Dose-Response Relationship Between Interval Training Frequency and Magnitude of Improvement in Lactate Threshold

作者：Dalleck L^*; Bushman T T; Crain R D; Gajda M M; Koger E M; Derksen L A

来源：International Journal of Sports Medicine, 2010, 31(8): 567-571.

DOI：10.1055/s-0030-1254136

• maximal lactate steady state
• anaerobic threshold
• endurance performance
• maximal oxygen uptake
• training intensity

The purpose of this study was to determine if interval training at 110-120% of peak power output one and two days/wk in addition to habitual training would elicit improvements in lactate threshold (LT) in a dose response manner. Twenty physically active individuals completed this study: age - 21.1 +/- 1.3 yr, height - 172.1 +/- 7.4 cm, body mass - 68.4 +/- 9.1 kg, VO(2)max - 45.3 +/- 5.2 mL/kg/min; and were randomly assigned into two separate 6 wk training groups - either 1 day/wk interval training or 2 days/wk interval training at 110-120% of peak workload (from an incremental exercise test) on a cycle ergometer. After 6 wk, LT (% VO(2)max) increased significantly (p < 0.05) in both 1 day/wk (4.3 +/- 3.2%) and 2 days/wk (8.2 +/- 2.6%) groups. A two-factor mixed ANOVA identified a significant interaction between exercise frequency and LT (%VO(2)max) values (p < 0.05) indicating that LT responded differently to 1 day/wk and 2 days/wk of interval training. Findings from the present study show high-intensity, interval training to be a successful strategy for modifying this important metabolic threshold. Moreover, results suggest that there is a dose-response relationship between frequency of interval training and the magnitude of LT improvement.

• 出版日期2010-8