Nice to see someone actually cares about being fit in this chair-loving industry.
I have been in professional tennis since I was 6. I don't quite play as much today, nor do I compete as much, but I still practice 3-4 times a week, sometimes more. I do train with great players and evaluate my own level of tennis for about top 20 in Canada. I am also currently a hitting partner to a young 14-year old Russian girl who is top 30 in the world her age. Other than tennis, I train in the gym same 3-4 times a week. In the summertime I sometimes bike.