A. arthritis I'm pretty sure is the answer!!!!
Answer:
bone density.
Explanation:
I used precess of elimination. U cannot improve the bone density by working out. You can improve your cardiorespiratory fitness by doing cardio, e.g. cycling, swimming, running etc. You can improve muscular strength by working out, e.g. push up, sit ups, etc. you can also become more.flexible by expanding ur muscles and tissues.
Your heart rate will go down, causing you to cool down before you are done exercising. This is good because then you won’t have a high heart rate for a long time.