Int J Sports Med 2010; 31(8): 567-571
DOI: 10.1055/s-0030-1254136
Training & Testing

© Georg Thieme Verlag KG Stuttgart · New York

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

L. Dalleck1 , T. T. Bushman2 , R. D. Crain2 , M. M. Gajda2 , E. M. Koger2 , L. A. Derksen2
  • 1Minnesota State University, Mankato, Human Performance, Mankato, United States
  • 2University of Wisconsin-Eau Claire, Kinesiology, United States
Further Information

Publication History

accepted after revision April 27, 2010

Publication Date:
09 June 2010 (online)

Abstract

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, VO2max – 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 (% VO2max) 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 (%VO2max) 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.

References

Correspondence

Dr. Lance Dalleck

Minnesota State University

Mankato, Human Performance

1400 Highland Center

56001 Mankato

United States

Phone: +1/507/389 6715

Fax: +1/507/389 4084

Email: lance.dalleck@mnsu.edu

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