Hi, and welcome, guys. We're going to do a 10 minute ab exercise. Five exercises, one minute each, and do two rounds of that. So we're going to get started with a simple crunch. Lay on your back.

This 10-minute core workout focuses on challenging your abs, thighs, and lower body. PS Fit instructor Natalie White shows ...

which I’ve always found a good challenge. You could double up the workout The 10-minute session will leave your abs aching, ...