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Scientists Create 'Self-Exercising' Muscle Grafts That Benefit the Whole Body
Researchers in China have engineered living muscle grafts that continuously contract when implanted in mice, even without conscious movement. Derived from skeletal muscle stem cells, these grafts remained active for months, strengthening muscle and altering bone.
The American College of Sports Medicine (ACSM) published an updated framework for physical fitness in late August 2026, retiring the traditional health/performance divide. This new model, detailed in *Medicine & Science in Sports & Exercise*, unifies performance elements like agility and balance under "neuromotor fitness."
A new August 27, 2026, study found waist circumference is a more accurate predictor of mortality in older adults than Body Mass Index (BMI). This challenges BMI's traditional use, supporting the fitness industry's shift towards comprehensive body composition assessments.
The Bottom Line
Recent fitness science advancements point to more precise and personalized health strategies, from groundbreaking muscle regeneration to refined metrics and updated exercise frameworks.
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