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.

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 alternate between short ... Remember to pump your arms and get your body involved. Keep your head up and look ...

HIIT WORKOUTS DEMAND that you give your all ... on the program at a pace that will work for you. You’ll torch your arms in this Upper Body Dumbbell Burner workout using nothing but a pair ...

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 ...

arms, and core. Follow along with trainers Jacqueline Kasen and Gerren Liles in the workout video above, or if you're ready to HIIT it solo, read the instructions below for a self-guided workout.

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.

Engage core to bring shoulders off ground and crunch up to touch toes. Keeping arms and shoulder blades off floor, slowly straighten and lower legs one inch off the ground, then raise. Return to ...

We could all use another HIIT workout in the rotation. This one’ll empty your tank in 20 minutes flat, and only requires dumbbells. In a time when we’re prioritizing workouts we can squeeze ...