Reach back with one leg and keep your lower back flat. With the leg on the ground, keep your knee fairly straight and sit back into your hip. Don’t twist.

32. Burpees

Perform a pushup and, on the way up, drive your knees to your chest. Set your feet underneath your chest and jump up as high as you can. Repeat.

33. Side Plank

Lie on your side and maintain a straight line from head-to-toe.

34. Lateral Squat

Stand much wider than shoulder-width apart. Sit back and squat toward one side while pushing your knee outward and keeping the other leg straight.

35. Deadbug

Keep your glutes off the ground and your lower back flat on the ground the entire time. Extend opposite arms and legs and alternate.

36. Dumbbell Snatch

Imagine you’re in a phone booth. Explode with your lower body and pull your elbow up. Catch the weight with your arm straight overhead.

37. Reverse Crunch

Grab a weight above your head. Bring your knees to your chest and let your legs go back and don’t let your thighs go beyond perpendicular to the ground.

38. Medicine Ball Slam

Slam the medicine ball as hard as you can into the ground.

39. Glute Ham Raise

Keep your heels locked into the machine and curl up while keeping your hips extended.

40. Jackknife

Get into a pushup position with your shins on a stability ball (or TRX). Drag your knees to your chest while keeping your upper body as still as possible.

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41. Step Ups

Keep your front shin perpendicular to the ground. Drive with your heel and stand tall.

42. Kettlebell Windmill