Aerobic exercise for low mood and depression

Sustained moderate cardio — brisk walking, cycling, running — as a mood regulator.

Why it works

Aerobic exercise drives neuroplasticity: it raises BDNF (a growth factor supporting neurons), normalizes a stress-axis (HPA) that runs hot in depression, and increases endorphin and endocannabinoid signaling. Over weeks these shifts improve the brain’s capacity to regulate mood, beyond any single post-workout lift.

How to do it

1. Aim for moderate intensity you can sustain while still talking but not singing.
2. Build toward roughly 3–5 sessions a week; consistency matters more than any single hard session.
3. Start small enough that you finish wanting slightly more, not depleted — adherence is the whole game.

Evidence

Randomized trials and meta-analyses find aerobic exercise produces clinically meaningful reductions in depressive symptoms, with effects in some studies comparable to first-line treatments for mild-to-moderate depression. (rct)

Effect sizes vary widely with study quality and adherence, and many trials are small. Exercise is an adjunct, not a substitute for treatment of severe or clinical depression.

Common mistake

Going too hard too soon to "fix it fast," burning out within two weeks. The antidepressant effect needs sustained weeks, so the dose you can keep doing beats the dose that impresses you.