Morning exercise beats afternoon for SAD.

Morning exercise is the better choice for managing SAD in late winter, primarily because it pairs with the light exposure your brain desperately needs.

Seasonal affective disorder is mostly a circadian rhythm problem — your brain thinks it’s still dark outside because sunrise comes late and mornings stay dim. Morning exercise fixes two things at once: it tells your body clock “wake up” via movement, and you can combine it with light (ideally outdoors or in front of a bright therapy lamp). Afternoon exercise helps mood too, but it doesn’t reset that morning clock the same way.

For type, aerobic is king. Walking, jogging, cycling, even dancing — anything that gets your heart rate up for 20-30 minutes works best. The research is clear that aerobic exercise boosts serotonin and endorphins, which is what SAD patients need. Strength training is fine for general health, but for SAD specifically, go with steady cardio.

Don’t overthink it — just get moving early, even if it’s ten minutes.