What’s the context behind the question?
according to hairlossstressactions.com
"Yes, stress and hair loss can be related. Three types of hair loss that can be associated with high stress levels are: Telogen effluvium. In telogen effluvium (TEL-o-jun uh-FLOO-vee-um), significant stress pushes large numbers of hair follicles into a resting phase."
Answer:
the skelatal system gives support and strength for your body.
Going to the movies, going to the gym, biking etc.
Weight training uses resistance against muscle contractions.