https://www.scientificamerican.com/article/should-you-exercise-in-the-morning-afternoon-or-evening/

I am one of those smug people who get up early, down a cup of coffee, and immediately get active. I hit the gym, run the trails, cycle the path, splash the pool, or whatever tickles my fancy that day. Not necessarily because I think it is the ultimate and optimum time to work out, but rather because I like it. I like how it feels. I like how it sets up my day. I like the boost of energy I get from it.

I am also one of those spur-of-the-moment exercisers who will find himself in the middle of the afternoon staring at a blank page (where a blog article or workout plan is supposed to be) and instead of buckling down, suddenly gets up and goes for a walk, rides his bike to the pool, or puts on a yoga video before diving back into work.