Age-related site-specific muscle loss in the thigh and zigzag walking performance in older men and women

作者：Abe T^*; Loenneke J P; Thiebaud R S; Ogawa M; Mitsukawa N

来源：Acta Physiologica Hungarica, 2014, 101(4): 488-495.

DOI：10.1556/APhysiol.101.2014.006

• aging
• gait
• skeletal muscle mass
• ultrasound
• muscle strength

To investigate the relationships between site-specific muscle loss in the thigh, muscle quality and zigzag walking performance, 40 men and 41 women aged 65-79 years had muscle thickness (MTH) measured by ultrasound at nine sites on the anterior and posterior aspects of the body. Skeletal muscle mass (SM) was estimated from an ultrasound-derived prediction equation. Site-specific thigh sarcopenia was calculated using ultrasound-measured MTH at the anterior/posterior aspects of the thigh (AP-MTH ratio). Zigzag walking time (ZWT) and maximum isometric knee extension (KE) and flexion (KF) torques were measured. Muscle quality (torque/thigh SM) and knee joint strength index (torque/body mass) were calculated. There were no significant correlations between SM index and ZWT. However, AP-MTH ratio was inversely correlated (P %26lt; 0.05) to ZWT in men (r = -0.335) and women (r = -0.309). ZWT was also inversely correlated (P %26lt; 0.05) to KE-strength index in both sexes (men, r = -0.328; women, r = -0.372). Similarly, ZWT was correlated to KF-strength index (r = -0.497) and muscle quality (r = -0.322) in women, but not in men. After adjusting for age, height and body mass, AP-MTH ratio was inversely correlated to ZWT in men (r = -0.325) and tended to be correlated to ZWT in women (r = -0.263). Zigzag walking performance may be associated with site-specific thigh sarcopenia in older men and women.

• 出版日期2014-12