Exercise for anxiety has accumulated genuinely reasonable evidence: meta-analyses find moderate reductions in anxiety symptoms, with effects that hold across both aerobic and resistance training. It isn’t equivalent to CBT for a diagnosed anxiety disorder, and it isn’t nothing.
The mechanism nobody mentions
For panic specifically, exercise does something interesting: it produces a raised heart rate, breathlessness, sweating and chest tightness in a context where you know exactly why they’re happening.
That’s functionally interoceptive exposure. You’re experiencing the sensations that frighten you, repeatedly, without any catastrophe — which is precisely the learning that ends panic disorder.
It also explains a common and unfortunate pattern: people with panic often stop exercising, because the sensations feel like the onset of an attack. That avoidance removes one of the most useful things available to them.
The dose
Trials generally use moderate to vigorous aerobic exercise, three times a week, twenty to forty minutes, over eight to twelve weeks. Higher intensity tends to produce larger effects on anxiety specifically, which is the opposite of what people expect.
Resistance training also has evidence, including for anxiety specifically, and is a reasonable alternative for anyone who dislikes cardio.
Single sessions produce a short-term reduction lasting a few hours. The durable effects come from consistency over weeks.
How to start when the sensations frighten you
Start low and build, and — importantly — don’t use safety behaviours. Exercising only with someone present, only near home, only where there’s a phone signal, stopping at the first sign of a raised heart rate: each of these prevents the learning.
A useful framing, which a clinician may formalise: the raised heart rate is the point. You aren’t tolerating it in order to get fit; you’re practising it.
What it isn’t
It isn’t a treatment for a disorder that has taken over your life, and being told to go for a run when you can’t leave the house is worse than useless. Exercise sits alongside treatment, lowers the baseline, and improves sleep — which may be most of its benefit.
It also has a failure mode worth naming. Compulsive exercise, done to discharge anxiety or to prevent something bad, becomes a ritual rather than a benefit. The test is whether missing a session produces disappointment or dread.