Dotson C O, Caprarola M A
Br J Sports Med. 1984 Sep;18(3):191-4. doi: 10.1136/bjsm.18.3.191.
This study investigated the predictability of maximal oxygen intake from three different submaximal heart rates assessed during an initial and follow-up ride on a cycle ergometer. Twenty-four healthy male subjects performed workloads of 600, 750, and 900 kpm's for six minutes on each of two visits to the laboratory. Analysis of variance for a randomised complete blocks design, with subjects constituting blocks, was used to analyse heart rate, estimated maximal oxygen intake, and residual estimated maximal oxygen intake variations among the experimental conditions. Relationships between the actual and estimated maximal oxygen intakes were determined using the Pearson Product-Moment formula of correlation. The average estimated maximal oxygen intake was significantly increased from the first testing occasion to the second. Although errors of estimation decreased significantly (450 ml to 366 ml) in favour of the second testing condition, the decrease was neither consistent with workloads nor subjects. The correlation coefficients were consistently low at 600 kpm for both testing occasions (0.68 and 0.73, respectively), consistently high at 750 kpm (0.82 and 0.84, respectively), and quite variable at 900 kpm (0.71 and 0.84, respectively), indicated that the validity of the nomogram was not consistent with all workloads or testing occasions. Despite these inconsistencies, the nomogram is, for practical purposes, a valid predictor of maximal oxygen consumption.
本研究调查了在初次和后续的自行车测力计骑行过程中评估的三种不同次最大心率对最大摄氧量的预测能力。24名健康男性受试者在两次前往实验室的过程中，每次都以600、750和900千帕米的工作量进行6分钟的运动。采用以受试者为区组的随机完全区组设计方差分析，来分析实验条件中心率、估计最大摄氧量和剩余估计最大摄氧量的变化。使用皮尔逊积差相关公式确定实际最大摄氧量与估计最大摄氧量之间的关系。从第一次测试到第二次测试，平均估计最大摄氧量显著增加。虽然估计误差显著降低（从450毫升降至366毫升），有利于第二次测试条件，但这种降低既与工作量无关，也与受试者无关。两次测试中，600千帕米时的相关系数始终较低（分别为0.68和0.73），750千帕米时始终较高（分别为0.82和0.84），900千帕米时变化较大（分别为0.71和0.84），这表明列线图的有效性在所有工作量或测试场合下并不一致。尽管存在这些不一致之处，但从实际应用的角度来看，列线图仍是最大耗氧量的有效预测指标。
