Journal article
The influence of blood removal on pacing during a 4-minute cycling time trial
International Journal of Sports Physiology and Performance, Vol.12(8), pp.1085-1092
2017
Abstract
Purpose: To examine the influence of manipulating aerobic contribution after whole-blood removal on pacing patterns, performance, and energy contribution during self-paced middle-distance cycling.
Methods: Seven male cyclists (33 +/- 8 y) completed an incremental cycling test followed 20 min later by a 4-min self-paced cycling time trial (4MMP) on 6 separate occasions over 42 d. The initial 2 sessions acted as familiarization and baseline testing, after which 470 mL of blood was removed, with the remaining sessions performed 24 h, 7 d, 21 d, and 42 d after blood removal. During all 4MMP trials, power output, oxygen uptake, and aerobic and anaerobic contribution to power were determined.
Results: 4MMP average power output significantly decreased by 7% +/- 6%, 6% +/- 8%, and 4% +/- 6% at 24 h, 7 d, and 21 d after blood removal, respectively. Compared with baseline, aerobic contribution during the 4MMP was significantly reduced by 5% +/- 4%, 4% +/- 5%, and 4% +/- 10% at 24 h, 7 d, and 21 d, respectively. The rate of decline in power output on commencement of the 4MMP was significantly attenuated and was 76% coproduct 20%, 72% +/- 24%, and 75% +/- 35% lower than baseline at 24 h, 21 d, and 42 d, respectively.
Conclusion: Removal of 470 mL of blood reduces aerobic energy contribution, alters pacing patterns, and decreases performance during self-paced cycling. These findings indicate the importance of aerobic energy distribution during self-paced middle-distance events.
Details
- Title
- The influence of blood removal on pacing during a 4-minute cycling time trial
- Authors/Creators
- N.G. Lawler (Author/Creator)C.R. Abbiss (Author/Creator)A. Raman (Author/Creator)T.J. Fairchild (Author/Creator)G.L. Maker (Author/Creator)R.D. Trengove (Author/Creator)J.J. Peiffer (Author/Creator)
- Publication Details
- International Journal of Sports Physiology and Performance, Vol.12(8), pp.1085-1092
- Publisher
- Human Kinetics Publishers Inc.
- Identifiers
- 991005540905607891
- Copyright
- © 2017 Human Kinetics, Inc.
- Murdoch Affiliation
- School of Psychology and Exercise Science
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.172 Sports Science
- 1.172.648 Exercise Physiology
- Web Of Science research areas
- Physiology
- Sport Sciences
- ESI research areas
- Clinical Medicine