Stress has been found to make people go crazy mentally and physically. It can also cause numerous health problems. Stress is a sickness so to speak.
Answer:
includes spectators and participants
Explanation:
Sit-ups I hear is hard on the back, I don't think people like these now a days.
Leg extensions as apposed to squats for quads I've heard about being bad for knees as well.
Answer:
Transport of nutrients, oxygen, and hormones to cells throughout the body and removal of metabolic wastes (carbon dioxide, nitrogenous wastes).
Explanation:
See above.
If you can make my answer the brainliest that would be much appreciated. Thanks!