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• W1994429166 abstract "Central fat, insulin resistance and physical inactivity are linked in a pathological positive feedback cycle leading to ever-increasing levels of visceral abdominal fat (VAF). Our ultimate goal is to interrupt this cycle by developing walking regimes for women of different ages and mass distributions that maximize calories burned while minimizing load-induced gait disturbances. PURPOSE: Our specific goal was to determine how the amount of mass carried around a woman's abdominal area (belly) affected her gait kinematics and metabolic cost during walking at different speeds. METHODS: We measured metabolic cost in 10 young females (mean=20.9yr) and 10 older females (mean=51.4yr) as they walked on a treadmill unloaded and belly-loaded (two loads, 8% and 16% of body mass) at four speeds (self-selected from eight options) centered around optimal walking speeds. For each individual, we developed cost of transport (CoT) equations (cost vs speed) for each of the three loading conditions and determined the minimum CoT (minCoT) and the speed of minCoT (SPminCoT) at each loading condition. Kinematic measures were determined from videotape (Kinematic Analysis program) using 5 strides from each trial. RESULTS: Both age cohorts showed the same pattern of significantly higher minCoT (p < 0.0001), lower SPminCoT, and lower stride frequency (p < 0.0001) as belly load increased. The shape of the metabolic cost vs speed curve was significantly (p<0.0001) more acute (higher costs above and below SPminCOT) for loads of 16% body mass than for the unloaded condition, yielding a decidedly smaller range of comfortable walking speeds for women with sizable belly loads. CONCLUSIONS: Our results show that the amount of centrally-located mass can influence the metabolic cost and kinematics of walking at a given speed, including the speed at which walking is least costly per distance. These findings will aid in developing individualized exercise prescriptions that could help women with significant visceral body fat maintain exercise levels that lower their risk for type 2 diabetes. Supported by NIH EARDA Grant G11HD039786 and the Center of Excellence for Women, Science, and Technology at the College of St. Catherine." @default.
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• W1994429166 date "2009-05-01" @default.
• W1994429166 modified "2023-09-27" @default.
• W1994429166 title "Belly Loads Influence Minimum Cost Of Transport And Speed It Occurs In Walking Women" @default.
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• W1994429166 doi "https://doi.org/10.1249/01.mss.0000354833.19871.f1" @default.
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