Staying upright during vigorous physical activity is best described as having good
a. balance
b. flexibility
c. agility
d. reaction time

Staying upright during vigorous physical activity is BEST described as having good balance. Correct A

Balance  denotes the ability to stay in control of body movement. There are two types of balance: static and dynamic. Static balance  is the ability to balance while stationary, while dynamic balance is the ability to move outside of the body's base of support, while maintaining postural control.

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.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.