The best way to prepare for a workout is to stretch key muscles first and follow the stretching with a jog to get the blood flowing to the muscles, true or false

This answer is false. I'm not completely sure why, but I do know that if you stretch key muscles first, you're more likely to pull a muscle when exercising.

teens need 8-10 hours of sleep. it kind of depends on what time you get up. but prob around 10 or 11 p.m. or 11 or 11: 30 p.m.