The answer is cardio respiratory endurance :)
Make it sound fun.
Help them come up with ideas to do
set goals
add a prize at the end to make them strive for.
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."