Hill D W, Smith J C, Leuschel J L, Chasteen S D, Miller S A
Department of Kinesiology, University of North Texas, Denton, USA.
Int J Sports Med. 1995 Feb;16(2):82-7. doi: 10.1055/s-2007-972969.
The purpose of this study was to evaluate the effect of pedal cadence methodology on the relationship between power output and time to exhaustion. Twenty-four subjects each performed 12 all-out cycle ergometer tests (four at a constant 60 rpm, four at a constant 100 rpm, and four where they were allowed to select and, within each test, vary their cadence). The parameters of the hyperbolic power-time relationship, AWC (anaerobic work capacity) and CP (critical power), were estimated for each pedal cadence methodology using three regression models: nonlinear power-time, linear work-time, and linear power-time-1. In all cases, R2 was high and standard errors of the estimate of AWC and CP were low. With the two constant rpm methodologies, the estimates of AWC and CP were influenced by the choice of regression model. The estimates of AWC and CP were also influenced by the pedal cadence in the all-out tests. For example, the CP derived from the 100 rpm tests (mean +/- SD: 195 +/- 50 W) was lower (p < 0.05) than the CP from the other methodologies (207 +/- 50 W and 204 +/- 48 W), and the AWC from the variable cadence methodology (16.1 +/- 6.2 kJ) was greater than the AWC from constant rpm trials (14.5 +/- 5.9 kJ and 14.6 +/- 5.7 kJ). It is concluded that pedal cadence methodology influences the parameters of the power-time relationship.
本研究的目的是评估蹬踏节奏方法对功率输出与疲劳时间之间关系的影响。24名受试者每人进行了12次全力自行车测力计测试（4次以60转/分钟的恒定转速进行，4次以100转/分钟的恒定转速进行，4次受试者可自行选择并在每次测试中改变其转速）。使用三种回归模型：非线性功率-时间模型、线性功-时间模型和线性功率-时间-1模型，对每种蹬踏节奏方法估计双曲线功率-时间关系的参数、无氧工作能力（AWC）和临界功率（CP）。在所有情况下，R2都很高，AWC和CP估计值的标准误差都很低。采用两种恒定转速方法时，AWC和CP的估计值受回归模型选择的影响。AWC和CP的估计值在全力测试中也受蹬踏节奏的影响。例如，从100转/分钟测试得出的CP（平均值±标准差：195±50瓦）低于（P<0.05）其他方法得出的CP（207±50瓦和204±48瓦），可变节奏方法得出的AWC（16.1±6.2千焦）大于恒定转速试验得出的AWC（14.5±5.9千焦和14.6±5.7千焦）。得出的结论是，蹬踏节奏方法会影响功率-时间关系的参数。
