Exercise could play a far more prominent role in the treatment of depression than previously assumed, according to a major updated review that brings together decades of research.

The findings suggest that structured physical activity can reduce depressive symptoms to a degree comparable with established psychological therapies, while also showing similar effects to antidepressant medication, although with less certainty.

At a time when depression remains one of the most significant global public health challenges, the implications of these results are difficult to ignore.

Depression affects more than 280 million people worldwide and is a leading cause of disability, lost productivity and reduced quality of life. Health systems across the globe continue to struggle with rising demand for mental health services, long waiting lists for therapy and concerns around long-term medication use.

Against this backdrop, exercise stands out as a low-cost, widely accessible intervention that carries additional benefits for physical health, social engagement and overall wellbeing.

The updated evidence suggests it may also have a meaningful role in managing depressive symptoms for many adults.

The new findings come from an updated Cochrane review, a gold standard in evidence-based medicine. The review was led by researchers from a UK university and supported by a national research collaboration focused on applied health research.

It examined data from 73 randomised controlled trials involving nearly 5,000 adults diagnosed with depression. These trials compared exercise interventions with no treatment or control conditions, as well as with psychological therapies such as counselling or cognitive behavioural approaches, and with antidepressant medication.

The headline result is clear. Exercise produced a moderate reduction in depressive symptoms when compared with no treatment or minimal intervention. This effect was consistent across a wide range of studies and exercise formats.

When exercise was directly compared with psychological therapies, the outcomes were broadly similar. This conclusion was based on moderate-certainty evidence drawn from ten trials. In other words, exercise appeared to work about as well as therapy for many participants, at least in the short term.

Comparisons with antidepressant medication painted a similar picture, although the evidence here was weaker. Exercise showed effects comparable to medication, but the certainty of the evidence was rated as low. This reflects limitations in the available trials rather than proof that exercise is less effective.

Many of the studies were small, and some had methodological weaknesses. As a result, researchers caution against drawing firm conclusions about equivalence between exercise and medication.

Even so, the overall message remains compelling. Exercise appears to be a safe and accessible option that can help reduce symptoms of depression in adults. For some individuals, it may serve as an alternative to traditional treatments. For others, it may work best as part of a broader care plan alongside therapy or medication.

One of the strengths of the review lies in its scope. It updates earlier versions published in 2008 and 2013, adding 35 new trials to the existing evidence base. Despite this substantial increase in data, the main conclusions have changed little over time. Exercise helps, but the research still struggles to answer key questions about which types of exercise work best, for whom, and for how long the benefits last.

The updated analysis offers some useful insights. Light to moderate intensity exercise appeared to be more beneficial than vigorous activity. Participants who completed between 13 and 36 exercise sessions showed greater improvements in depressive symptoms than those who exercised less. This suggests that consistency and sustainability may matter more than pushing physical limits.

No single form of exercise emerged as clearly superior. However, mixed exercise programmes, which combine different types of movement, and resistance training showed somewhat stronger effects than aerobic exercise alone. Walking, cycling and similar aerobic activities still offered benefits, but they did not stand out as the most effective options in this analysis.

It is also notable what the review did not include. Certain popular forms of movement, such as yoga, qigong and stretching-based practices, were excluded from the analysis due to differences in study design or insufficient data. These approaches are widely used in real-world settings and often recommended for mental wellbeing. Their absence highlights an important gap in the research and an opportunity for future studies.

Side effects were uncommon across the trials. Among those assigned to exercise, occasional musculoskeletal injuries were reported, typically minor. In the medication groups, participants experienced familiar side effects associated with antidepressants, including fatigue and gastrointestinal discomfort. While neither approach was entirely risk-free, exercise was generally well tolerated.

The question of long-term impact remains unresolved. Few studies followed participants beyond the end of the intervention period. As a result, it is unclear whether the benefits of exercise persist over months or years, or whether continued support is needed to maintain improvements. This uncertainty mirrors a broader challenge in depression research, where long-term outcomes are often underreported.

Experts involved in the review emphasise that exercise is not a universal solution. It appears to work well for some people, but not for everyone. Motivation, physical ability, access to safe spaces for activity and personal preferences all influence whether someone can start and sustain an exercise routine. For individuals with severe depression, low energy and loss of motivation may present significant barriers.

This is why flexibility and choice matter. The review underscores the importance of finding approaches that individuals are willing and able to maintain. Exercise should not be prescribed as a one-size-fits-all intervention. Instead, it should be tailored to personal circumstances, interests and capacities.

The broader implications for healthcare systems are significant. Psychological therapies are effective but often difficult to access due to limited availability and long waiting times.

Antidepressant medication can be effective, yet concerns persist about side effects, adherence and withdrawal. Exercise, by contrast, can be delivered in a variety of settings, from community centres and gyms to parks and living rooms. It can be supported by healthcare professionals, fitness instructors or peer-led groups.

However, experts caution against oversimplification. The current evidence base is constrained by the quality of many trials. Most studies included fewer than 100 participants, reducing their statistical power. Some lacked robust methods for randomisation or blinding. These limitations make it harder to draw definitive conclusions or develop precise clinical guidelines.

Researchers argue that future progress depends on fewer but larger and better-designed trials. A single high-quality study with adequate participant numbers and long-term follow-up may provide more valuable insights than dozens of small, poorly designed experiments. Such trials could clarify which forms of exercise are most effective, how they compare with standard treatments over time, and how best to integrate them into routine care.

The review also raises questions about equity and access. While exercise is often described as low-cost and widely available, this is not universally true. Safe outdoor spaces, affordable facilities and supportive social environments are not evenly distributed. Addressing these disparities is essential if exercise-based interventions are to benefit diverse populations.

From a public health perspective, the appeal of exercise extends beyond mental health. Regular physical activity reduces the risk of cardiovascular disease, diabetes and other chronic conditions. It can improve sleep, cognitive function and self-esteem. When framed in this broader context, promoting exercise as part of depression care aligns with holistic approaches to health.

The updated Cochrane review does not call for exercise to replace established treatments. Instead, it strengthens the case for recognising physical activity as a legitimate and potentially powerful tool in the mental health toolkit.

For clinicians, it offers evidence to support discussions with patients about non-pharmacological options. For patients, it provides reassurance that movement can be more than a lifestyle choice. It can be part of recovery.

As depression continues to place a heavy burden on individuals and societies, the search for effective, accessible and sustainable treatments remains urgent.

This latest review reinforces an encouraging message. Movement matters. It may not be a cure, and it may not work for everyone, but for many people living with depression, exercise could offer a alternative, meaningful step towards feeling better.