The Jumping jack exercise is named after its inventor, general “Black Learn how to perform the jumping jacks the right, proper way below. Page 1 | Watch the Jumping Jacks video to see this exercise in motion. Get step by step instructions to properly execute the movement and get the most of your. Jumping Jacks are a great addition to any at home cardio workout. Find out how many reps you should do. You want to squat a little as you land to help load your legs for the next jump while also landing softly to protect your knees. Keep your hands open with your palms facing away from you during the first part of the movement. Choose the fitness program that's right for you and start today! Set 3 Walking Dumbbell Lunge You'll need: Learn simple lifestyle changes and adopt new habits to regain energy, reduce cellulite and bloating, and reveal a sleek, sexy and healthy summer body! This is a great Jumping Jack Variation to toast the legs and butt.