Answer:
A.Hiking a trail
B. Resting after vigorous exercise
C. Getting nine hours of sleep every night
Step-by-step explanation:
Exercising until it hurts is unhealthy and does not promote any improvement in your mental or physical health, but only harms your body and mind. In order to improve your physical and mental health, any exercise is valid as long as it is done consistently, respecting your limits and providing you with a rest time. Remember that everything in excess is bad, with exercise is no different.