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I don't buy it. Exercise increases cortisol, cortisol increases wakefulness. Cortisol is, in fact, the very hormone that makes you wake up in the morning.
by vitaminbandit 9y ago
I don't buy it.
Exercise increases cortisol, cortisol increases wakefulness. Cortisol is, in fact, the very hormone that makes you wake up in the morning.
- adrianmonk 9y agoYeah, me neither, though in my case it's based on personal experience. Whenever I go for a run, my alertness jumps way up for several hours afterward. If it's in the morning, I get a better start to the day. If it's in the evening, I am energetic and completely uninterested in sleep for 3-4 hours. I do agree that exercise increases your quality of sleep. I've found that it improves my sleep so much that I don't need nearly as much of it. But that's a separate question from whether it delays the start of sleep.