Finish the Women's Health+ Ultimate HIIT Challenge strong with this 20-minute upper body bodyweight workout. Today's program uses fast-paced lateral exercises to strengthen and your arms ...

HIIT WORKOUTS DEMAND that you give your all ... you’ll simultaneously chisel your arms, core, and legs while also ramping up your heart rate to torch plenty of calories. Grab a pair of dumbbells ...

You’ll push your abs, arms, legs—everything—to the limit in this rapid-fire session. (And when you're done with this session, head back to your Ultimate HIIT homepage for more from the program!) ...

Today we're going to do a High-Intensity Interval Training workout ... Make sure you're swinging your arms with your legs. All right, five more seconds. All right, 10-second rest.

HIIT workouts speed up the metabolism ... Jump both feet out to the sides as you raise the arms out to the sides and up overhead. Bring the arms down as you jump the feet back to center.

Are HIIT routines too strenuous after the age of ... The machines put both the arms and legs into motion but use gliding ...