We all know that exercise is good for us, but how it compares, let’s say you have 2 individuals doing the same amount, types, etc. of exercise. From an appearance side of things I used to encounter that at the gym and years ago I used to say it was because of the genes. You could see on individual just buffed and the next person right around the same age, weight, etc. not get the same results. 
Perhaps this is the next step to getting the right exercise, a genomically based exercise routine? We are not going to have much guess work at all soon it appears, but the studies here are not done yet and more information needs to follow. When we are all sequenced someday, we can look forward to personalized workouts, we have those now, but they too could become scientific and we may have several treadmills to choose from, based on which one meets our DNA criteria for the best results (grin). BD
When you put in hours at the gym, you expect to get fitter. It turns out, that assumption doesn't hold true for everyone. A new study suggests specific genes may determine, at least in part, how much we really benefit from exercise.
While "benefit from exercise" can mean plenty of things, from slimming down to boosting one's ability to complete a marathon, the researchers specifically looked at what is called VO2 max, or aerobic capacity. This is a measure of how much blood your heart pumps and how much oxygen your muscles consume when they constrict to, say, move your legs on a treadmill.
Bottom line, VO2 max represents your endurance. And this study, detailed today in the Journal of Applied Physiology, suggests a group of 29 genes could potentially categorize individuals into low, medium and high responders to exercise.
Is exercise worth your time? Genes tell - Fitness- msnbc.com
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