Depression and Training: How Much, How, and When It Is Not Enough

Depression does not just take your mood — it takes energy, sleep, appetite, and the ability to make yourself do anything, training included. That is why just go to the gym rarely works: the dose that helps is not the same as the dose you can actually pull off in that state. Here is how much training genuinely helps, what the minimum version looks like on days when you have nothing, and where the line is at which training stops being enough.

What training does and does not do

Meta-analyses of randomised trials show that regular physical activity reduces symptoms of mild to moderate depression, with an effect comparable to other first-line treatments. The protocols in those studies are not extreme: 3 to 5 sessions per week, 30 to 45 minutes, over 8 to 12 weeks. Most people notice a shift after 2 to 4 weeks of consistent work, not after the first session.

What it does not do: it does not replace treatment for severe depression, it does not remove the reason you are in this state, and it does nothing if you train five days and then stop for three weeks. Treat it as one of several pillars — alongside sleep, food, people around you, and professional help — not as a substitute for them.

A concrete week

The framework with the most data behind it:

• 150 minutes of moderate cardio per week (brisk walking, cycling, rowing) — easiest as 5 x 30 minutes or 3 x 50 minutes.
• 2 strength sessions per week, 4 to 6 exercises each, 2 to 3 sets of 6 to 12 reps, 90 to 120 seconds rest.
• 6,000 to 8,000 steps per day as a baseline, independent of training.
• Cardio intensity: RPE 5-6 out of 10 — you can speak in full sentences but could not sing.

If you have to pick one, pick the one you will actually do. Two strength sessions a week give the most return per hour spent; walking outdoors adds daylight and getting out of the flat, which is worth something on its own when you are depressed.

The minimum dose for bad days

The real problem is not intensity — it is that the plan gets written on a good day and executed on a bad one. Decide in advance on a version you can do in your worst state:

1. Get dressed and go out for a 10-minute walk. That is the whole task, with no requirement that you feel better afterwards.
2. If you do get to the gym: 2 exercises, 2 sets, 10 reps, at roughly 50-60% of your usual load. Twelve to fifteen minutes total, then you leave.
3. At home: 3 rounds of 10 bodyweight squats, 5 push-ups (knees are fine), and a 30-second dead bug. Six to eight minutes.

The rule worth remembering: 15 minutes four times a week beats 75 minutes once every ten days. Consistency is the variable that keeps showing up in the results, not the weight on the bar.

Setting the training up so it survives

• Leave 2 to 3 reps in reserve on every set. Training to failure adds fatigue and raises the odds you skip tomorrow.
• Do not test maxes while you are in a bad stretch. Working at 65-75% of 1RM is plenty for progress.
• Keep the same plan for 6 to 8 weeks. Picking a new program every week is procrastination, not training.
• Fix the slot: same days, same time, ideally before the day starts eating you.
• After each session log two things only: that you showed up, and a mood score from 1 to 10. In a month you will have real data instead of an impression.

Sleep, caffeine, alcohol, and food

Bad sleep amplifies both the depression and the feeling that training is going nowhere. Aim for 7 to 9 hours and the same wake-up time every day, weekends included. Keep caffeine under 400 mg per day (roughly 3 to 4 espressos) and none after 2 p.m. if you wake up during the night.

Alcohol is the single worst factor in this combination: it worsens mood the next day, wrecks REM sleep, and blunts recovery. For food, covering the basics is enough — 1.6 to 2.0 g of protein per kilogram of bodyweight per day and a breakfast with 25 to 30 g of protein. When appetite is gone, a 400-500 kcal liquid meal beats a skipped one.

If you are on medication

Antidepressants and training are not mutually exclusive; they work well together. A realistic expectation: in the first 2 to 4 weeks on a new medication you may get more fatigue, more sweating, or a higher heart rate at the same load. Cut your volume by 20 to 30% during that window (for example 3 sets instead of 4) and build back gradually. Changes in appetite or bodyweight are a reason to talk to the doctor who prescribed it, not a reason to stop on your own.

When to see a doctor

• Symptoms last longer than 2 weeks and affect work, school, or relationships.
• Thoughts of self-harm, or of not minding if you were gone — that is urgent, same day, not next week.
• Unintentional loss or gain of more than 5% of bodyweight in a month.
• Fatigue that does not lift even with 8 hours of sleep — worth checking thyroid, iron and ferritin, B12, vitamin D, and blood sugar.
• Chest pain, fainting, or heart palpitations during training — stop and get it checked.

The short version

• Aim for 150 minutes of moderate cardio and 2 strength sessions per week; the mood effect usually shows up after 2 to 4 weeks.
• Have a minimum version ready for bad days: a 10-minute walk, or 2 exercises x 2 sets x 10 reps.
• Leave 2-3 reps in reserve and skip max testing while you are in a bad stretch.
• Sleep 7-9 hours, caffeine under 400 mg and none after 2 p.m., alcohol to a minimum, protein 1.6-2.0 g/kg.
• Training is an addition, not a replacement — with symptoms past two weeks or any thoughts of self-harm, see a doctor.