Accelerometer-determined Physical Activity And Lower Body Muscle Distribution In Japanese Women

• Published in: Medicine and science in sports and exercise Vol. 44; no. 5S; p. 812
• Main Authors: Mitsukawa, Naotoshi, Ogawa, Madoka, Loftin, Mark, Abe, Takashi
• Format: Journal Article
• Language: English
• Published: 01-05-2012
• ISSN: 0195-9131

To investigate the relationship between muscle distribution of lower body and accelerometer-determined daily physical activity. Fifty-one elderly women (mean age 66.0 [SD 7.1] yrs) volunteered. Muscle thickness (MTH) was measured by B-mode ultrasound at seven sites on the anterior (quadriceps [QF] 30%, 50%, and 70% of thigh length) and posterior (hamstring [HM] 50% and 70% of thigh length) aspects of the thigh and the anterior (tibialis anterior [TA] 30% of lower leg length) and posterior (triceps surae [TS] 30% of lower leg length) aspects of the lower leg. The daily step count and total duration times of light, moderate and vigorous exercise averaged 7826 (SD 3183) steps per day and 59 (SD 20), 22 (SD 17) and 2 (SD 2) min per day, respectively. Absolute MTH did not correlate (P>0.05) to limb length. Average daily step count was positively correlated with the TA-30% MTH (r=0.31, p=0.03) and TS-30% MTH (r=0.35, p=0.01), but not the MTH of the thigh.