Frangolias D D, Rhodes E C
School of Human Kinetics, University of British Columbia, Vancouver, Canada.
Med Sci Sports Exerc. 1995 Jul;27(7):1007-13. doi: 10.1249/00005768-199507000-00009.
This study compared the metabolic responses of 13 endurance runners, familiar with nonweight-bearing water immersion (WI) running, at ventilatory threshold (Tvent) and maximal effort (VO2max) for both treadmill and WI running performance. Oxygen consumption (VO2), ventilation (VE), heart-rate (HR), VE/VO2, respiratory exchange ratio (RER), perceived exertion (RPE), and stride frequency (SF) were measured at Tvent and VO2max. Paired t-tests revealed higher VO2max (59.7 vs 54.6 ml.kg.-1min-1), HRmax (190 vs 175 bpm), RERmax (1.20 vs 1.10), VO2 at Tvent (46.3 vs 42.8 ml.kg.-1min-1), HR at Tvent (165 vs 152 bpm) for treadmill versus WI running, respectively. Treadmill and WI VEmax (109.0 vs 105.8 l.min-1), RPEmax (20), VE at Tvent (66.4 vs 65.7 l.min-1), RER at Tvent (0.99 vs 0.98), RPE at Tvent (13 vs 12) were similar, as were blood lactate [BLa] values obtained at 30 s (10.4 vs 9.8 mmol.l-1) and 5 min (9.7 vs 9.2 mmol.l-1) post-test. SF values over time were higher on the treadmill. The lower WI VO2max with similar peak [BLa] and lower SF values suggests that the active musculature and muscle recruitment patterns differ in WI running due to the high viscosity friction of water, and the nonweight-bearing nature of WI running.
本研究比较了13名耐力跑者在跑步机和非负重水中跑步（WI）时，在通气阈值（Tvent）和最大运动强度（VO2max）下的代谢反应，这些跑者熟悉非负重水中跑步。在Tvent和VO2max时测量了耗氧量（VO2）、通气量（VE）、心率（HR）、VE/VO2、呼吸交换率（RER）、主观用力程度（RPE）和步频（SF）。配对t检验显示，跑步机跑步与WI跑步相比，VO2max更高（59.7对54.6 ml·kg⁻¹·min⁻¹）、HRmax更高（190对175次/分钟）、RERmax更高（1.20对1.10）、Tvent时的VO2更高（46.3对42.8 ml·kg⁻¹·min⁻¹）、Tvent时的HR更高（165对152次/分钟）。跑步机和WI的VEmax（109.0对105.8 l·min⁻¹）、RPEmax（20）、Tvent时的VE（66.4对65.7 l·min⁻¹）、Tvent时的RER（0.99对0.98）、Tvent时的RPE（13对12）相似，测试后30秒（10.4对9.8 mmol·L⁻¹）和5分钟（9.7对9.2 mmol·L⁻¹）时获得的血乳酸[BLa]值也相似。随着时间推移，跑步机上的SF值更高。WI的VO2max较低，同时峰值[BLa]相似且SF值较低，这表明由于水的高粘性摩擦以及WI跑步的非负重性质，WI跑步时的活跃肌肉组织和肌肉募集模式有所不同。
