当前位置： SCI文献检索 > EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY期刊下所有文献 > Effect of pedaling cadence on muscle oxygenation during high-intensity cycling until exhaustion: a comparison between untrained subjects and triathletes.

Effect of pedaling cadence on muscle oxygenation during high-intensity cycling until exhaustion: a comparison between untrained subjects and triathletes.

Abstract：

PURPOSE:The aim of this study was to compare the muscle oxygenation between trained and untrained subjects during heavy exercise until exhaustion at two extreme pedaling cadences using a NIRS system. METHODS:Nine untrained male subjects and nine male competitive triathletes cycled until exhaustion at an intensity corresponding to 90 % of the power output achieved at peak oxygen uptake at 40 and 100 rpm. Gas exchanges were measured breath-by-breath during each exercise. Muscle (de)oxygenation was monitored continuously by near-infrared spectroscopy on the Vastus Lateralis. RESULTS:Muscle deoxygenation (∆deoxy[Hb + Mb], i.e., O2 extraction) and ∆total[Hb + Mb] were significantly higher at 40 rpm compared to 100 rpm during the exercise in untrained subjects but not in triathletes (p < 0.05). The time performed until exhaustion was significantly higher at 40 than at 100 rpm in untrained subjects (373 ± 55 vs. 234 ± 37 s, respectively) but not in triathletes (339 ± 69 vs. 325 ± 66 s). CONCLUSIONS:These results indicate that high aerobic fitness (1) allows for better regulation between [Formula: see text]O2M and VO2M following the change in pedaling cadence, and (2) is the most important factor in the relationship between pedaling cadence and performance.

journal_name

Eur J Appl Physiol

journal_title

European journal of applied physiology

authors

Zorgati H,Collomp K,Boone J,Guimard A,Buttelli O,Mucci P,Amiot V,Prieur F

doi

10.1007/s00421-015-3235-4

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

2681-9

issue

12

eissn

1439-6319

issn

1439-6327

pii

10.1007/s00421-015-3235-4

journal_volume

115

pub_type

杂志文章

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