Which of the following should you try to assert for 20–30 minutes during exercise?

a) Target heart rate
b) Anaerobic glycolysis
c) Maximum heart rate
d) METS

Answer:
Target heart rate. If you did the Maximum heart rate, you could kill yourself. I hold no clue what the other two choices mean.

It really depends on what you are trying to pull off with exercise. Weight loss, lack of complaint, fitness.