Ruben Chamorro

THE MUSCLE-BUILDING NARRATIVE after age 50 isn’t pretty. According to doomers online, your testosterone levels are falling, your energy levels are in massive decline, and everything seems to throw your back out.

But contrary to popular belief, you can still muscle up. And Bryan Krahn, 53 years old and as strong as he’s ever been, is proof. The trainer, who created MH’s Max Muscle at 50 workout program, still works out four or five days a week and has maintained a muscular 210-pound physique..

That doesn’t mean he trains exactly like he did when he was in his 20s. Instead, over the last three decades, he’s made a series of adjustments, shifting his fitness priorities (much less bench pressing) and experimenting with new gym ideas. All that trial-and-error helped Krahn develop these four critical post-50 training principles, which will allow you to push your muscle-building limits for decades to come without crushing your body.…