On what does the recommended time (duration) of an endurance training workout depend?

List three reasons people may begin using tobacco

Explain why many people are concerned about uv rays? explain what causes the skin to burn in the sun? explain why people should avoid the sun if taking a photosensitive medication?

Peter's doctor calculated his body mass index (bmi) and determined that his fat-to-lean tissue ratio was a bit too high. which of the following should peter increase in his weekly schedule to specifically address this issue?