Testosterone Steroid
Ovaries Estrogens and progesterone
I Think that this help you
Explanation:
How Age and Exercise Affect Your Max Heart Rate. The relationship between the heart and exercise has been studied for more than six decades and the research is clear: Max heart rate—the highest heart rate you can safely hit during exercise—decreases with age regardless of lifestyle or level of fitness.
The best way is to drink milk and exercise, since Milk gives calcium and exercise helps keeps bones strong.
D. C is true, ignore the other person. Children also have depression. Part of depression is losing interest in your normal activities.
