The warm-up period of a workout is important because it
A. helps a person to exercise for a longer period of time.
B. guarantees an injury-free workout.
C. slowly and safely raises heart rate.
D. ensures the effectiveness of the workout.
well you always start by warming up and your supposed to after you workout to not just stop working out all together its to help you not go to fast and run out of energy to quick so i'd say C
