 Yeah, what sort of things can it do to the body if you can keep those muscles strong in your legs and in your arms? Well, so important because we know that loss of muscle mass and function is a normal part of growing older, and that can influence your general health and the quality of life. So particularly thinking about leg muscles and why that's relevant, think about the importance of your legs in getting in and out of a chair, climbing stairs, walking, your mobility, even walking.