Exercise and Mental Health: How Movement Treats Anxiety, Depression and Stress

The evidence for exercise as a mental health intervention has grown substantially — to the point where major clinical guidelines now list exercise as a first-line treatment for mild to moderate depression and anxiety.

Exercise and Depression

Multiple large meta-analyses demonstrate that structured exercise reduces depressive symptoms with effect sizes comparable to antidepressant medication for mild to moderate depression. The mechanisms include increased production of BDNF (brain-derived neurotrophic factor, which promotes neuroplasticity), release of endorphins, serotonin and dopamine, reduction of pro-inflammatory cytokines (elevated in depression), and improved sleep quality.

Exercise and Anxiety

Aerobic exercise in particular reduces anxiety through the anxiolytic effect of repeated bouts of exercise — the nervous system learns that elevated heart rate and physical arousal are non-threatening, reducing baseline anxiety reactivity. Regular exercisers have lower resting cortisol and better cortisol regulation in response to stress.

What Type of Exercise Is Best?

The research doesn't strongly favour any particular modality — aerobic exercise, resistance training and mind-body exercise (yoga, tai chi) all show benefits. The most important variable is consistency over intensity:

• Frequency: 3–5 sessions per week shows the best outcomes.
• Duration: 30–45 minutes per session.
• Intensity: Moderate intensity — you can speak in short sentences but not full conversation.
• Type: The exercise you'll actually do consistently is the most effective type.

Exercise for NDIS Participants with Mental Health Goals

NDIS participants with mental health conditions can access exercise physiology funding under Capacity Building — Improved Health and Wellbeing. Our AEPs design programs for participants with anxiety, depression, PTSD and other mental health conditions, working collaboratively with psychology and psychiatry teams where involved.

A Note of Caution

Exercise is a powerful adjunct to mental health treatment — it is not a replacement for professional mental health care in moderate to severe conditions. If you're experiencing significant mental health symptoms, please speak with your GP or a mental health professional in addition to any exercise program.

Building an Exercise Habit When Mental Health Is Difficult

One of the most frustrating aspects of depression and anxiety is that the conditions that most benefit from exercise are also the ones that make starting and sustaining exercise the most difficult. Low mood reduces motivation and energy. Anxiety creates barriers around new environments and perceived performance. Fatigue — a hallmark of both conditions — makes even a short walk feel like an enormous undertaking.

The evidence on how to bridge this gap consistently points toward three principles: start smaller than you think you need to, prioritise consistency over intensity, and reduce barriers to entry as much as possible. A 10-minute walk every day for two weeks produces more durable benefit than an ambitious 60-minute gym session that is abandoned after three attempts. The goal initially is to build the behaviour, not optimise the physiological stimulus.

Social exercise — walking with a friend, joining a group class, exercising with a support worker — has an additional benefit beyond the physiological: it addresses the social withdrawal and isolation that commonly accompany depression and anxiety, providing an additional therapeutic mechanism.

Exercise Physiology for Mental Health Under NDIS and Medicare

For people whose mental health condition is associated with a disability, NDIS funding may cover exercise physiology sessions under the Improved Health and Wellbeing or Improved Daily Living support categories. For those with a diagnosed chronic mental health condition, Medicare's Chronic Disease Management (CDM) scheme allows up to 5 subsidised allied health visits per year with a GP referral and Team Care Arrangement — exercise physiology is an eligible discipline under this scheme.

Our accredited exercise physiologists at Elevate Health work with patients managing anxiety, depression, PTSD and other mental health conditions, often in conjunction with GP or psychology referrals. Sessions are conducted in a low-pressure, supportive environment — in-clinic in Bella Vista or mobile across the Hills District for participants who find clinic attendance difficult. See also our article on exercise physiology for chronic disease for a broader overview of conditions where structured exercise has strong clinical evidence.

When to Seek Professional Guidance

Exercise is a powerful tool for mental health — but it is not a replacement for professional mental health care when that care is needed. If you are experiencing significant depression, anxiety, trauma or other mental health symptoms, please speak with your GP or a mental health professional. Exercise can be a valuable adjunct to therapy and medication — not a substitute for them. If you are in crisis, contact Lifeline on 13 11 14 or present to your nearest emergency department.

Our accredited exercise physiologists in Bella Vista design structured programmes for patients managing mental health conditions, often in conjunction with GP or psychology referrals under Medicare CDM. For information on how exercise physiologists manage chronic conditions more broadly, see our article on exercise physiology for chronic disease. Our Dynamic Resilience System™ approach also incorporates psychosocial factors — including stress and sleep — as part of every patient's assessment and plan.

Frequently Asked Questions

How does exercise help mental health?

Exercise produces multiple neurobiological effects relevant to mental health — including increased production of brain-derived neurotrophic factor (BDNF), regulation of the HPA axis stress response, monoamine release (serotonin, dopamine, noradrenaline) and reduced systemic inflammation. These mechanisms underpin the consistent associations between exercise and improved mood, reduced anxiety and better sleep.

How much exercise is needed to improve mental health?

Evidence suggests that even modest amounts of regular exercise produce meaningful mental health benefits. Most guidelines recommend at least 150 minutes of moderate-intensity aerobic activity per week, alongside two sessions of resistance training. However, some benefit is seen with substantially less — any exercise is generally better than none.

Can exercise replace antidepressants?

Exercise is not a replacement for medication or psychological treatment, and this decision should be made in consultation with a treating clinician. However, there is strong evidence that structured exercise is comparable to antidepressants for mild to moderate depression in some populations, and that combining exercise with other treatments produces better outcomes than either alone.

References

1. Schuch FB, et al. (2016). Exercise as a treatment for depression: a meta-analysis adjusting for publication bias. Journal of Psychiatric Research, 77, 42–51.
2. Stubbs B, et al. (2017). An examination of the anxiolytic effects of exercise for people with anxiety and stress-related disorders. Psychiatry Research, 249, 102–108.
3. Cotman CW & Berchtold NC. (2002). Exercise: a behavioural intervention to enhance brain health and plasticity. Trends in Neurosciences, 25(6), 295–301.
4. Blumenthal JA, et al. (2007). Exercise and pharmacotherapy in the treatment of major depressive disorder. Psychosomatic Medicine, 69(7), 587–596.