What is the least amount of time listed that is sufficient to benefit from cardio exercise?
a) 10 minutes
b) 20 minutes
c) 30 minutes
d) 40 minutes

Respuesta :

Hagrid
It needs atleast 20 minutes a day in order to have an effective cardio exercise. 
If you really wanted to have a good cardio exercise that will benefit you and have a good health and healthy lifestyle, then you have to spare your 20 minutes a day.