Answer is A. More than 90 degrees and you're not getting the full work out, less than 90 degrees and you're burning energy unnecessarily
Answer:
this all depends on your age and weight etc...
Explanation:
but the average human needs at least 8 hours of sleep and 8 cups of water a day.
if your healthy it means you eat well and your weight is at the normal weight. exercise if you go out and run or lift weights etc...
It would be a stimulant drug.
Hope this helps!