| Autor: |
Bode VG; Department of Kinesiology, University of New Hampshire, Durham, NH, USA., Croce RV; Department of Kinesiology, University of New Hampshire, Durham, NH, USA., Quinn TJ; Department of Kinesiology, University of New Hampshire, Durham, NH, USA., Laroche DP; Department of Kinesiology, University of New Hampshire, Durham, NH, USA. |
| Jazyk: |
angličtina |
| Zdroj: |
European journal of sport science [Eur J Sport Sci] 2020 May; Vol. 20 (4), pp. 477-485. Date of Electronic Publication: 2019 Aug 12. |
| DOI: |
10.1080/17461391.2019.1652350 |
| Abstrakt: |
The purpose was to test whether lower-extremity vertical stiffness and gait mechanics explain differences in energy cost of walking (Cw) between individuals with normal weight (NW) and obesity (OB). Ten OB (33.1 ± 2.0 kg m -2 ) and 10 NW (24.2 ± 1.3 kg m -2 ) walked for six minutes on an instrumented treadmill at 1.25 m s -1 while Cw, lower-extremity kinematics, and vertical stiffness ( K vert ) were measured. NW completed another trial with a loaded vest (NWL) to simulate the BMI of the obese group. Cw was 24% greater in OB (277.5 ± 45.3 J m -1 ) and 23% greater in NWL (272.7 ± 35.7 J m -1 ) than NW (211.0 ± 27.0 J m -1 , P < 0.005). Mass-specific Cw (Cw kg ) wasn't different between conditions ( P = 0.085). Lower-extremity K vert was 40% higher in OB (32.7 ± 5.2 kN m -1 ) than NW (23.3 ± 4.7 kN m -1 , P < 0.001), but neither was different from NWL (27.5 ± 3.4 kN m -1 , P > 0.05). Mass-specific K vert ( P = 0.081) was similar across conditions. K vert was related to Cw ( r = 0.55, P = 0.001). Cw kg wasn't different between NW or OB, but there was a negative correlation between BMI and Cw kg driven by lower Cw kg in NWL. Cw and K vert covaried in proportion to body mass, but mass-specific K vert was unrelated to Cw kg . Mass-specific K vert was lower in NWL than OB due to NWL's greater angle of attack, center of mass displacement, and joint range of motion. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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