Exercise is not just about vanity. Muscles have very important functions as we age. The 5 main functions of the muscular system are movement, support, protection, heat generation, and blood circulation.Muscle loss dramatically speeds up as we get older and especially after a knee or hip replacement. The good news is that it can be reversed! If you start to strength train, you can build muscle at any age.please make sure to pause the video to get a good look at the slides. Also save this reel as