Cardio

Develop core stability and cross-body coordination.

This lateral move builds lower-body strength — and boosts cardio at the same time.

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

Fine-tune your form and sequencing to maximize the rewards of indoor rowing. Explore two creative workouts to enhance power and strength.

Power up your lower body with box-jump exercise moves.

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

This workout mixes low-impact stair-stepping with high-intensity interval training.

Get more results in less time with high-intensity interval training.

Norwegian cross-country skier Marit Bjørgen has won eight Olympic gold medals. Here’s how she trains.

This high-intensity workout takes hill repeats to the next level.

Forget pedaling without a plan. This strength-building, fat-burning workout reimagines the indoor-cycling routine.

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

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

This full-body explosive workout focuses on speed and power to drive up your heart rate, boost your metabolism, and add a little pep to your step.