Immersible ergocycle prescription as a function of relative exercise intensity  

作　　者：Mauricio Garzon Mathieu Gayda Anil Nigam Alain-Steve Comtois Martin Juneau 

机构地区：[1]Cardiovascular Prevention and Rehabilitation Centre (EPIC), Montreal Heart Institute and University of Montreal, Montreal, Quebec, HIT 1N6, Canada [2]Research Center, Montreal Heart Institute and University of Montreal, Montreal, Quebec, H1T 1C8, Canada [3]Department of Kinesiology, University of Monireal Montreal, Quebec, H3T 1J4, Canada [4]Department of Medicine, University of Montreal, Montreal, Quebec, H3T 1J4, Canada [5]Kinanthropology Department, University of Quebec in Montreal (UQAM), Montreal, Quebec, H2X 1Y4, Canada

出　　处：《Journal of Sport and Health Science》2017年第2期219-224,共6页运动与健康科学（英文）

基　　金：provided by the éPIC Foundation and the Montreal Heart Institute Foundation

摘　　要：Purpose: The purpose of this study was to establish the relationship between various expressions of relative exercise intensity percentage of maximal oxygen uptake(%VO_(2max)), percentage of maximal heart rate(%HR_(max)), %VO_2 reserve(%VO_2R), and %HR reserve(%HRR)) in order to obtain the more appropriate method for exercise intensity prescription when using an immersible ergocycle(IE) and to propose a prediction equation to estimate oxygen consumption(VO_2) based on IE pedaling rate(rpm) for an individualized exercise training prescription.Methods: Thirty-three healthy participants performed incremental exercise tests on IE and dryland ergocycle(DE) at equal external power output(Pext). Exercise on IE began at 40 rpm and was increased by 10 rpm until exhaustion. Exercise on DE began with an initial load of 25 W and increased by 25 W/min until exhaustion. VO_2 was measured with a portable gas analyzer(COSMED K4b^2) during both incremental tests. On IE and DE, %VO_2R, %HRmax, and %HRR at equal Pext did not differ(p > 0.05).Results: The %HRR vs. %VO_2R regression for both IE and DE did not differ from the identity line %VO_2R IE = 0.99 × HRR IE(%) + 0.01(r^2= 0.91, SEE = 11%); %VO_2R DE = 0.94 × HRR DE(%) + 0.01(r^2= 0.94, SEE = 8%). Similar mean values for %HRmax, %VO_2R, and %HRR at equal Pext were observed on IE and DE. Predicted VO_2 obtained according to rpm on IE is represented by: VO_2(L/min) = 0.000542 × rpm2-0.026 × rpm + 0.739(r = 0.91, SEE = 0.319 L/min).Conclusion: The %HRR–%VO_2R relationship appears to be the most accurate for exercise training prescription on IE. This study offers new tools to better prescribe, control, and individualize exercise intensity on IE.Purpose： The purpose of this study was to establish the relationship between various expressions of relative exercise intensity percentage of maximal oxygen uptake（%VO2max）, percentage of maximal heart rate（%HRmax）, %VO2 reserve（%VO2R）, and %HR reserve（%HRR）） in order to obtain the more appropriate method for exercise intensity prescription when using an immersible ergocycle（IE） and to propose a prediction equation to estimate oxygen consumption（VO2） based on IE pedaling rate（rpm） for an individualized exercise training prescription.Methods： Thirty-three healthy participants performed incremental exercise tests on IE and dryland ergocycle（DE） at equal external power output（Pext）. Exercise on IE began at 40 rpm and was increased by 10 rpm until exhaustion. Exercise on DE began with an initial load of 25 W and increased by 25 W/min until exhaustion. VO2 was measured with a portable gas analyzer（COSMED K4b^2） during both incremental tests. On IE and DE, %VO2R, %HRmax, and %HRR at equal Pext did not differ（p 〉 0.05）.Results： The %HRR vs. %VO2R regression for both IE and DE did not differ from the identity line %VO2R IE = 0.99 × HRR IE（%） ＋ 0.01（r^2= 0.91, SEE = 11%）; %VO2R DE = 0.94 × HRR DE（%） ＋ 0.01（r^2= 0.94, SEE = 8%）. Similar mean values for %HRmax, %VO2R, and %HRR at equal Pext were observed on IE and DE. Predicted VO2 obtained according to rpm on IE is represented by： VO2（L/min） = 0.000542 × rpm^2-0.026 × rpm ＋ 0.739（r = 0.91, SEE = 0.319 L/min）.Conclusion： The %HRR-%VO2R relationship appears to be the most accurate for exercise training prescription on IE. This study offers new tools to better prescribe, control, and individualize exercise intensity on IE.

关 键 词：Exercise prescription Heart rate Immersed ergocycle Oxygen uptake Pedaling rate 

分 类 号：G804.2[文化科学—运动人体科学]