Which is a good indicator of improved fitness?

Lower resting heart rate

lower active heart rate

improved flexibility

Explanation:

The following times are generally considered indicators of a good fitness level based on age and sex. A lower time generally indicates better aerobic fitness, and a higher time suggests a need for improvement.

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.