Health & Fitness
A 4-Minute Workout That Replaces 1 Hour in the Gym
The exercise called Jumping Jacks forms a part of military training in the USA as it improves physical and aerobic endurance. In the initial position, arms are located along the body. Jump up, while spreading your legs to the sides and raising your arms above your head. Go to the initial position with a quick jump, and repeat the exercise.