Seasonal changes in aerobic fitness indices in elite cyclists
Applied Physiology, Nutrition and Metabolism, ISSN: 1715-5312, Vol: 33, Issue: 4, Page: 735-742
2008
- 34Citations
- 119Captures
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Metrics Details
- Citations34
- Citation Indexes34
- 34
- CrossRef29
- Captures119
- Readers119
- 119
Article Description
The primary purpose of this study was to compare seasonal changes in cycling gross efficiency (GE) and economy (EC) with changes in other aerobic fitness indices. The secondary aim was to assess the relationship between maximum oxygen consumption, GE, and EC among elite cyclists. The relationships of maximum oxygen consumption with GE and EC were studied in 13 cyclists (8 professional road cyclists and 5 mountain bikers). Seasonal changes in GE and EC, predicted time to exhaustion (pTE), maximum oxygen consumption, and respiratory compensation point (RCP) were examined in a subgroup of 8 subjects, before (T) and after (TP) the pre-competitive winter training, and during the competitive period (T). GE and EC were assessed during a constant power test at 75% of peak power output (PPO). Significant main effect for time was found for maximum oxygen consumption (4.623 ± 0.675, 4.879 ± 0.727, and 5.010 ± 0.663 L·min; p = 0.028), PPO (417.8 ± 46.5, 443.0 ± 48.0, and 455 ± 48 W; p > 0.001), oxygen uptake at RCP (3.866 ± 0.793, 4.041 ± 0.685, and 4.143 ± 0.643 L·min ; p = 0.049), power output at RCP (330 ± 64, 354 ± 52, and 361 ± 50 W; p < 0.001), and pTE (17 ± 4, 30 ± 8, and 46 ± 17 min; p < 0.001). No significant main effect for time was found in GE (p = 0.097) or EC (p = 0.225), despite within-subject seasonal changes. No significant correlations were found between absolute maximum oxygen consumption and GE (r = -0.276; p = 0.359) or EC (r = -0.328; p = 0.272). However, cyclists with high maximum oxygen consumption values (i.e., over 80 mL·kg·min), showed low efficiency rates. Despite within-subject seasonal waves in cycling efficiency, changes in GE and EC should not be expected as direct consequence of changes in other maximal and submaximal parameters of aerobic fitness (i.e., maximum oxygen consumption and RCP). © 2008 NRC.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=48649101246&origin=inward; http://dx.doi.org/10.1139/h08-046; http://www.ncbi.nlm.nih.gov/pubmed/18641717; http://www.nrcresearchpress.com/doi/10.1139/H08-046; http://www.nrcresearchpress.com/doi/pdf/10.1139/H08-046; http://www.nrcresearchpress.com/doi/full-xml/10.1139/H08-046
Canadian Science Publishing
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