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Int J Sports Med 2001; 22(3): 201-208
DOI: 10.1055/s-2001-16389
Training and Testing

© Georg Thieme Verlag Stuttgart · New York

Very Short (15 s - 15 s) Interval-Training Around the Critical Velocity Allows Middle-Aged Runners to Maintain V˙O2 max for 14 minutes

V. L. Billat1 , J. Slawinksi1 , V. Bocquet2 , P. Chassaing1 , A. Demarle1 , J. P. Koralsztein2
  • 1 Laboratoire d'étude de la motricité humaine, Université de Lille II, Faculté des Sciences du Sport, Ronchin, France
  • 2 Centre de Médecine du Sport C.C.A.S., Paris, France
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Publication History

Publication Date:
31 December 2001 (online)

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The purpose of this study was to compare the effectiveness of three very short interval training sessions (15 - 15 s of hard and easier runs) run at an average velocity equal to the critical velocity to elicit V˙O2 max for more than 10 minutes. We hypothesized that the interval with the smallest amplitude (defined as the ratio between the difference in velocity between the hard and the easy run divided by the average velocity and multiplied by 100) would be the most efficient to elicit V˙O2 max for the longer time. The subjects were middle-aged runners (52 ± 5 yr, V˙O2 max of 52.1 ± 6 mL × min-1 × kg-1, vV˙O2 max of 15.9 ± 1.8 km × h- 1, critical velocity of 85.6 ± 1.2 % vV˙O2 max) who were used to long slow distance-training rather than interval training. They performed three interval-training (IT) sessions on a synthetic track (400 m) whilst breathing through the COSMED K4b2 portable metabolic analyser. These three IT sessions were: A) 90 - 80 % vV˙O2 max (for hard bouts and active recovery periods, respectively), the amplitude = (90 - 80/85) 100 = 11 %, B) 100- 70 % vV˙O2 max amplitude = 35 %, and C) 60 × 110 % vV˙O2 max amplitude = 59 %. Interval training A and B allowed the athlete to spend twice the time at V˙O2 max (14 min vs. 7 min) compared to interval training C. Moreover, at the end of interval training A and B the runners had a lower blood lactate than after the procedure C (9 vs. 11 mmol × l-1). In conclusion, short interval-training of 15 s - 15 s at 90 - 80 and 100 - 70 % of vV˙O2 max proved to be the most efficient in stimulating the oxygen consumption to its highest level in healthy middle-aged long-distance runners used to doing only long slow distance-training.

Key words:

Intermittent-training, oxygen consumption, critical velocity.

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