60 minutes, which is one hour of vigorous activity a day.
they're human aren't they? so wouldn't the answer be how many hours of sleep does a human need? and the answer is about 8 hours.
You need 5 hours or exercise a day
5 hours
for 7 hours
300 hours
3 hours they need to do anything they can
How many hours of school does one need to do massage in a Chiropractic office?
As many as they need to.
12 hours
a lot of hours
14 hours
%HERE_GOES_TEXT% five hours