Core strength testing has come a long way from the straight-legged, twisting sit-ups used before World War II. We've moved on to bent-knee sit-ups, to crunches and now to the plank pose or hanging ...

Question: Do I gain the same benefits from women’s push-ups (on my knees) as I would if I did men’s straight-leg push-ups? Answer: Many women simply never get to the point where their upper body is ...