Viola Holbrook Human Performance Laboratory, Minnesota State University, Mankato, Mankato, MN.
Med Sci Sports Exerc. 2016 Feb;48(2):254-9. doi: 10.1249/MSS.0000000000000763.
The maximal oxygen uptake (VO2max) is deemed the highest predictor for all-cause mortality, and therefore, an ability to assess VO2max is important. The YMCA submaximal test is one of the most widely used tests to estimate VO2max; however, it has questionable validity.
We validated a customized submaximal test that accounts for the nonlinear rise in VO2 relative to power output and compared its accuracy against the YMCA protocol.
Fifty-six men and women performed a graded exercise test with a subsequent exhaustive, square wave bout for the verification of "true" VO2max. In counterbalanced order, subjects then completed the YMCA test and our new Mankato submaximal exercise test (MSET). The MSET consisted of a 3-min stage estimated at 35% VO2max and a second 3-min stage estimated at either 65% or 70% VO2max, where VO2max was estimated with a regression equation using sex, body mass index, age, and self-reported PA-R.
VO2 values from the graded exercise test and square wave verification bout did not differ with the highest value used to identify "true" VO2max (45.1 ± 8.89 mL · kg(-1) · min(-1)). The MSET (43.6 ± 8.6 mL · kg(-1) · min(-1)) did not differ from "true" VO2max, whereas the YMCA test (41.1 ± 9.6 mL · kg(-1) · min(-1)) yielded an underestimation (P = 0.002). The MSET was moderately correlated with "true" VO2max (ICC = 0.73, CV of 11.3%). The YMCA test was poorly correlated with "true" VO2max (ICC = 0.29, CV of 15.1%).
To our knowledge, this is the first study to examine submaximal exercise protocols versus a verified VO2max protocol. The MSET yielded better estimates of VO2max because of the protocol including a stage exceeding gas exchange threshold.
最大摄氧量（VO2max）被认为是全因死亡率的最高预测指标，因此，评估 VO2max 的能力很重要。基督教青年会亚极量测试是估计 VO2max 最广泛使用的测试之一；然而，它的有效性存在疑问。
我们验证了一种考虑到 VO2 相对于功率输出非线性增加的定制亚极量测试，并将其准确性与基督教青年会协议进行了比较。
56 名男性和女性进行了分级运动测试，随后进行了一项耗竭性的、方波冲刺测试，以验证“真实”VO2max。在平衡的顺序下，受试者随后完成了基督教青年会测试和我们新的曼卡托亚极量运动测试（MSET）。MSET 由一个估计为 35%VO2max 的 3 分钟阶段和另一个估计为 65%或 70%VO2max 的 3 分钟阶段组成，其中 VO2max 使用回归方程根据性别、体重指数、年龄和自我报告的 PA-R 进行估计。
分级运动测试和方波验证测试的 VO2 值与用于识别“真实”VO2max 的最高值没有差异（45.1±8.89mL·kg-1·min-1）。MSET（43.6±8.6mL·kg-1·min-1）与“真实”VO2max 没有差异，而基督教青年会测试（41.1±9.6mL·kg-1·min-1）则存在低估（P=0.002）。MSET 与“真实”VO2max 中度相关（ICC=0.73，变异系数为 11.3%）。基督教青年会测试与“真实”VO2max 相关性较差（ICC=0.29，变异系数为 15.1%）。
据我们所知，这是第一项检查亚极量运动测试与经验证的 VO2max 测试的研究。MSET 产生了更好的 VO2max 估计，因为该协议包括一个超过气体交换阈值的阶段。
