How long did someone hoolahoop for?

What tissue is designed to contract? Where can one find a guide on how to get faster? If muscles are not sore can you work them again? What foods are the best sources of protein? Why does my chest hurt after doing push-ups? Do you need muscular strength in running? Does eating before exercise increase ones metabolism? How long do shaolin monks meditate for? Are exercise videos beneficial? What is a benefit of better cardio respiratory endurance? How can i lose 60 pounds fast.... I'm 5'6 and weigh 192 At 20 i have an active 3 yr..find it hard to keep up with his energy...? Where can I find a good military workout plan? Deep massage techniques for the satorius muscle must be applied with acution to avoid endangerment of what? If you lose 40 pounds in 4 months is that healthy? Where can you buy a double Dutch rope? Able to move gracefully? What can you do if your back hurts and cant walk? What is the best way to lose 40 pounds if you are 55 and borderline diabetic? Can a student excused in Physical Fitness test? Do push ups build strength?