Metabolic cost of level,uphill,and downhill running in highly cushioned shoes with carbon-fiber plates  

作　　者：Clarissa S.Whiting Wouter Hoogkamer Rodger Kram 

机构地区：[1]Locomotion Laboratory,Department of Integrative Physiology,University of Colorado,Boulder,CO 80309,USA [2]Integrative Locomotion Lab,Department of Kinesiology,University of Massachusetts,Amherst,MA 01003,USA

出　　处：《Journal of Sport and Health Science》2022年第3期303-308,共6页运动与健康科学（英文）

基　　金：We thank Jackson Brill,Ross Wilkinson,Kyle Sterns,and James Tripp Hurt for help with recruiting and testing and Alena Grabowski for loaning us her Parvo system while ours was on the fritz.The running shoes used for this study were provided by Nike.

摘　　要：Background:Compared to conventional racing shoes,Nike Vaporfly 4% running shoes reduce the metabolic cost of level treadmill running by4%.The reduction is attributed to their lightweight,highly compliant,and resilient midsole foam and a midsole-embedded curved carbon-fiber plate.We investigated whether these shoes also could reduce the metabolic cost of moderate uphill(+3°) and downhill(-3°) grades.We tested the null hypothesis that,compared to conventional racing shoes,highly cushioned shoes with carbon-fiber plates would impart the same ~4%metabolic power(W/kg) savings during uphill and downhill running as they do during level running.Methods:After familiarization,16 competitive male runners performed six 5-min trials(2 shoes × 3 grades) in 2 Nike marathon racing-shoe models(Streak 6 and Vaporfly 4%) on a level,uphill(+3°),and downhill(-3°) treadmill at 13 km/h(3.61 m/s).We measured submaximal oxygen uptake and carbon dioxide production during Minutes 4-5 and calculated metabolic power(W/kg) for each shoe model and grade combination.Results:Compared to the conventional shoes(Streak 6),the metabolic power in the Vaporfly 4% shoes was 3.83%(level),2.82%(uphill),and2.70%(downhill)less(all p <0.001).The percent of change in metabolic power for uphill running was less compared to level running(p=0.04;effect size(ES)=0.561) but was not statistically different between downhill and level running(p=0.17;ES=0.356).Conclusion:On a running course with uphill and downhill sections,the metabolic savings and hence performance enhancement provided by Vaporfly 4% shoes would likely be slightly less overall,compared to the savings on a perfectly level race course.

关 键 词：ENERGETICS INCLINE Locomotion Oxygen consumption Running economy 

分 类 号：G822[文化科学—体育训练]