Wiley J P, Rhodes E C
Can J Appl Sport Sci. 1986 Mar;11(1):37-41.
This study investigated the relationship of individual anaerobic thresholds to oxygen debt. Anaerobic threshold speed (VTAM) was determined for 21 male university students using a continuous ramp treadmill protocol. The onset of anaerobiosis was determined by visual inspection of excess CO2 elimination. The following week, all subjects ran at the treadmill speed 3.3 m.sec-1 for 10 minutes (this speed split the group into two halves). Recovery oxygen consumption was monitored after this run. Application of double exponential equations by computer and subsequent integration was used to calculate total, alactic, and lactic oxygen debts. Subjects who ran above their VTAM (group L-VTAM) had significantly (p less than .05) higher total, lactic and alactic debts compared to subjects who ran below their VTAM (group H-VTAM). The total debt demonstrated a significant (p less than .05) negative correlation (r = .77) to VTAM in group L-VTAM. This appears to be due to increasing lactic debt, that was also significantly (p less than .05) negatively correlated (r = -.73) to VTAM. Group H-VTAM did not exhibit this characteristic. This study demonstrates that VTAM, as determined by excess CO2 elimination, is a critical factor in determining oxygen debt and therefore, work above this point (which results in the onset of metabolic acidosis) may limit the optimal running speed for a given distance.
本研究调查了个体无氧阈与氧债之间的关系。采用连续递增式跑步机方案，测定了21名男性大学生的无氧阈速度（VTAM）。通过目视观察过量二氧化碳的排出情况来确定无氧代谢的起始点。接下来的一周，所有受试者以3.3米/秒的跑步机速度跑10分钟（此速度将受试者分为两组）。此次跑步后监测恢复耗氧量。运用计算机应用双指数方程并随后进行积分，以计算总的、非乳酸和乳酸氧债。与低于其无氧阈速度跑步的受试者（H-VTAM组）相比，高于其无氧阈速度跑步的受试者（L-VTAM组）的总氧债、乳酸氧债和非乳酸氧债显著更高（p<0.05）。在L-VTAM组中，总氧债与无氧阈速度呈现显著的负相关（p<0.05，r = 0.77）。这似乎是由于乳酸氧债增加所致，乳酸氧债与无氧阈速度也显著负相关（p<0.05，r = -0.73）。H-VTAM组未表现出这一特征。本研究表明，通过过量二氧化碳排出所确定的无氧阈速度是决定氧债的关键因素，因此，高于此点的运动（这会导致代谢性酸中毒的发生）可能会限制给定距离内的最佳跑步速度。
