Cardiorespiratory fitness (CRF) is considered a foundation for good health and longevity. The variable, VO2max, is considered a reliable measure of cardiorespiratory health. The measurement of VO2max is stressful and ...Cardiorespiratory fitness (CRF) is considered a foundation for good health and longevity. The variable, VO2max, is considered a reliable measure of cardiorespiratory health. The measurement of VO2max is stressful and is not a common practice, thus, it is desirable to relate VO2max to other variables including age, gender, Body Mass Index (BMI), body fat percentage (BFP), and physical activity. Mathematical models are presented to relate VO2max to age, gender, BMI, body fat percentage, and aerobic exercise. Predictions match well with measured VO2max data published in the literature. The robust models are stable for all boundary conditions including young adults to old age and lower sedentary to Olympic-trained levels of relative fitness for both male and female applications. The relationship may be especially helpful for older people who are dealing with elevated values of BMI. The models build on two levels of relative fitness (sedentary and endurance-trained) and boundary conditions of Olympic-trained athletes and lower sedentary conditions. Thus, the model responds to a full range of fitness conditions. Four equations are provided: one with relative fitness related to distance walked or ran each week, one using BMI to estimate relative fitness, and two using both BMI and BFP to estimate relative fitness (one interacting with age). An equation is also provided to evaluate the dynamic change in relative fitness using input of distance walked or ran each day, which can be estimated by a smart watch. The equation that only uses age, gender, and BMI as inputs overestimates VO2max for people with low BMI and who are physically inactive. This weakness is partially overcome by adding BFP as a variable when available. The most accurate equation is the one that uses distance walked or ran each day to estimate relative fitness based on the individual’s physical activity. Unfortunately, this method requires the individual to keep track of their physical activity daily. Relative fitness may be a more appropriate variable than VO2max to indicate fitness because it is independent of age.展开更多
The purpose of this study was to investigate whether eight weeks of aerobic high-intensity interval training with roller ski is effective in cross-country skiers. 10 male （age, 18.28 ± 2.1 years; height, 171.26 ...The purpose of this study was to investigate whether eight weeks of aerobic high-intensity interval training with roller ski is effective in cross-country skiers. 10 male （age, 18.28 ± 2.1 years; height, 171.26 ± 4.12 cm; weight 61.39 ± 6.28 kg） and 8 female （age, 16.05 ± 0.3 years; height, 158.3 ± 6.47 cm; weight, 49.34 ± 0.7 kg） junior cross country skiers completed the study. All skiers performed a 2 × 2-kin all-out uphill intervals with roller-skis, 3 times a week, in addition to their traditional training program. Measurements included VO2max （maximal oxygen uptake）, anaerobic power, and also for 2-km roller ski. All values were listed as pre-to post-test mean （± SD）, significant level, and percentage changes （%）. Pre-to post-testing changes in VO2max, anaerobic power, and also 2-kin roller ski performance were significantly higher during all post-test trials in all groups （P 〈 0.005）. With reference to the training effects found in our study, we suggest that the skiers should integrate the roller ski aerobic high-intensity interval uphill models in their training programs for improving performance.展开更多
目的:跑台、功率自行车和手摇功率计测量游泳运动员VO_(2max),对比分析三种测试方法。方法:34名游泳运动员分别用三种方法测试VO_(2max),对测试的VO_(2max)进行Paired-Samples T Test和Pearson相关性分析。结果:跑台、功率自行车和手摇...目的:跑台、功率自行车和手摇功率计测量游泳运动员VO_(2max),对比分析三种测试方法。方法:34名游泳运动员分别用三种方法测试VO_(2max),对测试的VO_(2max)进行Paired-Samples T Test和Pearson相关性分析。结果:跑台、功率自行车和手摇功率计测试VO_(2max)均值分别为4914.6±789.91、4424.2±560.85、2859.2±347.52ml·omin-1。跑台-功率自行车、跑台-手摇功率计、功率自行车-手摇功率计配对t检验,p值为0.000、0.007、0.004。Pearson相关分析,跑台-功率自行车(r=0.920,P<0.001);跑台-手摇功率计(r=0.754,P<0.05);功率自行车-手摇功率计(r=0.801,P<0.01)。结论:三种方法两-两间高度相关,均可用来测量游泳运动员的最大摄氧量,跑台和功率自行车相关度最高,建议首选跑台、其次功率自行车。展开更多
文摘Cardiorespiratory fitness (CRF) is considered a foundation for good health and longevity. The variable, VO2max, is considered a reliable measure of cardiorespiratory health. The measurement of VO2max is stressful and is not a common practice, thus, it is desirable to relate VO2max to other variables including age, gender, Body Mass Index (BMI), body fat percentage (BFP), and physical activity. Mathematical models are presented to relate VO2max to age, gender, BMI, body fat percentage, and aerobic exercise. Predictions match well with measured VO2max data published in the literature. The robust models are stable for all boundary conditions including young adults to old age and lower sedentary to Olympic-trained levels of relative fitness for both male and female applications. The relationship may be especially helpful for older people who are dealing with elevated values of BMI. The models build on two levels of relative fitness (sedentary and endurance-trained) and boundary conditions of Olympic-trained athletes and lower sedentary conditions. Thus, the model responds to a full range of fitness conditions. Four equations are provided: one with relative fitness related to distance walked or ran each week, one using BMI to estimate relative fitness, and two using both BMI and BFP to estimate relative fitness (one interacting with age). An equation is also provided to evaluate the dynamic change in relative fitness using input of distance walked or ran each day, which can be estimated by a smart watch. The equation that only uses age, gender, and BMI as inputs overestimates VO2max for people with low BMI and who are physically inactive. This weakness is partially overcome by adding BFP as a variable when available. The most accurate equation is the one that uses distance walked or ran each day to estimate relative fitness based on the individual’s physical activity. Unfortunately, this method requires the individual to keep track of their physical activity daily. Relative fitness may be a more appropriate variable than VO2max to indicate fitness because it is independent of age.
文摘The purpose of this study was to investigate whether eight weeks of aerobic high-intensity interval training with roller ski is effective in cross-country skiers. 10 male （age, 18.28 ± 2.1 years; height, 171.26 ± 4.12 cm; weight 61.39 ± 6.28 kg） and 8 female （age, 16.05 ± 0.3 years; height, 158.3 ± 6.47 cm; weight, 49.34 ± 0.7 kg） junior cross country skiers completed the study. All skiers performed a 2 × 2-kin all-out uphill intervals with roller-skis, 3 times a week, in addition to their traditional training program. Measurements included VO2max （maximal oxygen uptake）, anaerobic power, and also for 2-km roller ski. All values were listed as pre-to post-test mean （± SD）, significant level, and percentage changes （%）. Pre-to post-testing changes in VO2max, anaerobic power, and also 2-kin roller ski performance were significantly higher during all post-test trials in all groups （P 〈 0.005）. With reference to the training effects found in our study, we suggest that the skiers should integrate the roller ski aerobic high-intensity interval uphill models in their training programs for improving performance.
文摘目的:跑台、功率自行车和手摇功率计测量游泳运动员VO_(2max),对比分析三种测试方法。方法:34名游泳运动员分别用三种方法测试VO_(2max),对测试的VO_(2max)进行Paired-Samples T Test和Pearson相关性分析。结果:跑台、功率自行车和手摇功率计测试VO_(2max)均值分别为4914.6±789.91、4424.2±560.85、2859.2±347.52ml·omin-1。跑台-功率自行车、跑台-手摇功率计、功率自行车-手摇功率计配对t检验,p值为0.000、0.007、0.004。Pearson相关分析,跑台-功率自行车(r=0.920,P<0.001);跑台-手摇功率计(r=0.754,P<0.05);功率自行车-手摇功率计(r=0.801,P<0.01)。结论:三种方法两-两间高度相关,均可用来测量游泳运动员的最大摄氧量,跑台和功率自行车相关度最高,建议首选跑台、其次功率自行车。
