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Original articles  EXERCISE PHYSIOLOGY AND BIOMECHANICS 

The Journal of Sports Medicine and Physical Fitness 2005 December;45(4):441-51

Copyright © 2009 EDIZIONI MINERVA MEDICA

lingua: Inglese

Relationships and significance of lactate minimum, critical velocity, heart rate deflection and 3 000 m track-tests for running

Simões H. G. 1, Denadai B. S. 2, Baldissera V. 3, Campbell C. S. G. 1, Hill D. W. 4

1 Catholic University of Brasilia, Brasilia-DF, Brazil 2 Paulista State University – UNESP Rio Claro, Rio Claro-SP, Brazil 3 Federal University of São Carlos – UFSCar, São Carlos-SP, Brazil 4 University of North Texas, Denton, USA


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Aim. The running velocities associated to lactate minimum (Vlm), heart rate deflection (VHRd), critical velocity (CV), 3.000 m (V3000) and 10 000 m performance (V10km) were compared. Additionally the ability of Vlm and VHRd on identifying sustainable velocities was investigated.
Methods. Twenty runners (28.5±5.9 y) performed 1) 3 000 m running test for V3000; 2) an all-out 500 m sprint followed by 6×800 m incremental bouts with blood lactate ([lac]) measurements for Vlm; 3) a continuous velocity-incremented test with heart rate measurements at each 200 m for VHRd; 4) participants attempted to 30 min of endurance test both at Vlm(ETVlm) and VHRd(ETVHRd). Additionally, the distance-time and velocity-1/time relationships produced CV by 2 (500 m and 3 000 m) or 3 predictive trials (500 m, 3 000 m and distance reached before exhaustion during ETVHRd), and a 10 km race was recorded for V10km.
Results. The CV identified by different methods did not differ to each other. The results (m.min-1) revealed that Vlm (281±14.8)Conclusion. We evidenced that CV and Vlm track-protocols are valid for running evaluation and performance prediction and the parameters studied have different significance. The Vlm reflects the moderate-high intensity domain (below CV), can be sustained without [lac] accumulation and may be used for long-term exercise while the VHRd overestimates a running intensity that can be sustained for long-time. Additionally, V3000 and VHRd reflect the severe intensity domain (above CV)

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