Muscle loss can creep up faster than you think. Whether it’s due to injury, life changes or simply taking a break from working out, the body begins to change almost immediately when you stop using it.

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? You’ve been getting stronger every week, when suddenly—bam—an injury, illness, ...

Some workouts leave you buzzing, muscles pumping, and energy on high. Others leave you wondering if you made any progress at all. The difference often comes down to more than just the weight on the ...