This program is well worth every moment and every dollar I've put into it. I'm a 78 year old woman, I can hit a golf ball with power, I can twist and bend with ease, and I get out of a chair or the bed without any trouble. I recovered very well from knee replacement surgery and that recovery was due to having strengthened the muscles that support my knee. I'm not as consistent as I should be, but still, this GYF program keeps me active, moving and happy.