Muniz-Pumares Daniel, Pedlar Charles, Godfrey Richard, Glaister Mark
a School of Sport, Health and Applied Science , St Mary's University , Twickenham , UK.
b Department of Psychology and Sport Science, School of Life and Medical Sciences , University of Hertfordshire , Hatfield , UK.
J Sports Sci. 2017 Dec;35(23):2357-2364. doi: 10.1080/02640414.2016.1267386. Epub 2016 Dec 26.
This study investigated (i) whether the accumulated oxygen deficit (AOD) and curvature constant of the power-duration relationship (W') are different during constant work-rate to exhaustion (CWR) and 3-min all-out (3MT) tests and (ii) the relationship between AOD and W' during CWR and 3MT. Twenty-one male cyclists (age: 40 ± 6 years; maximal oxygen uptake [V̇O]: 58 ± 7 ml · kg · min) completed preliminary tests to determine the V̇O-power output relationship and V̇O. Subsequently, AOD and W' were determined as the difference between oxygen demand and oxygen uptake and work completed above critical power, respectively, in CWR and 3MT. There were no differences between tests for duration, work, or average power output (P ≥ 0.05). AOD was greater in the CWR test (4.18 ± 0.95 vs. 3.68 ± 0.98 L; P = 0.004), whereas W' was greater in 3MT (9.55 ± 4.00 vs. 11.37 ± 3.84 kJ; P = 0.010). AOD and W' were significantly correlated in both CWR (P < 0.001, r = 0.654) and 3MT (P < 0.001, r = 0.654). In conclusion, despite positive correlations between AOD and W' in CWR and 3MT, between-test differences in the magnitude of AOD and W', suggest that both measures have different underpinning mechanisms.
（i）在恒定工作速率至力竭（CWR）测试和3分钟全力（3MT）测试期间，累积氧亏（AOD）和功率-持续时间关系的曲率常数（W'）是否存在差异；以及（ii）CWR和3MT期间AOD与W'之间的关系。21名男性自行车运动员（年龄：40±6岁；最大摄氧量[V̇O₂]：58±7 ml·kg⁻¹·min⁻¹）完成了初步测试，以确定V̇O₂-功率输出关系和V̇O₂。随后，分别在CWR和3MT中，将AOD和W'确定为氧需求与摄氧量之间的差值以及高于临界功率完成的功。在持续时间、功或平均功率输出方面，测试之间没有差异（P≥0.05）。CWR测试中的AOD更大（4.18±0.95 vs. 3.68±0.98 L；P = 0.004），而3MT中的W'更大（9.55±4.00 vs. 11.37±3.84 kJ；P = 0.010）。在CWR（P < 0.001，r = 0.654）和3MT（P < 0.001，r = 0.654）中，AOD和W'均显著相关。总之，尽管CWR和3MT中AOD与W'之间存在正相关，但AOD和W'大小的测试间差异表明这两种测量方法具有不同的潜在机制。
