HERE'S HOW I became an expert on building muscle when you’re over 40: I turned 40 (and then 50, but that's a slightly different story).

Fitness coach and ATHLEAN-X founder Jeff Cavaliere explained how to effectively build muscle over 40 years old without using ...

Working out over age 40 may require a different fitness approach due to hormonal and physical shifts in the body. Fitness experts explain what should change for best results.