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This Boxing-Style HIIT Workout Is Designed for People with Knee Pain
HIIT workouts don't have to be all about the jumping or squatting or...squat jumping.
The Challenging Arm Workout for Women You Can Do Right at Home
Bonus: You can do it right at home.
Sports Illustrated Cover Model Kate Upton Has Some Seriously Impressive Fitness Skills
Her workouts are no joke.
I Committed to 30 Days of Circuit Training and Finally Enjoy Exercise
What used to feel like pure torture is now the only way to make it through my day.
This 30-Day Outdoor Circuit Training Challenge Will Amp Up Your Adventure Game
Up your outdoor game in 30 days
This 90s-Inspired Circuit Workout Is Perfect for a Throwback Gym Selfie
Aka pretend you're on 'Legends of the Hidden Temple'
Work Out Like An Australian with This Total-Body Toning Circuit
Fast and fun: that's the workout mantra from Down Under.
The 4-Minute Circuit Workout You Can Do Anywhere
We dare you to tell us you don't have time for this total-body routine.
The Complex-Moves Circuit You Should Add to Your Workout Routine—and Why
The results you want in half the time.
Circuit Training Goes Old School for a Total-Body Burn
Put a fresh spin on old school bodyweight moves.
Instagram Star Kayla Itsines Shares Her 7-Minute Workout
Get ready to #sweatwithkayla: The creator of the Bikini Body Guide designed an exclusive 7-minute circuit workout for us.
Speed-Building Hills Sprints That Sculpt All Over
Runners, tackle tough hills—minus the huffing and puffing—with this surefire circuit.
Buh-Bye Boring Beach Workouts! Build Serious Strength on the Sand
Take your routine to shore to torch two times the calories and sculpt every inch of your beach bod.
10-Minute Tighten-and-Tone Circuit from Shaun T
The Insanity founder is back at it with this quick but effective workout routine that targets all your trouble zones.
The USWNT Endurance Circuit Workout
Train like a U.S. Women's National Team member with this endurance workout straight from the coach.
Nike+ NYC Exclusive Two-Week Training Plan to Become a Better Athlete
Are you a runner who shuns strength training? A gym rat who hates cardio? Follow this exclusive two-week training plan to become stronger, faster, and fitter.
Rev up your metabolism and burn more calories around the clock with this muscle-making circuit.
3 Strength Exercises from Snowboarder Elena Hight
The 2-time Olympic snowboarder shares 3 exercises that keep her body strong and injury-free.
60 Seconds to a Slimmer Body
60 seconds seems like nothing, but these fast circuits will prove that's all you need to tighten and tone your body.
The Best Fat-Burning Workout for a Packed Gym
These super-effective moves don't require tons of room or equipment—but deliver amazing fat-burning results.
4 Exercises for a Full-Body Blast
An effective workout doesn't need to be complicted. Do 4 rounds of this progressively challenging circuit to torch calories and tone up from head to toe!
The 15-Minute Cardio Blast
Keep holiday pounds at bay with this targeted training session that's as effective as 30 minutes on the treadmill.
The 20-Minute Total Package Workout
Squeeze in a complete cardio and strength session in minutes with our Black Friday Fitness program.
The Insanely Effective 15-Minute Workout
Make every second count with this action-packed plan that rolls cardio and strength training into one.
The 'I'm-Too-Busy-To-Work-Out' Workout
Only have time for one workout this week? Do this total-body, fat-burning circuit!