Intervals & Circuit Training

All you need is three kettlebells and 10 minutes to tackle this fat-burning cardio workout.

This HIIT routine reimagines the treadmill jog, burning fat and building endurance in a quick workout.

This full-body routine can flip from fat-burning to strength-building — simply by switching up your tempo and rep range.

A personal trainer offers several suggestions to spice up your Tabata workout — plus, a four-move Tabata workout.

Get fit and have a blast with this adventurous outdoor workout.

The final four weeks of our six-month training program will help you reach peak form.

Month 5 is the toughest in our six-month training program, with longer workouts, challenging exercises, and fewer days off. Get ready!

In Month 4 of our six-month training program, you’ll ease up a bit as you prepare for the final push to the fittest, strongest, healthiest you yet.

Month 3 of our six-month training program ramps up the intensity, integrating — and testing — your hard work from the last eight weeks.

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.

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.

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.