Walk into any commercial gym and you'll find the bench press crowded and the squat rack empty. Upper body training dominates most programs. But if you want to understand which half of your body has a greater impact on your long-term health, performance, hormones, and longevity — the science points clearly downward. ADVERTISEMENT
1. Your legs contain the largest muscles in your body, and large muscles drive metabolic rate. The quadriceps, hamstrings, and glutes are the three largest muscle groups you have.
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