We investigated whether central and/or peripheral arterial stiffness contributes to increased perceived fatigue during walking in mobility-intact older adults. Arterial stiffness of the common carotid artery and superficial femoral artery (SFA) was measured using Doppler-ultrasound in 45 community-dwelling women and men. The change in perceived fatigue was measured after a fast-pace 400 meter walk test. Adults that rated feeling more tired after walking (n=10) had higher SFA stiffness (p<0.05), but not carotid stiffness, than adults that reported feeling more energetic after walking (n=22). The perceived fatigue rating was normalized to energy expenditure during walking to determine fatigability. Adults were divided into tertiles (n=15) based on the fatigability score. Carotid and SFA stiffness was elevated in the highest fatigability tertile as compared to the lowest tertile (p<0.05). After adjusting for age, sex, body fat, mean blood pressure, daily physical activity levels,
|State||Published - Jan 1 2015|
Gonzales, J., Wiberg, M., Defferari, E., & Proctor, D. N. (2015). Arterial stiffness is higher in older adults with increased perceived fatigue and fatigability during walking. Experimental Gerontology, 92-97.