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ULTIMO FASCICOLOTHE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport

Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111

Periodicità: Mensile

ISSN 0022-4707

Online ISSN 1827-1928

 

The Journal of Sports Medicine and Physical Fitness 2013 Dicembre;53(6):588-95

EXCERCISE PHYSIOLOGY AND BIOMECHANICS 

 ORIGINAL ARTICLES

Maximal constant 45 min running velocity gives maximal lactate steady state

Vobejda C., Wortmann T., Zimmermann E.

University of Bielefeld, Institute of Sports Medicine, Bielefeld, Germany

Aim: The aim of the present study was to improve and confirm a time trial (TT) based method for determining anaerobic threshold (AnT) requiring minimal equipment.
Methods: Eighteen participants underwent three to five all-out TTs for at the most 60 min. Velocity of the TTs was adapted in 0.1 or 0.2 m*s-1 steps until maximal velocity maintainable for at least 45 min (Vmax45) was identified. Exercise was interrupted every 5 min in order to take blood samples. After the participants had finished their last TT blood lactate concentration (BLC) was determined to identify maximal lactate steady state (MLSS).
Results: Velocity, BLC and heart rate (HR) at the TTs giving MLSS (TTMLSS) and giving Vmax45 (TTVmax45) were almost identical (3.45±0.31 m*s-1 vs. 3.44±0.31 m*s-1, 4.46±1.28 mmol*L-1 vs. 4.52±1.28 mmol*L-1, 177±9.8 bpm vs. 178±9.4 bpm). Coefficient of correlation (R) and standard error of estimate (SEE) between velocity at MLSS (VMLSS) and Vmax45 were 0.96 and 0.09 m*s-1, respectively, indicating a very close relationship. Agreement between VMLSS and Vmax45 was also very high. At VMLSS cardiovascular drift (CVD) was 8.4±2.6 bpm from the 10th to 30th min. At Vmax45 CVD was 7.9±2.8 bpm from the 10th to 30th min and 11.2±3.8 bpm from the 10th to 45th min.
Conclusion: Determination of Vmax45 is a manageable, cost-saving and precise method for predicting velocity and CVD at MLSS in healthy, ambitious and at least moderately trained runners.

lingua: Inglese


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