Intervals & Circuit Training
LATEST STORIES
Strong, Fast, and Fit: Turn Up the Heat (Month 2)
Month 2 of our six-month workout program includes new exercises, tougher cardio, and some combo workouts that will take your fitness to the next level.
Strong, Fast, and Fit: Build Your Base (Month 1)
Month 1 of our six-month get-in-shape program is all about waking up your muscles, getting your heart pounding, and preparing you for tougher workouts to come.
Strong, Fast, and Fit: Your Action Plan
Are you going through all the motions, but not getting the results you want? A master training plan founded on the principles of periodization is the surest route to reaching your goals.
The Upside of All-Out Intervals
The results of a 12-week study on interval training offers good news for exercisers short on time.
The Workout: Rest-Based HIIT (Video)
This workout offers the benefits of interval training to burn fat, boost stamina, and build muscle — with more room for rest.
The Workout: Rest-Based HIIT Training
Intuitive, rest-based interval training scorches fat and builds fitness — without leaving you wrecked.
The HIIT-Superset Workout
Ramp up your fitness with these quick interval routines.
The Workout: The HIIT-Superset Workout (Video)
Try these HIIT supersets in five-, 10-, or 15-minute intervals to ramp up your routine.
High-Intensity Intervals Change How Muscle Cells Manage Calcium
New study explains why short, intensive bursts of exercise are as effective than long workouts — and why antioxidants can undermine endurance training.
The Workout: New Twists on Old Faves
Get strong, build power, and burn fat on your go-to cardio machine.
Expert Answers: Why Should I Do Sprints?
Are including sprints in workouts worth it?
Worst-Case-Scenario Fitness
A hardcore workout that will prep you for surviving in the wilderness, escaping danger — or handling everyday household chores.
Ready-for-Anything Fitness: 7 Essential Functional Moves
Why you need Functional Training and how to do it.
The Tri-Planar Workout
These 3D functional tri-planar moves will give you a workout that’s fully rounded.
The Core Circuit Workout
You need a solid core for everyday life. This basic body-weight circuit builds both strength and stability.
The Ultimate Outdoor Obstacle-Course Workout
Prepare to tackle a variety of races with this scalable training plan that’s designed to boost power, strength, and mobility.
What is an As Many ROUNDS As Possible (AMRAP) Workout?
Learn about the distinction between “as many ROUNDS as possible” and “as many REPS as possible” workouts.
Steady-State Cardio Vs. High-Intensity Interval Training
Discover why a blend of both high- and low-intensity exercise is the best system of cardiovascular training.
The 20-Minute Kettlebell Workout
A kettlebell circuit is one of the most efficient ways to work your entire body. Try this 20-minute workout to become stronger, leaner, and more powerful in record time.
Expert Answers: HIIT for Weight Loss, Joint Pain, and More
We get the pros to answer your questions on high-intensity interval training for weight loss, easing joint pain, going deep on squats, and more.
3-Speed Cardio
Cardio workouts stuck in one gear? Bust out of your rut — and build fitness — with this collection of metabolism-boosting workouts.