Q: Okay, I’m moving into my late 40s, and I’m tired of all the joint pain from training heavy—shoulders, knees, hips. You name it! I’m from the lift-heavier-to-build-mass philosophy. But from all the research I’ve been seeing, it appears I don’t have to train very heavy at all to add plenty of muscle. I’m excited to try it, and I know you guys have been preaching about how these methods pack on mass for a while, but how should I start my transition?

A: No transition necessary. If you’re hurting that much, you should go right to the easy-to-follow 4X-style workouts. The relief—and new muscle gains—will amaze you (even younger guys should try a four-week all-4X phase for new growth)…

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