ArticleFrontiers in physiology2026
Phase angle identifies a muscle quality phenotype associated with physical performance in U.S. marines.
Article in Frontiers in physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
Objective: To evaluate whether phase angle (PhA) provides physiological information beyond DXA-derived body composition for explaining physical performance in active-duty U.S. Marines. Methods: We analyzed data from 2,177 active-duty U.S. Marines with bioelectrical impedance analysis, dual-energy X-ray absorptiometry (DXA), and standardized physical performance testing. Phase angle was expressed in degrees and standardized within sex to define Phase Angle Muscle Quality (PhA-MQ) quartiles. Outcomes included Physical Fitness Test (PFT), Combat Fitness Test (CFT), estimated VO Results: Physical performance increased progressively across PhA-MQ quartiles, with the greatest separation observed for lean-mass-normalized outcomes. Across PhA quartiles, mean PFT scores increased from 236 to 271 points; while CFT scores increased from 240 to 272 points. In adjusted models, PhA remained independently associated with PFT (ΔR Conclusions: Phase angle identifies a physiological phenotype associated with enhanced physical performance independent of DXA-derived body composition. These findings support phase angle as a marker of muscle quality-related physiological status rather than a direct measure of muscle quality.
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