Department of Kinesiology and Health Promotion, University of Kentucky, Lexington, Kentucky; and.
Kinesiology Department, University of Wisconsin Oshkosh, Oshkosh, Wisconsin.
J Strength Cond Res. 2021 Jan 1;35(1):97-101. doi: 10.1519/JSC.0000000000002555.
Byrd, MT, Wallace, BJ, Clasey, JL, and Bergstrom, HC. Contributions of lower-body strength parameters to critical power and anaerobic work capacity. J Strength Cond Res 35(1): 97-101, 2021-This study examined the contribution of lower-body strength and isokinetic peak torque measures to the prediction of critical power (CP) and anaerobic work capacity (AWC). Fourteen recreationally trained males (mean ± SD age: 22.4 ± 2.5 years; height: 177.9 ± 7.7 cm; body mass: 84.2 ± 12.4 kg) with anaerobic training experience participated in this study. The lower-body strength measures included 1 repetition max bilateral back squat (BSq), isokinetic peak torque at 30°·s-1 [PT30], and isokinetic peak torque at 240°·s-1 [PT240] of the dominant leg. The CP and AWC were determined from the 3-minute all-out CP cycle ergometer test (CP3MT), with the resistance set at 4.5% of the total body mass. The CP was defined as the mean power output over the final 30 seconds of the test, and the AWC was calculated using the equation, AWC = 150 seconds (P150 - CP), where P150 equals the mean power output for the first 150 seconds. Stepwise regression analyses indicated that only BSq contributed significantly to the prediction of AWC (AWC = 0.0527 [BSq] + 8.094 [standard error of estimate = 2.151 kJ; p = 0.012]), with a correlation of r2 = 0.423. None of the strength parameters significantly predicted CP. These findings indicated that BSq strength accounted for 42% of the variance in AWC, but lower-body strength was not related to CP. The current results indirectly support the unique metabolic characteristics of both CP and AWC in providing separate measures of an individual's aerobic and anaerobic capabilities, respectively.
拜德、华莱士、克拉西、伯格斯特龙。下肢力量参数对临界功率和无氧工作能力的贡献。J 力量与调节研究 35（1）：97-101，2021-本研究探讨了下肢力量和等速峰值扭矩测量值对临界功率（CP）和无氧工作能力（AWC）预测的贡献。14 名有过无氧训练经验的休闲训练男性（平均 ± 标准差年龄：22.4 ± 2.5 岁；身高：177.9 ± 7.7cm；体重：84.2 ± 12.4kg）参加了这项研究。下肢力量测量包括 1 次重复最大双侧深蹲（BSq）、优势腿 30°·s-1 等速峰值扭矩[PT30]和 240°·s-1 等速峰值扭矩[PT240]。CP 和 AWC 是从 3 分钟全力 CP 测功自行车测试（CP3MT）中确定的，阻力设定为总体重的 4.5%。CP 定义为测试最后 30 秒的平均功率输出，AWC 用公式计算，AWC=150 秒（P150-CP），其中 P150 等于前 150 秒的平均功率输出。逐步回归分析表明，只有 BSq 对 AWC 的预测有显著贡献（AWC=0.0527[BSq]+8.094[标准误差=2.151kJ；p=0.012]），相关系数 r2=0.423。没有一个力量参数显著预测 CP。这些发现表明，BSq 力量占 AWC 方差的 42%，但下肢力量与 CP 无关。目前的结果间接支持 CP 和 AWC 各自具有独特的代谢特征，分别为个体的有氧和无氧能力提供了独立的测量指标。
