Your muscles are attached to your bones by connective tissue called tendons. The contraction of a skeletal muscle generally causes one bone to move through a specific range of motion toward another bone. By the age of 80, sedentary individuals will lose about half of their muscle mass. Recent research suggests that sound strength training can have a positive effect on cardiac rehab patients. It's a myth that when you stop strength training regularly that your muscles will turn to fat.
Strength training can have a positive effect on osteoporosis.
Load-bearing exercise, performed over an extended period of time, increases bone density. While women benefit greatly from strength training, they don't have the genetic potential to develop bulky muscles because they lack sufficient amounts of testosterone-the hormone that is largely responsible for the development of muscle bulk. Proper strength training can induce improvements in both muscular strength and balance, thereby helping prevent dangerous falls. Proper strength training will not make you muscle-bound. If you lift weights through a muscle's full range of motion, not only will you become more flexible, you'll be as flexible as genetically possible.