Benefits of Yoga : Supported by Science
Derived from the Sanskrit word “yuji,” meaning yoke or union, yoga is an ancient practice that brings together mind and body. It incorporates breathing exercises, meditation and poses designed to encourage relaxation and reduce stress.
Practicing yoga is said to come with many benefits for both mental and physical health, though not all of these benefits have been backed by science.
This article from Healthline Media takes a look at evidence-based benefits of yoga.
Can Decrease Stress
Yoga is known for its ability to ease stress and promote relaxation. In fact, multiple studies have shown that it can decrease the secretion of cortisol, the primary stress hormone (2Trusted Source, 3Trusted Source).
One study demonstrated the powerful effect of yoga on stress by following 24 women who perceived themselves as emotionally distressed.
After a three-month yoga program, the women had significantly lower levels of cortisol. They also had lower levels of stress, anxiety, fatigue and depression (4Trusted Source).
Another study of 131 people had similar results, showing that 10 weeks of yoga helped reduce stress and anxiety. It also helped improve quality of life and mental health (5Trusted Source).
When used alone or along with other methods of alleviating stress, such as meditation, yoga can be a powerful way to keep stress in check.
SUMMARY: Studies show that yoga can help ease stress and lower your levels of the stress hormone cortisol.
Many people begin practicing yoga as a way to cope with feelings of anxiety. Interestingly enough, there is quite a bit of research showing that yoga can help reduce anxiety.
In one study, 34 women diagnosed with an anxiety disorder participated in yoga classes twice weekly for two months. At the end of the study, those who practiced yoga had significantly lower levels of anxiety than the control group (6Trusted Source).
Another study followed 64 women with post-traumatic stress disorder (PTSD), which is characterized by severe anxiety and fear following exposure to a traumatic event. After 10 weeks, the women who practiced yoga once weekly had fewer symptoms of PTSD. In fact, 52% of participants no longer met the criteria for PTSD at all (7Trusted Source).
It’s not entirely clear exactly how yoga is able to reduce symptoms of anxiety. However, it emphasizes the importance of being present in the moment and finding a sense of peace, which could help treat anxiety.
SUMMARY: Several studies show that practicing yoga can lead to a decrease in symptoms of anxiety.
May Reduce Inflammation
In addition to improving your mental health, some studies suggest that practicing yoga may reduce inflammation as well. Inflammation is a normal immune response, but chronic inflammation can contribute to the development of pro-inflammatory diseases, such as heart disease, diabetes and cancer (8Trusted Source).
A 2015 study divided 218 participants into two groups: those who practiced yoga regularly and those who didn’t. Both groups then performed moderate and strenuous exercises to induce stress. At the end of the study, the individuals who practiced yoga had lower levels of inflammatory markers than those who didn’t (9Trusted Source).
Similarly, a small 2014 study showed that 12 weeks of yoga reduced inflammatory markers in breast cancer survivors with persistent fatigue (10Trusted Source).
Although more research is needed to confirm the beneficial effects of yoga on inflammation, these findings indicate that it may help protect against certain diseases caused by chronic inflammation.
SUMMARY: Some studies show that yoga may reduce inflammatory markers in the body and help prevent pro-inflammatory diseases.
Could Improve Heart Health
From pumping blood throughout the body to supplying tissues with important nutrients, the health of your heart is an essential component of overall health.
Studies show that yoga may help improve heart health and reduce several risk factors for heart disease.
One study found that participants over 40 years of age who practiced yoga for five years had a lower blood pressure and pulse rate than those who didn’t (11Trusted Source).
High blood pressure is one of the major causes of heart problems, such as heart attacks and stroke. Lowering your blood pressure can help reduce the risk of these problems (12Trusted Source).
Some research also suggests that incorporating yoga into a healthy lifestyle could help slow the progression of heart disease.
A study followed 113 patients with heart disease, looking at the effects of a lifestyle change that included one year of yoga training combined with dietary modifications and stress management.
Participants saw a 23% decrease in total cholesterol and a 26% reduction in “bad” LDL cholesterol. Additionally, the progression of heart disease stopped in 47% of patients (13Trusted Source).
It’s unclear how much of a role yoga may have had versus other factors like diet. Yet it can minimize stress, one of the major contributors to heart disease (14Trusted Source).
SUMMARY: Alone or in combination with a healthy lifestyle, yoga may help decrease risk factors for heart disease.
Improves Quality of Life
Yoga is becoming increasingly common as an adjunct therapy to improve quality of life for many individuals.
In one study, 135 seniors were assigned to either six months of yoga, walking or a control group. Practicing yoga significantly improved quality of life, as well as mood and fatigue, compared to the other groups (15Trusted Source).
Other studies have looked at how yoga can improve quality of life and reduce symptoms in patients with cancer.
One study followed women with breast cancer undergoing chemotherapy. Yoga decreased symptoms of chemotherapy, such as nausea and vomiting, while also improving overall quality of life (16Trusted Source).
A similar study looked at how eight weeks of yoga affected women with breast cancer. At the end of the study, the women had less pain and fatigue with improvements in levels of invigoration, acceptance and relaxation (17Trusted Source).
Other studies have found that yoga may help improve sleep quality, enhance spiritual well-being, improve social function and reduce symptoms of anxiety and depression in patients with cancer (18Trusted Source, 19Trusted Source).
SUMMARY: Some studies show that yoga could improve quality of life and may be used as an adjunct therapy for some conditions.
May Fight Depression
Some studies show that yoga may have an anti-depressant effect and could help decrease symptoms of depression.
This may be because yoga is able to decrease levels of cortisol, a stress hormone that influences levels of serotonin, the neurotransmitter often associated with depression (20Trusted Source).
In one study, participants in an alcohol dependence program practiced Sudarshan Kriya, a specific type of yoga that focuses on rhythmic breathing.
After two weeks, participants had fewer symptoms of depression and lower levels of cortisol. They also had lower levels of ACTH, a hormone responsible for stimulating the release of cortisol (2Trusted Source).
Other studies have had similar results, showing an association between practicing yoga and decreased symptoms of depression (21Trusted Source, 22Trusted Source).
Based on these results, yoga may help fight depression, alone or in combination with traditional methods of treatment.
SUMMARY: Several studies have found that yoga may decrease symptoms of depression by influencing the production of stress hormones in the body.
Could Reduce Chronic Pain
Chronic pain is a persistent problem that affects millions of people and has a range of possible causes, from injuries to arthritis.
There is a growing body of research demonstrating that practicing yoga could help reduce many types of chronic pain.
In one study, 42 individuals with carpal tunnel syndrome either received a wrist splint or did yoga for eight weeks.
At the end of the study, yoga was found to be more effective in reducing pain and improving grip strength than wrist splinting (23Trusted Source).
Another study in 2005 showed that yoga could help decrease pain and improve physical function in participants with osteoarthritis of the knees (24Trusted Source).
Although more research is needed, incorporating yoga into your daily routine may be beneficial for those who suffer from chronic pain.
SUMMARY: Yoga may help reduce chronic pain in conditions like carpal tunnel syndrome and osteoarthritis.
Could Promote Sleep Quality
Poor sleep quality has been associated with obesity, high blood pressure and depression, among other disorders (25Trusted Source, 26Trusted Source, 27Trusted Source).
Studies show that incorporating yoga into your routine could help promote better sleep.
In a 2005 study, 69 elderly patients were assigned to either practice yoga, take an herbal preparation or be part of the control group.
The yoga group fell asleep faster, slept longer and felt more well-rested in the morning than the other groups (28Trusted Source).
Another study looked at the effects of yoga on sleep in patients with lymphoma. They found that it decreased sleep disturbances, improved sleep quality and duration and reduced the need for sleep medications (29Trusted Source).
Though the way it works is not clear, yoga has been shown to increase the secretion of melatonin, a hormone that regulates sleep and wakefulness (30Trusted Source).
Yoga also has a significant effect on anxiety, depression, chronic pain and stress — all common contributors to sleep problems.
SUMMARY: Yoga may help enhance sleep quality because of its effects on melatonin and its impact on several common contributors to sleep problems.
Improves Flexibility and Balance
Many people add yoga to their fitness routine to improve flexibility and balance.
There is considerable research that backs this benefit, demonstrating that it can optimize performance through the use of specific poses that target flexibility and balance.
A recent study looked at the impact of 10 weeks of yoga on 26 male college athletes. Doing yoga significantly increased several measures of flexibility and balance, compared to the control group (31Trusted Source).
Another study assigned 66 elderly participants to either practice yoga or calisthenics, a type of body weight exercise.
After one year, total flexibility of the yoga group increased by nearly four times that of the calisthenics group (32Trusted Source).
A 2013 study also found that practicing yoga could help improve balance and mobility in older adults (33Trusted Source).
Practicing just 15–30 minutes of yoga each day could make a big difference for those looking to enhance performance by increasing flexibility and balance.
SUMMARY: Research shows that practicing yoga can help improve balance and increase flexibility.
Could Help Improve Breathing
Pranayama, or yogic breathing, is a practice in yoga that focuses on controlling the breath through breathing exercises and techniques.
Most types of yoga incorporate these breathing exercises, and several studies have found that practicing yoga could help improve breathing.
In one study, 287 college students took a 15-week class where they were taught various yoga poses and breathing exercises. At the end of the study, they had a significant increase in vital capacity (34Trusted Source).
Vital capacity is a measure of the maximum amount of air that can be expelled from the lungs. It is especially important for those with lung disease, heart problems and asthma.
Another study in 2009 found that practicing yogic breathing improved symptoms and lung function in patients with mild-to-moderate asthma (35Trusted Source).
Improving breathing can help build endurance, optimize performance and keep your lungs and heart healthy.
SUMMARY: Yoga incorporates many breathing exercises, which could help improve breathing and lung function.
May Relieve Migraines
Migraines are severe recurring headaches that affect an estimated 1 out of 7 Americans each year (36Trusted Source).
Traditionally, migraines are treated with medications to relieve and manage symptoms.
However, increasing evidence shows that yoga could be a useful adjunct therapy to help reduce migraine frequency.
A 2007 study divided 72 patients with migraines into either a yoga therapy or self-care group for three months. Practicing yoga led to reductions in headache intensity, frequency and pain compared to the self-care group (37Trusted Source).
Another study treated 60 patients with migraines using conventional care with or without yoga. Doing yoga resulted in a greater decrease in headache frequency and intensity than conventional care alone (38Trusted Source).
Researchers suggest that doing yoga may help stimulate the vagus nerve, which has been shown to be effective in relieving migraines (39Trusted Source).
SUMMARY: Studies show that yoga may stimulate the vagus nerve and reduce migraine intensity and frequency, alone or in combination with conventional care.
Promotes Healthy Eating Habits
Mindful eating, also known as intuitive eating, is a concept that encourages being present in the moment while eating.
It’s about paying attention to the taste, smell and texture of your food and noticing any thoughts, feelings or sensations you experience while eating.
This practice has been shown to promote healthy eating habits that help control blood sugar, increase weight loss and treat disordered eating behaviors (40Trusted Source, 41Trusted Source, 42Trusted Source).
Because yoga places a similar emphasis on mindfulness, some studies show that it could be used to encourage healthy eating behaviors.
One study incorporated yoga into an outpatient eating disorder treatment program with 54 patients, finding that yoga helped reduce both eating disorder symptoms and preoccupation with food (43Trusted Source).
Another small study looked at how yoga affected symptoms of binge eating disorder, a disorder characterized by compulsive overeating and a feeling of loss of control.
Yoga was found to cause a decrease in episodes of binge eating, an increase in physical activity and a small decrease in weight (44Trusted Source).
For those with and without disordered eating behaviors, practicing mindfulness through yoga can aid in the development of healthy eating habits.
SUMMARY: Yoga encourages mindfulness, which may be used to help promote mindful eating and healthy eating habits.
Can Increase Strength
In addition to improving flexibility, yoga is a great addition to an exercise routine for its strength-building benefits.
In fact, there are specific poses in yoga that are designed to increase strength and build muscle.
In one study, 79 adults performed 24 cycles of sun salutations — a series of foundational poses often used as a warm-up — six days a week for 24 weeks.
They experienced a significant increase in upper body strength, endurance and weight loss. Women had a decrease in body fat percentage, as well (45Trusted Source).
A 2015 study had similar findings, showing that 12 weeks of practice led to improvements in endurance, strength and flexibility in 173 participants (46Trusted Source).
Based on these findings, practicing yoga can be an effective way to boost strength and endurance, especially when used in combination with a regular exercise routine.