immune system
yes
estrogen
testosterone
There is no evidence that a creatine supplement will strengthen your immune system and reduce your risk of illness.
You can strengthen your muscular system by using it. By lifting weights or running, you are using the muscles, and they are growing and toning. When you don't use your muscles, the are not as strong and you ware weaker as a whole.
it can strengthen the lungs
Have kids... it is like nerve exercise, every day
your butt
A plan to organize and strengthen the nation's economy (APEX)
Exercise and strengthen leg muscles and cardiovascular system.
Help build up your immune system and strengthen it
yes they can causee it can help you stay healthy.