Youth Program of National Natural Science Foundation of China（81801383）
Objective: To investigate the correlation of muscle thickness and pinnat angle measured by ultrasound with muscle mass, muscle strength and physical performance and to explore the utility of ultrasound in predicting sarcopenia in elderly women. Methods: A total of 168 elderly female physical examination personnel in the community were selected, anthropogenic parameters, muscle mass, grip strength, and body function were measured. The muscle thickness of forearm, rectus abdominis and lower limbs and the pinnate Angle of internal and external gastroculus were measured by ultrasound. Results: Some indicators show a trend of decreasing with age. The muscle thickness of posterior fibula was significantly correlated with limb skeletal muscle mass (RASM) .The muscle thickness preterior ulnar was significantly correlated with grip strength .The pinnate angle of the medial gastrocnemius muscle was correlated with step speed and body function.The anterior ulnar muscle thickness and pinnate angle of the medial gastrocnemius were significantly reduced in the elderly female with sarcopenia compare with those without sarcopenia. Conclusion: Preradial muscle thickness and pinnate angle of medial gastrectomy were strongly correlated with grip strength and body function respectively, and could be used as predictors of sarcopenia in elderly female; The muscle thickness of posterior fibula could be used to predict limb muscle mass inelderly wome.The application of ultrasound in evaluating muscle mass, muscle strength, body function and diagnosing sarcopenia is promising.