Train your chest, back, abs—and get some cardio in—with this quick-hit TRX routine.
WHAT IT IS

Hang a TRX or other suspension trainer from a secure point overhead,
then set a timer for 10 minutes. Start the time and complete the following four exercises as a circuit: TRX rows, TRX chest press, TRX knee-ins, and a stair or treadmill run. (See the “How to Do It” box for rep ranges.)
WHY IT WORKS

“I love this workout because it’s simple but gets all your muscles activated quickly,” McDermott says. “The burn kind of sneaks up on you.”