Triple The Body Benefits

Blast major calories and carve your core while you fire up every last muscle. Meet The th killer workout you’ll want to add to your HIIT list. 

- Lauren Mazzotazzo

There’s an art to the best-designed interval routines. They’re the ones that keep your metabolism revved from start to finish but don’t totally tap you out before you’ve worked every muscle group. Experience that ideal mix here. “The intensity and speed of this workout will keep your heart rate up while building strength all over,” says trainer Chase Weber, creator of 333 Method in Los Angeles.

The sample session on the next page follows his simple setup: You do three circuits of three targeted exercises—a calorie blaster, a strengthener, and a stability move—three times through. Each circuit should take about 10 minutes to complete, Weber says, so you’ll be pushing your pace to finish.

“The stability moves— the ones that challenge your body to balance —engage your core muscles, which builds definition,” he says. The result is a total-body workout that will leave you lighter and tighter.

WARM-UP Start with a stretch: Lunge forward with left leg, right heel lifted, and bend both knees until right knee almost touches the floor. Hold for 10 to 20 seconds. Switch sides; repeat. Then do 15 squats, 10 seconds of butt kicks and high knees, 12 walking lunges, 20 supermans, and 50 sit-ups.