Recent bone physiology research has identified a critical metabolic mechanism: when bone experiences mechanical loading, specialized bone-forming cells release osteocalcin, a hormone that directly improves insulin sensitivity and enhances glucose uptake by skeletal muscle. This three-organ pathway—bone, pancreas, and muscle—forms an integrated feedback system triggered by mechanical stress. The hormone-signaling cascade demonstrates that the skeleton is not merely a passive structural framework but an active participant in glucose regulation. Weight-bearing and resistance exercise activate this pathway more efficiently than aerobic activity, making mechanical loading a key metabolic intervention. This finding reshapes clinical understanding of how exercise improves metabolic health, positioning skeletal loading as a fundamental component of diabetes prevention and glucose control strategies.
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