].

Heart-centered motivation or loving-kindness meditation (LKM[10]) is a form of meditation that is tailored to one's emotions rather than one's mind. One focuses on developing feelings of "self-love". Once the meditator achieves "self-love", they may engage their love to things that the meditator disfavors.

Movement meditation is a great way of meditation for those who have trouble remaining still for elongated periods. Some excerises mentioned in the WebMD.com article include yoga, tai chi and even everyday activities - such as gardening and cooking[6].

Meditation in Sports

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Mindfulness has proven to positively affect athletic performances as it can reduce stress (through reduced salivary cortisol levels[11]), increase concentration levels, and further advance cognitive functions needed to perform (such as the ability to remove distractions)[11][12].

Kobe Bryant spoke about meditation and the positive effects that the practice had on his life & his sports performance.

Meditation increases an athlete's chances of entering into a state of flow (or the zone[13]), the ability to be entirely synchronized with their performance[14]. American golfer Mark Calcavecchia explains that during his state of flow, he "[doesn't] think about the shot, or the wind, or the distance, or the gallery, or anything. [He] just pull[s] a club and swing[s].”[15].

Kobe Bryant, regarded as one of the greatest American basketball players of all time, said that he "meditate[d] every day... as that prepares me to face whatever comes next"[16]. Bryant felt as if he was "constantly chasing the day" if he skipped out on his habitual meditation practice[17].

A study conducted by Baltzell et al., (2014) assigned 7 Division 1 female footballers through a "mindfulness meditation training session" (MMTS) program. The program lasted 6 weeks and totaled 12 overall sessions. After the MMTS program, the D1 athletes were interviewed on the impact meditation had on their performance. All athletes reported that the MMTS program was the reason for their "positive [..] mental shift" on the field[18]. Similar results were found in a 2016 study, where 10 basketball players were evenly separated into two groups: a group that meditates and a group that does not meditate. The basketball players that meditated found that they became stress-free and less prone to anger or fear during performance[19].

Meditation in Religion

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The practice of meditation can be found throughout the major religions of our time (Hinduism, Buddhism, Islam, Christianity & Judaism). Although it varies based on faith, meditation in religion generally consists of undivided attention on the worship of a supreme deity(s) and to bring the worshipper spiritually closer to said deity. Alongside meditation, being religious is associated with many health benefits. This includes increased longevity, reduced risk of heart diseases, lower blood pressure, and increased immune functionality[20][21].

Hinduism

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Elements of meditative practices are mostly in the form of yoga. In a religious context, yoga are spiritual practices with the aim of "leading to [a] union [to become Brahman]"[22]. Meditation and yoga are not regarded as synonymous but are somewhat intertwined and meditation can be considered as a "part of yoga lifestyle"[23]. The ultimate goal of both yoga & meditation is to bring a "peace of mind"[23].

Yoga originated in India and has been practiced worldwide for centuries.

Yoga

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A bhakti yogi practicing meditation

The Sanskrit word for "yoga" derives from the root word yuj (युज्), meaning "to tie together". Yoga philosophy is considered to be one of the six orthodox (āstika) schools of Hinduism. There are four schools of yoga--all practiced in a process to attain moksha (liberation) & self-realization[24].

  • Jnana yoga - The yogi aims to understand the insight of his Atman (soul) vs. the Brahman, usually with the help of a guru. Jnana yoga consists of three parts: 1) knowledge in the Hinduistic scriptures (Vedas & Upanishads) 2) reflection (active awareness) 3) meditation in which one "detaches" himself from "our roles with ourselves".
  • Bhakti yoga - The yogi dedicates love to a personal deity. The diety in question may be Shiva, Krishna or even Jesus Christ. Figure 4 displays a bhakti yogi practicing meditation in front of a body of water.
  • Karma yoga - "Karma" is referred to as the "selfless service towards others"[24]. This type of yoga can be practiced with jnana or bhakti yoga. The main principle of this yoga is to act without any expectations or thoughts about the results of one's tasks. For example, a hunter should not attach himself to the accuracy of his shot, but towards the practice of shooting. As quoted in the Bhagavad Gita: "To the work you have the right, but not to the fruits thereof". One's undivided focus for each task should be calmy geared towards the task itself in order to avoid suffering. This type of yoga is believed to "purify the mind", an outcome identical with meditation[22][24].
  • Raja yoga - The yogi is able to find spiritual, mental & physical peace by emphasizing control over the mind and body. This type of yoga focuses on meditation in order to control and calm the mind.

Dhyana (ध्यान, "meditation" in English) is the 7th limb of Ashtanga yoga, a classification of yoga created by ancient Hindu philosopher Patanjali. Dhyana consists of mental training practices involving posture, breath/sense control, and increased concentration. The yogi's final stage is jhana, where the yogi is completely engaged in meditation--to the point that the yogi "can no longer separate the self from it [the practice]"[25].

Buddhism

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As mentioned earlier, Guatama revered meditation as a significant practice in his faith. The Sanskrit word भावना (bhavana) is coined for meditative practices (translating into English as "mental cultivation[26]"). In Theravada Buddhism, Buddhism's oldest school, the Pali Canon mentions two crucial parts of meditation.

  • Shamatha (Sinhala: සමථ, concentration) emphasizes complete focus on a specific object, such as a candle or chant.
  • Vipassana (Sinhala: විදර්ශනා, insight) meditation is where the meditator "chip[s] away" distractions in order to achieve "liberation", a "presence of light" and the "goal of all Buddhist practices".[26]

Buddhism practices meditation similar to Hinduism.

Islam

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An Algerian painting of a Sufi engaging in muraqabah.

Meditation is a broad term and various sources provide differing explanations of meditation's place in Islam.

According to Sunni scholar Nabeel Valli, under the approval of Ebrahim Desai, "meditation" is translated into Arabic as muraqabah (Arabic: مراقبة). Muraqabah is a practice aimed at strengthening one's relationship with Allah (Arabic: ٱللَّٰه God in Islam). This is done by clearing one's mind of everything except Allah and practicing "silent dhikr (mention)".[27] Valli uses Chapter 13, verse 28 of the Qur'an to support his position (showcased below).

الَّذِينَ آمَنُوا وَتَطْمَئِنُّ قُلُوبُهُم بِذِكْرِ اللَّهِ ۗ أَلَا بِذِكْرِ اللَّهِ تَطْمَئِنُّ الْقُلُوبُ

Those who have believed and whose hearts are assured by the remembrance of Allah. Unquestionably, by the remembrance of Allah hearts are assured.[28]

However, Valli makes it clear that meditations resembling Hinduistic (yoga, for example) or Buddhist meditations are impermissible and go against the shariah (religious law).

In the Sufi sect, the Sufis extend muraqabah even further with unique stages - although mainstream Islamic scholars, including Shaykh al-Islam, condemned Sufis for their "innovations that constitute shirk (associating partners with Allah)"[29]. Figure 5 displays a painting of a Sufi engaging in muraqabah.

Christianity

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An August 2022 article by members of the College of Theology of Grand Canyon University, titled Theology Thursday: A Christian Perspective on Meditation, explores meditation within the Christian realm. Michele Pasley and Todd Forrest differentiate between "eastern" (or secular) meditation and Christian meditation, stating that the former is about "detach[ing]" from one's self, whilst the latter is "attach[ing]" one's self to "God and being focused on his words".[30] Pasley and Forrest claim that Christian meditation allows the worshipper to be full of the "fruit of the Spirit", allowing them to be more "patient", albeit evidence for this claim was not provided.[30]

Pasley and Forrest quote several places in the Bible where meditation is mentioned or encouraged to its believers.

  • Psalm 1 describes "meditating" on God's words would lead to a life of success. This is because being "fruitful" (Gen. 1:28[31]) was God's first commandment to his creation. This is achieved by the believer being "supplied" the words of God, therefore akin to a tree that is fruit bearing (a tree contains its fruits from an abundance of water).[32]
  • Hebrews 3:1[33] and Hebrews 12:2[34] both allude to the believers to fixate their mind and attention on Jesus, to which Pasley and Forrest claim these passages command the believer to meditate on God.

In the end, the pair recommend readers to "be with Jesus" and to engage their focus on the scripture.[30]

Judaism

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Nissan Dovid Dubov, a director of a Chabad-Lavitch in the UK, highlights the ignorance of many Jews on the practice of Jewish meditation, despite it being a crucial part of the Jewish religion. According to Dubov, six of the 613 mitzvot (commandments) in the Torah are connected to the principle of meditation: deep & intentional thinking. These are to believe in God, to unify His name, to love God, to fear Him, to love a fellow Jew, and to not turn astray after one's heart and eyes.

Jews engaging in amidah, a form of Jewish prayer. Worshippers are engaging in deep contemplation over the words and commandments of God.

When a Jew proclaims his daily recitation twice a day: "Hear O Israel, the L-rd our G‑d, the L-rd is One", one must not recite out of mindless habit, but this recitation must be accompanied by "deep contemplation"[35]. This deep meditation would arouse feelings of love and fear for God.

To "love God" and to "fear Him" go hand in hand. The believer, out of his deep love for God, would keep strong to the commandments. To fear God (word used is yirah, יראה) is to avoid sin due to a fear of the punishment for committing such sin, but the root cause of the fear is deep admiration of the Lord and to not "contradict" the Divine Will[35].

To love a fellow Jew comes from Rabbi Yisrael ben Eliezer: "the portal to G‑d is the love of a fellow Jew". Deep contemplation of the "G-dly essence" of every Jew leads to a love for that fellow believer[35].

Lastly, the daily prayers serve as a strategy to implement religious meditation. The prayer consists of two parts: deep meditation on one's "attach[ment]" of their soul to God & actively nourishing one's soul to "refine one's character". Dubov credits meditation as a way of "carry[ing] these words [amidah, shown in Figure 6], their meaning[s], into our daily lives when we engage in the day-to-day activities that can sometimes seem far from obvious G‑dliness". Dubov ends off his article with encouraging the believer to exert tunnel-focus in their meditation, as a more "detailed" meditation brings about a stronger effect.[35]

The Sefer Yetzirah, mentioned earlier in this article, is regarded as a "meditation manual" - according to Grand Master Julie Scott[36].

Effects of Meditation

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Positive Effects

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An original research paper conducted in 2019 reports that "hundreds" of scientific literature assert the positive effects on medical conditions and the physiological well-being[37]. According to a 2015 study done by Hari Sharma from the College of Medicine of Ohio State University, meditation is proven to reduce stress, increase memory and reduce depression. Alongside the psychological benefits, the physiological benefits include an increased blood flow to the brain and decreased blood pressure.[38]

In a 2019 case study completed by scientists in China, 40 healthy individuals were placed in two, 8-week "mindfulness training program(s)". The two programs taught two different types of meditation: FAM meditation and OM meditation. 4 individuals failed to complete the training. The 36 individuals who completed the training exhibited positive changes in regulating mood and depression[39].

Mograbi GJ, a professor of Philosophy of Science at Federal University of Mato Grosso, concluded in his 2011 study, Meditation and the Brain: Attention, Control and Emotion, that meditation is a form of "self-control" & very well can contribute to a "better quality of life"[40].

Negative Effects

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Although meditation is a realistic psychological treatment to mood problems & depression levels, it is not recommended for people who suffer with psychiatric issues as it may heighten psychosis[41].

This was suggested from a 1975 case study where a 39-year-old woman experienced "altered reality testing and behavior" after an extended period of time practicing transcendental meditation (a form of focused meditation)[42]. Associated undesirable effects of meditation include anxiety, hallucinations, emotional stress & general confusion[41]. The lack of clarity on what the adverse effects of meditation actually result in is due to the vagueness of what constitutes as an "adverse" effect. An "adverse" reaction to meditation is "highly subjective", according to a 2021 article from Brown University conducted by Dr. Willoughby Britton[43][44]. Dr. Britton further explains that "re-living of a previous trauma may be healing for some and destabilizing for others", hence one meditator's "re-living of [sic] previous trauma" may be a beneficial thing as opposed to another meditator who may find it traumatizing. Britton also mentions that the lack of reported, unwanted effects of meditation may be incorrectly interpreted as an absence of adverse effects.

Dr. Britton conducted a study to explore the adverse effects of meditation programs. Out of 96 participants, 58% of the participants experienced "at least one meditation-related adverse effect", which were symptoms largely in relation to "dysregulated arousal". Participants reported re-experiencing past traumas and having nightmares. Dr. Britton remarks that focus should be planted on the "impact" of the effect and not the "valence" of it. Britton states that feeling "emotionally-checked out... can provide some relief, especially for a person suffering from intense anxiety". 6% of participants reported "impairments in functioning lasting more than one month", which may serve as a sign that disassociation is harmful in those specific cases. Dr. Britton concludes that her study aims to heighten "harms-monitoring in order to maximize the safety and efficacy of mindfulness-based meditation"[44].

Cebolla et al., 2017

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A multilingual 2013 survey was published by a group of researchers from the University of Valencia inviting participants to explore the "unwanted effects" of meditation. The survey was advertised on websites relating to meditation, such as meditation associations. The participants were chosen to be analyzed based on their accurate completion of the survey and their time of meditation practicing (participants who had not meditated for more than two months were not considered in the final analysis). From 914 total people who accessed the survey, n = 509 were excluded due to improper completion of the survey, and n = 57 were excluded due to a lack of meditation experience, leaving only n = 342 participants to assess. The survey was available in Portuguese, Spanish, and English.

Participants were asked about their sociodemographic data (age, race, ethnicity, etc.), medical history (anxiety or depression), type of meditation practice, frequency and time of meditation experience, method of learning (self-taught vs. classes), and mentorship (religious context). Participants were then required to detail if they had any adverse side effects as a result of their meditation experience ("yes" or "no"). If the participant answered "yes", participants detailed the side effect, the context of when said side effect took place, form of meditation practice, and time length (Cebolla et. al., 2017[45]).

At the end of the survey, participants completed a "checklist" of 18 possible experiences that may be experienced from meditation (ranging from "less motivation in life" to "feelings of alienation"). The scientists derived this checklist from German psychiatrist Micheal Landen[46]. Responses for this checklist were on a scale of 0-10, "0" being "never" and "10" being "frequently" (Cebolla et. al., 2017[45]).

Results
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The majority of participants who were accounted for in this study were women (68.4% vs. 31.6% [men]), Spanish (42.9%), married (48.5%), and/or had at least the equivalence to a university-level education (54.4%, with 33.3% being individuals who held a masters or a Ph.D.). Throughout the types of meditation practiced, 46.8% of participants practiced informal practice meditation on a daily basis (integrating thoughtfulness and concentration into daily activities, such as walking).

When participants were asked if they incurred unwanted side effects, 25.4% of the participants selected "yes". 41.3% of these participants answered that unwanted effects occurred during individual meditation (as opposed to a group or a retreat), 8% of the participants were practicing body scan meditation (focusing on sensations that are felt throughout the body) and 10.3% of these meditators practiced 21+ minute sessions. Table 1 below lists the symptoms experienced by meditators who answered "yes" to incurring unwanted side effects whilst practicing meditation.

Table 1

Symptoms experienced whilst meditating (n, %)
Anxiety Pain Depersonalization/derealisation Hypomania/depressive Emotional lability Visual focalization problems Loss of consciousness/dizziness Other symptoms No information
n 12 5 8 2 2 2 6 4 46
% 13.8 5.7 9.2 2.3 2.3 2.3 6.9 4.5 52.8

39% of these symptoms were transitory (vs. 10.3% who reported side effects to be continuous), 37.9% did not need to discontinue medication (as opposed to the 1.1% who discontinued medication due to side effects), whilst 44.8% did not need assistance from a therapist or medical facility (as opposed to the 5.7% who reported that medical assistance was necessary).

A one-way ANOVA on ranks test was implemented to observe the differences between the side effects vs. frequency/years of practice. The scientists found a significant difference between side effects and body awareness meditation (X2 = 5.335; p < .05) (Cebolla et. al., 2017[45]). Body awareness meditation is a form of focused meditation, where the meditator focuses on their body parts. No significant differences were found for the years of practice.

Further analysis was completed on the checklist of 18 possible side effects from meditation in relation to learning styles. A univariate ANOVA test was conducted on the checklist and found two significant differences. Significant differences were found in feelings of "increased emotional pain" [F(3,227) = 2.908; p <.05; η2 = .037] and "need to prolong meditation" [F(3,225) = 2.793; p <.05; η2 = .036] (Cebolla et. al., 2017[45]).

Limitations
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Mahasti meditation, a form of body-awareness meditation in Buddhism. This type of meditation was found to be associated with the least amount of side effects in the study.


The researchers concluded that although there was a decent number of reports for side effects (25.4% of the respondents reported side effects), almost half of the participants that attempted to answer the questionnaire regarding side effects did not fill out the questionnaire adequately - thus losing more data.

The data that was adequate and studied found that the side effects reported were mostly insignificant and didn't cause lasting problems in the meditators. Side effects were found more in individual meditation vs. group meditation and in longer meditation sessions vs. shorter meditation sessions. Focused-attention meditation (FA meditation) was found to bring about more side effects while body-awareness meditation brought out fewer side effects (Cebolla et al., 2017[45]). FA meditation was found to be mostly associated with greater "self-criticism", or a belief that time not spent meditating was "wasted". The researchers explained this correlation by detailing the nature of FA meditation, stating that since FA meditation is "heavily structured" towards a "unique" object of meditation, it may go against the meditator's "experience" (Cebolla et. al., 2017[45]).

The researchers acknowledge that correlation does not imply causation & although unwanted side effects could be associated with meditation, no definitive evidence has been shown to directly attribute meditation to any unwanted side effects. The researchers highlight various significant limitations the study suffered from, including cultural imbalance (the majority of participants hailing from Spanish or Latina America), obvious bias (biases typically associated with surveys), and the lack of proper responses.

Conclusion

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After reviewing the history & religious practices involving meditation, it is evident that meditation has played a significant part in peoples' lives for centuries. With various techniques, those who choose to meditate, despite whatever form of meditation it is, reap several neurological and health benefits. Although meditation has been mostly painted with a positive brush, the idea of meditation bringing out unwanted effects has been researched. Although Dr. Britton's study found over 50% of her participants to have experienced one or more unwanted effects, it seems to be a case-by-case basis and is up to the interpretation of the meditator themselves.

In a 2017 study done by a group of researchers of the University of Valencia, their survey ultimately found that 25.4% of participants suffered unwanted side effects of meditation. These effects ranged from self-criticism to greater emotional pain. A significant difference was found between unwanted side effects and body-awareness meditation. Albeit the study brought greater attention to potential negative experiences of meditation, the study fell to many limitations - including bias and a significant amount of data lost in the process. Nonetheless, the researchers recommended that meditation should not be practiced by those with psychotic issues.

Overall, the literature reviewed has shown that meditation is an ancient practice that has fully merited its praise and longevity. The use of meditation has been positively observed throughout many different fields - from religion to sports.

Acknowledgements

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No thanks given.

Competing interests

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The author declares that they have no competing interests.

Ethics statement

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This paper does not serve as medical advice.

References

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  1. ↑ "Meditation History". News-Medical.net. 2010-05-18. Retrieved 2022-10-06.
  2. ↑ "Laozi – "His mind becomes as vast and immeasurable as the night sky" | Transcendental Meditation® Blog". Retrieved 2022-12-15.
  3. ↑ "BBC - Religions - Judaism: The essence of Jewish meditation". www.bbc.co.uk. Retrieved 2022-10-06.
  4. ↑ "Swami Vivekananda and His 1893 Speech". The Art Institute of Chicago. Retrieved 2022-12-15.
  5. ↑ Lutz, Antoine; Greischar, Lawrence L.; Rawlings, Nancy B.; Ricard, Matthieu; Davidson, Richard J. (2004-11-16). "Long-term meditators self-induce high-amplitude gamma synchrony during mental practice". Proceedings of the National Academy of Sciences of the United States of America 101 (46): 16369–16373. doi:10.1073/pnas.0407401101. ISSN 0027-8424. PMID 15534199. https://pubmed.ncbi.nlm.nih.gov/15534199/. 
  6. ↑ 6.0 6.1 "What Are the Different Types of Meditation?". WebMD. Retrieved 2022-12-20.
  7. ↑ Gelles, David. "How to Meditate". www.nytimes.com. New York Times. Retrieved 2022-12-20.
  8. ↑ 8.0 8.1 Lippelt, Dominique P.; Hommel, Bernhard; Colzato, Lorenza S. (2014). "Focused attention, open monitoring and loving kindness meditation: effects on attention, conflict monitoring, and creativity – A review". Frontiers in Psychology 5. doi:10.3389/fpsyg.2014.01083. ISSN 1664-1078. PMID 25295025. PMC PMC4171985. https://www.frontiersin.org/articles/10.3389/fpsyg.2014.01083. 
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  11. ↑ 11.0 11.1 Nien, Jui-Ti; Wu, Chih-Han; Yang, Kao-Teng; Cho, Yu-Min; Chu, Chien-Heng; Chang, Yu-Kai; Zhou, Chenglin (2020-08-28). "Mindfulness Training Enhances Endurance Performance and Executive Functions in Athletes: An Event-Related Potential Study". Neural Plasticity 2020: 1–12. doi:10.1155/2020/8213710. ISSN 2090-5904. PMID 32908483. PMC PMC7474752. https://www.hindawi.com/journals/np/2020/8213710/. 
  12. ↑ Colzato, Lorenza S.; Kibele, Armin (2017-06-01). "How Different Types of Meditation Can Enhance Athletic Performance Depending on the Specific Sport Skills". Journal of Cognitive Enhancement 1 (2): 122–126. doi:10.1007/s41465-017-0018-3. ISSN 2509-3304. https://doi.org/10.1007/s41465-017-0018-3. 
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  14. ↑ MA, Phil Del Vecchio III (2010-10-01). "How to achieve the "Flow State" in Athletics and Life". Podium Sports Journal. Retrieved 2023-01-01.
  15. ↑ Deporte, Ertheo Educacion & (2019-01-31). "Mindfulness Meditation for Athletes | How to Get in the Zone". Soccer summer camps and academies all over the world. Retrieved 2023-01-01.
  16. ↑ "More Sports: Mindfulness: the secret weapon of Michael Jordan and Kobe Bryant". MARCA in English. 2018-08-08. Retrieved 2023-01-01.
  17. ↑ Singh, Mahendra Pratap (2021-11-01). ""I always had a hard time sleeping, I couldn't figure out how to shut my brain off": Kobe Bryant advises people to take 30 extra minutes of night-time sleep". The SportsRush. Retrieved 2023-01-01.
  18. ↑ "Mindfulness Meditation Training for Sport (MMTS) intervention: Impact of MMTS with Division I female athletes | Association for Contextual Behavioral Science". contextualscience.org. Retrieved 2023-07-19.
  19. ↑ Burns, Janet M. C.. 2016. "Getting to Another Level: Why Basketball Players Use Mindfulness Meditation." The International Journal of Health, Wellness, and Society 6 (4): 81-95. doi:10.18848/2156-8960/CGP/v06i04/81-95.
  20. ↑ "Community-Based Participatory Research Studies in Faith-Based Settings". academic.oup.com. Retrieved 2023-07-20.
  21. ↑ Oman, D., & Thoresen, C. E. (2005). Do Religion and Spirituality Influence Health? In R. F. Paloutzian & C. L. Park (Eds.), Handbook of the psychology of religion and spirituality (pp. 435–459). The Guilford Press.
  22. ↑ 22.0 22.1 "Hinduism: Forms of Yoga". philosophy.lander.edu. Retrieved 2023-02-15.
  23. ↑ 23.0 23.1 Mike, Author Gita (2021-06-07). "Yoga and Meditation: The Differences". Yogigo. Retrieved 2023-02-15. {{cite web}}: |first= has generic name (help)
  24. ↑ 24.0 24.1 24.2 "What is Karma Yoga? - Definition from Yogapedia". Yogapedia.com. Retrieved 2023-02-15.
  25. ↑ "What is Dhyana? - Definition from Yogapedia". Yogapedia.com. Retrieved 2023-01-20.
  26. ↑ 26.0 26.1 Gunaratana, Bhante Henepola. "What Exactly Is Vipassana Meditation?". Tricycle: The Buddhist Review. Retrieved 2023-03-15.
  27. ↑ IslamQA (2014-09-20). "Is meditation permissible?". IslamQA. Retrieved 2023-03-16.
  28. ↑ "Those who have believed and whose hearts are assured by the remembrance | surah Raad aya 28". surahquran.com. Retrieved 2023-03-16.
  29. ↑ "What Is Sufism? - Islam Question & Answer". islamqa.info. Retrieved 2023-07-20.
  30. ↑ 30.0 30.1 30.2 "Theology Thursday: A Christian Perspective on Meditation". GCU. 2022-08-04. Retrieved 2023-05-31.
  31. ↑ "Bible Gateway passage: Genesis 1:28 - New International Version". Bible Gateway. Retrieved 2023-06-27.
  32. ↑ "Psalm 1: Discovering True Happiness". BJUtoday. 2018-01-22. Retrieved 2023-06-27.
  33. ↑ "Bible Gateway passage: Hebrews 3:1 - New International Version". Bible Gateway. Retrieved 2023-06-27.
  34. ↑ "Hebrews 12:2 - Google Search". www.google.com. Retrieved 2023-06-27.
  35. ↑ 35.0 35.1 35.2 35.3 Dubov, N. D. (n.d.). Jewish meditation - chabad.org. Jewish Meditation. https://www.chabad.org/library/article_cdo/aid/361886/jewish/Jewish-Meditation.htm
  36. ↑ Armstrong, Steven. “Three Kabbalistic Meditations from the Sepher Yetzirah - Grand Master Julie Scott.” Rosicrucian Podcasts, 13 Feb. 2023, rosicrucian-podcasts.org/three-kabbalistic-meditations-from-the-sepher-yetzirah-julie-scott-src/.
  37. ↑ Anderson, Thomas; Suresh, Mallika; Farb, Norman AS (2019-06). "Meditation Benefits and Drawbacks: Empirical Codebook and Implications for Teaching". Journal of Cognitive Enhancement 3 (2): 207–220. doi:10.1007/s41465-018-00119-y. ISSN 2509-3290. http://link.springer.com/10.1007/s41465-018-00119-y. 
  38. ↑ Sharma, Hari (2015). "Meditation: Process and effects". AYU (An International Quarterly Journal of Research in Ayurveda) 36 (3): 233. doi:10.4103/0974-8520.182756. ISSN 0974-8520. PMID 27313408. PMC PMC4895748. http://www.ayujournal.org/text.asp?2015/36/3/233/182756. 
  39. ↑ Zhang, Qin; Wang, Zheng; Wang, Xinqiang; Liu, Lei; Zhang, Jing; Zhou, Renlai (2019). "The Effects of Different Stages of Mindfulness Meditation Training on Emotion Regulation". Frontiers in Human Neuroscience 13. doi:10.3389/fnhum.2019.00208. ISSN 1662-5161. PMID 31316361. PMC PMC6610260. https://www.frontiersin.org/articles/10.3389/fnhum.2019.00208. 
  40. ↑ Mograbi, Gabriel JoséCorrêa (2011). "Meditation and the brain: Attention, control and emotionFNx08". Mens Sana Monographs 9 (1): 276. doi:10.4103/0973-1229.77444. ISSN 0973-1229. PMID 21694979. PMC PMC3115297. http://www.msmonographs.org/text.asp?2011/9/1/276/77444. 
  41. ↑ 41.0 41.1 Cebolla, Ausiàs; Demarzo, Marcelo; Martins, Patricia; Soler, Joaquim; Garcia-Campayo, Javier (2017-09-05). Hills, Robert K. ed. "Unwanted effects: Is there a negative side of meditation? A multicentre survey". PLOS ONE 12 (9): e0183137. doi:10.1371/journal.pone.0183137. ISSN 1932-6203. PMID 28873417. PMC PMC5584749. https://dx.plos.org/10.1371/journal.pone.0183137. 
  42. ↑ French, A. P.; Schmid, A. C.; Ingalls, E. (1975-07). "Transcendental meditation, altered reality testing, and behavioral change: a case report". The Journal of Nervous and Mental Disease 161 (1): 55–58. doi:10.1097/00005053-197507000-00007. ISSN 0022-3018. PMID 1151361. https://pubmed.ncbi.nlm.nih.gov/1151361/. 
  43. ↑ "Britton, Willoughby". vivo.brown.edu. Retrieved 2022-12-29.
  44. ↑ 44.0 44.1 "Making mindfulness meditation more helpful starts with understanding how it can be harmful". Brown University. Retrieved 2022-12-29.
  45. ↑ 45.0 45.1 45.2 45.3 45.4 45.5 Cebolla, Ausiàs; Demarzo, Marcelo; Martins, Patricia; Soler, Joaquim; Garcia-Campayo, Javier (2017-09-05). Hills, Robert K. ed. "Unwanted effects: Is there a negative side of meditation? A multicentre survey". PLOS ONE 12 (9): e0183137. doi:10.1371/journal.pone.0183137. ISSN 1932-6203. PMID 28873417. PMC PMC5584749. https://dx.plos.org/10.1371/journal.pone.0183137. 
  46. ↑ Linden, Michael (2013). "How to define, find and classify side effects in psychotherapy: from unwanted events to adverse treatment reactions". Clinical Psychology & Psychotherapy 20 (4): 286–296. doi:10.1002/cpp.1765. ISSN 1099-0879. PMID 22253218. https://pubmed.ncbi.nlm.nih.gov/22253218/. 
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