Power Skip Stand with your feet hip width apart and brace your core. As you pull your right knee up and across your chest swing your left arm forward and hop off your right foot. Land on the ball of your foot, bring your right foot to the floor and then repeat the movement with the opposite limbs. The exercise is most effective if you focus on bringing your knees as high as you can, rather than trying to skip as fast as you can. Repeat the movement continuously for 30 seconds to a minute. High Knees Stand with your feet hip width apart. Bring your knees up to your chest in an alternating, continuous pattern, as if running in place. Repeat the movement for 30 seconds to a minute. Alternating Punches Stand with your right foot 1 step ahead of your left foot, hips facing forward. Bending at the elbows, raise both of your fists to chest height. Slightly rotating your torso, punch your left arm straight out in front of you. Punch as quickly as possible for 15 to 30 seconds, then switch your stance and punch with your right arm for the same amount of time. Mountain Climbers Start on your hands and toes with your arms fully extended beneath your shoulders, legs fully extended behind you. Flatten your back. Pull your left knee to your chest, then immediately switch legs, driving your left leg back as you pull your right knee up to your chest. Repeat in a continuous motion for 30 seconds to a minute. Jumping Jacks Stand tall with your feet together, arms at your sides. Jump into the air, simultaneously raising your arms to the sides of your head and spreading your legs so that you land with your feet shoulder-width apart. Jump back to starting position. Repeat the movement continuously for 30 seconds. Rest for 1 minute between sets. Jumping Rope Hold a jump rope behind your back with a handle in each of your hands. Stand with your feet together. Flare your wrists out to the side. Begin jumping lightly, a few inches off the ground, then whip the jump rope over your head. When the rope hits the floor in front of you, softly jump and sweep the rope under your feet, landing on your toes. Establish a rhythm and repeat these motions continuously for a minute to 30 seconds. Inchworm Begin with your feet hip distance apart and your core tight. Bend at the waist, place your hands on the ground, and walk them forward, keeping your legs straight. When your legs are parallel to the floor, walk your hands backward until you are standing again. Continue to repeat the movement for 30 seconds to a minute.