I have been there too. Im currently working between 50 and about 70 hours a week. Anyway I carry a timer with me when I go to the gym. I work out 3 days on and one day off when the timer says one hour I finish that exercise and quit. I believe that where there is a will there is a way! I started working out in 1980 and have been doing it ever since. Im 54 right now. I havent always lifted free weights but I have always done something, running, machines, etc.