How do you play jacks and balls?

Why is exercise good for your body? Can you do deadlifts without weights? What are the benefits of incorporating woodchoppers exercise into a workout routine? Who is the inventor of yoga? Why are aerobic exercises good for the body? What does an elliptical machine do? What is a bench table? Do you get shorter when you lift weight? What is max VO2? What are the best treatments for cellulites? Can you become more flexible at 44 years old and how do you do it? Why do some people wear their shoes with the outside of the heel wearing out faster than the rest of the shoe? What does the stairmaster work? What is the average weight a teenager should be? What exercises can I do to improve my 120 lb grip strength? How many calories do you burn on treadmill for 1 hour? Why is my inner elbow twitching? What is the maximum weight this bench will support? How come your body shuts down if you don't sleep? Why do my weights feel heavier during certain workouts?