Library.

“A resistance-training program consisting only of front squats, Romanian deadlifts, incline bench press, and pull-ups can maintain overall muscle mass (hypertrophy) in healthy adults when performed with adequate training volume and progressive overload.”

A four-lift program like this can likely preserve a large share of muscle mass if effort, volume, and progression are sufficient, but the evidence does not show that it reliably maintains all major muscle groups on its own. The cited research supports compound training and progressive overload in general, not this exact exercise-only template. Muscles such as calves, lateral/rear delts, and some arm regions may need more direct work.

“As of May 4, 2026, resistance training performed at longer muscle lengths with greater training volume is more likely to produce greater skeletal muscle hypertrophy than resistance training performed at shorter muscle lengths and/or with lower training volume.”

Current evidence supports the overall direction of this claim, but not with equal certainty for both parts. Greater training volume is a well-established driver of hypertrophy, while training at longer muscle lengths appears beneficial on average yet usually by small margins and with some conflicting review-level evidence. The volume effect is strong; the muscle-length effect is modest and still debated.