When you think about it, pretty much everyone has tried to do a push-up at at least one point in their lives. Push-ups are the most common strength training exercise. Bar none. More than pull-ups, or even crunches. However, have you ever asked yourself, am I doing the push-up correctly? If someone says he can do 50 or more push-ups in a row, he typically can’t complete one PERFECT push-up. And if an athlete says he can do 100 push-ups, his true number is …