Start with elevated knees. Stand tall and engage your core. Bring your left knee to your core until your thigh is parallel to the floor.
Switch legs quickly by lowering your left leg and raising your right knee toward your midsection. Three sets of 30-to-60-second repetitions.
A hip-width stance starts the standing side crunch. Bend your elbows and place your hands behind your head. Bend your torso right till your elbow is a couple inches from your ribs. Return to the start and repeat on the left. Do three 12-rep sets.
Start by holding dumbbells in both hands. Raise your right leg behind you and drop your chest, keeping your left foot grounded.
As the weight is lowered to shin level, keep your left knee bent and activate your glutes and core. Lift both dumbbells to the starting position and lower your lifted leg with control. On the other side, repeat. Do three 12-rep sets.
Dumbbell side bends require standing tall with a dumbbell in your right hand. Lower the weight to over your right knee, pressing your hips to your left.
Return to the starting position slowly to finish your first rep. Stay core and obliques active during the movement. Three sets of 10 reps per side.
Start with your feet together and arms at your sides. Quickly spring your feet out wider than hip-width and raise your arms aloft. Jump your legs back to the starting position as you descend your arms in another fast motion. For four sets, do 25 reps.