Relationships of Muscle Echo Intensity with Walking Ability and Physical Activity in the Very Old Population.
This study investigated the relationships between muscle echo intensity (EI), physical activity (PA), and functional mobility in 108 Japanese (88-92 years). We measured EI and muscle thickness (MT) at the midpoint of the anterior superior iliac spine and patella using B-mode ultrasound. Light and moderate-to-vigorous PA (LPA and MVPA) were assessed with a triaxial accelerometer. The timed up and go (TUG) test was used to measure for functional mobility. EI, but not MT, was significantly associated with both TUG scores (β = 0.17, p = .047) and MVPA (β = -0.31, p = .01) when adjusted by potential confounders. However, association between EI and TUG disappeared after adjusted for MVPA. Meanwhile, MVPA was significantly associated with TUG scores independent of EI (β = -0.35, p < .001). Although EI of anterior thigh muscles might be a weaker predictor of functional morbidity than MVPA, it is a noninvasive and practical approach for assessing muscle quality in the very old.
Yusuke
Y
Osawa
Yasumichi
Y
Arai
Yuko
Y
Oguma
Takumi
T
Hirata
Yukiko
Y
Abe
Koichiro
K
Azuma
Michiyo
M
Takayama
Nobuyoshi
N
Hirose
D061725:Accelerometry; D000369:Aged, 80 and over; D001415:Back; D003430:Cross-Sectional Studies; D015444:Exercise / Q000502:physiology*; D005260:Female; D015577:Geriatric Assessment; D006801:Humans; D057187:Independent Living; D007564:Japan; D008297:Male; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging*; D013848:Thigh; D016138:Walking / Q000502:physiology*
accelerometer; aged; echo intensity; independent living; physical activity; timed up and go test; ultrasound