Well Doing all three every time I go to the YMCA is all I can do... But It's 10 minutes on each right now I just had knee surgery in November so its all my knee can handle for now but leave it to my son and I will be doing 20 minutes on all three everytime I go ha ha ha... He forgets I am 41 and he is 19 and he is a professional MMA fighter and in a lot better shape then I am! For now But he better watch out because WHEN I make it to my goal weight I will leave him in my dust