I’m a certified personal trainer and I’ve been doing this one move regularly to improve my push-up strength

Woman wearing sportswear in high plank position. She is outside on a boardwalk.

Completing a perfect push-up is an admirable goal for anyone. Being able to push your bodyweight off the floor in one fluid movement is a fantastic marker of strength.

That said, the move is deceivingly challenging, requiring good core, back and shoulder stability. Sagging hips in a push-up is a no-no.