I like to sleep in the morning. Then I have to go to work. In the evening I have poker on my schedule, so I don't have time for sports. Although this is a rather frivolous attitude to my own health, I hope I can cope with it..
I would find afternoon better suited to me. When I was still in the workforce, there was no choice, except on the weekends. After retirement, I find it takes my body several hours to wake up and warm up before I could play tennis or have a workout.