Depression is one of the most common mental health conditions worldwide, affecting mood, energy levels, sleep, concentration and overall quality of life. While antidepressant medications and psychological therapies remain the mainstay of treatment, many patients continue to experience persistent symptoms or relapses.
A randomised controlled trial conducted by Rima Dada, Department of Anatomy, Lab for Molecular Reproduction and Genetics, All India Institute of Medical Sciences (AIIMS), New Delhi, along with Madhuri R. Tolahunasea, Rajesh Sagarb, Muneeb Faiq suggests that a 12 week yoga and meditation based lifestyle intervention may help reduce the severity of depression.
Understanding Neuroplasticity and Depression
Neuroplasticity refers to the brain's ability to adapt, reorganise and form new neural connections throughout life. Growing evidence suggests that impaired neuroplasticity plays an important role in major depressive disorder (MDD), contributing to changes in mood, cognition and emotional regulation.
The AIIMS researchers set out to examine whether yoga could influence this process by measuring several biomarkers associated with neuroplasticity, stress regulation and cellular health.
How the Study Was Conducted
The study involved 58 adults diagnosed with major depressive disorder who were already receiving routine medical treatment. Participants were randomly assigned to either a yoga group or a control group. Those in the intervention arm completed a 12 week yoga and meditation based lifestyle programme that incorporated classical yoga practices, breathing exercises, relaxation techniques and meditation.
Researchers assessed depression severity using the Beck Depression Inventory-II (BDI-II) and analysed a range of blood based biomarkers before and after the intervention. These included brain derived neurotrophic factor (BDNF), a key marker of neuroplasticity, along with indicators of inflammation, stress and cellular ageing.
Marked Reduction in Depression Symptoms
After 12 weeks, participants who practised yoga experienced a significant reduction in depression severity compared with those in the control group. The yoga group also showed a notable increase in BDNF levels, suggesting improved neuroplasticity and brain resilience.
Researchers found that higher BDNF levels were associated with lower depression scores in the yoga group, indicating that improvements in brain adaptability may have contributed to the reduction in symptoms.
Positive Changes in Stress and Inflammation
The study also reported significant improvements in several biological markers linked to stress and mental wellbeing. Participants in the yoga group showed lower levels of cortisol, often referred to as the body's primary stress hormone, and reduced levels of the inflammatory marker IL-6. At the same time, levels of beneficial compounds such as DHEAS and sirtuin-1 increased.
These findings suggest that yoga may help restore healthier communication between the brain and body while reducing the biological effects of chronic stress and inflammation, both of which are known to contribute to depression.
Why the Findings Matter
The researchers concluded that a 12 week yoga and meditation based lifestyle intervention can reduce depression severity while improving multiple biomarkers associated with neuroplasticity, stress regulation and cellular health.
Although the study involved a relatively small number of participants and larger studies are needed, the findings provide further evidence that yoga may serve as a valuable complementary therapy alongside conventional treatment for major depressive disorder. The practice may not only help ease symptoms but also support healthier brain function and overall wellbeing.