If your arms have started to lose their firmness, you're not alone. Muscle tone naturally declines with age, and areas such as the triceps and shoulders often show this decline first. The good news is ...

After 60, building muscle should be high on your priority list—and for good reason. Once you hit 30, you lose anywhere from 3% to 8% of your muscle every 10 years. If you don't step up your exercise ...