Power jumps such as this are a good way to kick up your heart rate in a cardio workout. They're also a fun way to help train your fast-twitch muscles, which we all lose with age. Be sure you are fully warmed up before challenging yourself with jumps.
1 Position your feet hip-width apart, toes pointing forward. Bend your knees and lower your hips, shifting your weight back onto your heels. Pull your elbows behind you with your hands near your hips.