Intervals & Circuit Training

Build serious muscle this month with our amped-up, four-day lifting schedule.

This DIY workout offers a strength and cardio challenge — with no gym, no weights, and almost no space required.

Maintain your momentum during month 3 of our six-month program with these variations on body-weight moves.

Your fitness journey continues with Month 2 of our new and improved six-month workout program.

Your fitness journey starts right here with our new and improved six-month workout program. Welcome to Month 1.

A countdown body-weight workout you can do virtually anywhere in just 10 minutes.

High-intensity intervals transform jumping rope from child’s play to a fat-burning, coordination-building workout.

Use your versatile kettlebells as resistance-training tools to build full-body strength.

Up the ante on your next walk with this body-weight interval workout.

This eight-week metcon workout builds strength and burns fat — all in 
a short, sweet, and sweaty metabolic-conditioning package.

Grab a pal and head outside to tackle this built-for-two routine.

Running coaches share their tips on building speed for both short and long distances.

Work your body head to toe with this minimalist strength-and-conditioning blast, which includes lateral jumps, side-to-side squats, and burpees.