Gym Equipment sponsored by REBEL Elite Fitness

Slim down fast with kilojoule-blasting metabolic moves.

Fast-twitch muscle fibres burn kilojoules faster than slow-twitch fibres. “This heart-pumping circuit packs in explosive movements in multiple directions, which activate your fast-twitch muscle fibres,” says strength and conditioning specialist BJ Gaddour, who created this workout. Perform each exercise as a one-minute interval: do as many reps as you can in 30 seconds, then rest for 30 seconds before continuing to the next move. Rest one minute at the end, then repeat for a total of three rounds. Got more time? Do up to six intervals.

You’ll need: A low step

Watch one of our staffers perform the moves:

1. Lunge Run

Stand with your feet hip-width apart, arms at your sides. Step back and lower into a reverse lunge, then pump your arms like you’re running for three to five seconds, keeping your core tight. Press through your front heel to return to standing, then quickly repeat on the other side; continuing alternating.

Tip: Make it harder by holding a light dumbbell in each hand.

READ MORE: The 15-Minute Fat-Torching Workout You Can Do Anywhere

2. Low-Box Burpee

Stand facing a box or step with your feet hip-width apart. Sit your hips back, bend your knees and place your hands on the step, then jump both feet behind you so that your body forms a straight line from head to heels. Quickly reverse the movement to return to standing.

Tip: No stairs at home? Do the move on the ground.

3. Skier Swing

Stand with your feet hip-width apart, knees slightly bent; hinge forward at the waist to lower your chest towards the ground, extending your arms straight behind you. In one explosive movement, push your hips forward and swing your arms overhead, rising onto your toes. Note: you’re staying on one spot, not jumping forward. Reverse the movement to return to start. Continue in a quick, rhythmic pattern.

Tip: Make it harder by holding a dumbbell in each hand.

4. Primal Push-Up

Start in a push-up position, then bend your knees and sit your hips back as far as you can, arms straight. In one motion, shift your weight onto your hands and drive your right foot forward into a lunge position, raising your right hand off the ground. Reverse the movement to return to start and repeat on the other side; continue alternating.

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