Start with your feet together and arms at your sides. Jump your feet out to the sides while raising your arms overhead. Repeat this motion quickly for 1-2 minutes.
Start by doing a high plank with your hands right under your shoulders. Bring your knees to your chest and back again, like you're running in place. For one to two minutes, do this movement as quickly as you can.
Put your hands under your head and bend your knees as you lie on your back. As you paddle your legs like you're on a bicycle, lift your feet off the ground and bring your other arm toward your other knee.
Place your feet about hip-width apart. Put your knees as close to your chest as you can and start running in place. Hold on for one to two minutes. High knees make your heart beat faster and use your core muscles.
Put your wrists on the ground and line up your elbows under your shoulders to start. Stretch your legs out behind you and rest your feet on your toes. A straight line should run from your head to your feet.
Put your feet flat on the ground and bend your knees. Keep your back straight and lean back a little. Hold hands together and twist your middle up and down until you touch the ground on each side.
Begin in a standing position, then quickly jump down into a squat position with your hands on the ground. Kick your feet back into a push-up position, perform a push-up, then hop your feet back to the squat position.