"It's a 10-minute workout, but I always say it's not how long, it's how strong!" says Warner. Diagonal Bunny Jumps Straighten the jump rope into a vertical line in front of you.

We’re talking, of course, about Jackie Warner, personal trainer extraordinaire, owner of the exclusive Sky Sport & Spa gym in Beverly Hills, and star of her own reality show.

Trainer Jackie Warner says she loves the exercise called sprawls because it is based on mixed martial arts practices. It focuses on the upper body and is very challenging, says Warner, whose ...