Muscle tissue may also become less flexible, and muscles can lose tone, which is harder to replace.Exercise can help to slow or prevent bone and muscle loss, and good nutrition, including calcium, can help seniors maintain strength and good healthhttp://adam.about.com/encyclopedia/Aging-changes-in-the-bones-muscles-joints.htmReplyDeleteTiaraShenesNovember 4, 2010 at 10:06 AM1.)Changes in posture a