Yesterday, I published a post citing the fact that 95 percent of those who successfully lose weight somehow go on to regain the unwanted pounds within a few years. Now I've happened upon this statistic: 50 percent of people who start an exercise program quit within the first three to six months.

Hey, it happens. I know. In my combined 37 years on this planet, I've cycled in and out of exercise programs more times than I care to count. And while I seem to be doing OK right now -- I do something fitness-related every day -- there's just no telling what might throw me off my course. That's why I always try to remember why I exercise.

I exercise for energy -- even when I'm tired, I force myself to do something. Inevitably, I feel recharged when I'm done. I exercise for strength -- I want strong bones, strong muscles, arms powerful enough to hoist my littlest growing boy into the air on occasion. I exercise for a lean body -- I've seen results, and I don't want to lose them. I exercise for a healthier heart -- my low resting heart rate always tips off my doctors that I'm challenging myself aerobically. I exercise for peace of mind -- I need to escape the madness of my family unit now and then, and I always feel invigorated when I return home. I exercise to boost my mood, ease my worries, diminish my stress, refocus my thoughts, recharge my spirit, and perhaps most important: To keep breast cancer from paying me a return visit. Recent research links five weekly hours of strenuous exercise to a pretty significant cut in breast cancer risk. That's reason enough for me to keep huffing and puffing.

I'd be a fool to give up exercise with all these benefits on my side. And you? Think about why you exercise. Make your list -- get some ideas from this Mayo Clinic article -- and check it twice. And then never forget it.