Effects of Resistance Training on Depression
Overview of Depression
A recent study published in JAMA Psychiatry investigated how resistance training can alleviate symptoms of depression. Depression stands as one of the most prevalent mental health disorders globally, significantly impacting individuals and society. It is recognized as the most costly mental health issue in Europe, with an estimated global economic burden of $118 billion annually. However, these figures only partially reflect the personal struggles faced by those suffering from the disorder. Additionally, depression is often linked with other health complications, including cardiovascular disease and increased mortality rates.
Treatment Challenges
Standard treatments for depression typically include medications, which can be expensive and often do not provide a cure. Psychotherapy, while effective, can also be a lengthy and costly process. Recent criticisms of previous studies suggest the presence of publication bias, which may distort the perceived efficacy of psychotherapy. Given these challenges, there is a pressing need for alternative or supplementary treatment options. Individuals dealing with depression may benefit from a combination of various therapeutic strategies.
Role of Exercise
Exercise has long been recognized for its potential to alleviate depressive symptoms and is commonly recommended alongside traditional therapy and medications. However, the specific effects of resistance exercises on depression are not yet fully understood.
Research Findings on Resistance Exercises
An international team of researchers sought to clarify the available data through meta-analysis techniques, reviewing 33 randomized control trials involving 1,877 participants. As reported in JAMA Psychiatry, the researchers identified a medium overall effect size related to resistance training. Notably, this effect did not correlate with the strength gains of the participants, the total amount of exercise, or their initial health status.
These findings are promising for many individuals suffering from depression, suggesting that resistance training can improve symptoms even without requiring significant physical exertion. Many patients report low energy levels, which often hinder their ability to participate in physical activities.
Impact of Depression Severity
One notable factor influencing the results was the severity of depression, with individuals experiencing mild to moderate depression showing greater benefits. This could be attributed to the fact that more severe depression is generally more resistant to treatment. Additionally, shorter exercise sessions were identified as more effective than those exceeding 45 minutes.
The researchers also noted that proper blinding during treatment allocation led to smaller observed effects. Blinding, which involves assigning participants to treatment or control groups without their knowledge, enhances the reliability of trials by reducing bias. Consequently, the criteria for determining positive outcomes are stricter.
Need for Further Research
The researchers concluded that, while resistance exercises offer significant benefits for alleviating depressive symptoms, there is a necessity for more rigorous studies. Future research should employ blinded allocation and assessments and should report detailed data, including session duration, number of sets, and types of exercises. This information will help analyze how exercise intensity affects results.
Reference
Gordon, Brett R., et al. “Association of Efficacy of Resistance Exercise Training With Depressive Symptoms.” JAMA Psychiatry, Sept. 2018, doi:10.1001/jamapsychiatry.2018.0572.