FOSTER, CARL and DE KONING, JOS J and HETTINGA, FLOOR and LAMPEN, JOANNE and LA CLAIR, KERRY L and DODGE, CHRISTOPHER and BOBBERT, MAARTEN and PORCARI, JOHN P (2003) Pattern of Energy Expenditure during Simulated Competition. Medicine & Science in Sports & Exercise, 35 (5). pp. 826-831. DOI https://doi.org/10.1249/01.mss.0000065001.17658.68
FOSTER, CARL and DE KONING, JOS J and HETTINGA, FLOOR and LAMPEN, JOANNE and LA CLAIR, KERRY L and DODGE, CHRISTOPHER and BOBBERT, MAARTEN and PORCARI, JOHN P (2003) Pattern of Energy Expenditure during Simulated Competition. Medicine & Science in Sports & Exercise, 35 (5). pp. 826-831. DOI https://doi.org/10.1249/01.mss.0000065001.17658.68
FOSTER, CARL and DE KONING, JOS J and HETTINGA, FLOOR and LAMPEN, JOANNE and LA CLAIR, KERRY L and DODGE, CHRISTOPHER and BOBBERT, MAARTEN and PORCARI, JOHN P (2003) Pattern of Energy Expenditure during Simulated Competition. Medicine & Science in Sports & Exercise, 35 (5). pp. 826-831. DOI https://doi.org/10.1249/01.mss.0000065001.17658.68
Abstract
Purpose: To determine how athletes spontaneously use their energetic reserves when the only instruction was to finish in minimal time, and whether experience from repeated performance changes the strategy of recreational athletes. Methods: Recreational road cyclists/speed skaters (N = 9) completed three laboratory time trials of 1500 m on a windload braked cycle. The pattern of energy use was calculated from total work and from the work attributable to aerobic metabolism, which allowed computation of anaerobic energy use. Regional level speed skaters (N = 8) also performed a single 1500-m time trial with the same protocol and measurements. Results: The serial trials were completed in (mean ± SD) 133.8 ± 6.6, 133.9 ± 5.8, 133.8 ± 5.5 s (P > 0.05 among trials); and in 125.7 ± 10.9 s in the skaters (P < 0.05 vs cyclists). The VO2peak during the terminal 200 m was similar within trials (3.23 ± 0.44, 3.34 ± 0.44, 3.30 ± 0.51 (P > 0.05)) versus 3.91 ± 0.68 L·min-1 in the skaters (P < 0.05 vs cyclists). In all events, the initial power output and anaerobic energy use was high and decayed to a more or less constant value (∼25% of peak) over the remainder of the event. Contrary to predictions based on an assumed "all out" starting strategy, the subjects reserved some of their ability to perform anaerobic work for a terminal acceleration. The total work accomplished was not different between trials (43.53, 43.78, and 47.48 kJ in the recreational athletes, or between the cyclists and skaters (47.79 kJ). The work attributable to anaerobic sources was not different between the rides (20.67, 20.53, and 21.12 kJ in the recreational athletes). In the skaters, the work attributable to anaerobic sources was significantly larger versus the cyclists (24.67 kJ). Conclusion: Energy expenditure during high-intensity cycling seems: 1) to be expended in a manner that allows the athlete to preserve an anaerobic energetic contribution throughout an event, 2) does not appear to have a large learning effect in already well trained cyclists, and 3) anaerobic energy expenditure may be the performance discriminating factor among groups of athletes.
Item Type: | Article |
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Uncontrolled Keywords: | anaerobic exercise; sports performance; cycling; anaerobic capacity |
Subjects: | R Medicine > RC Internal medicine > RC1200 Sports Medicine |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Sport, Rehabilitation and Exercise Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 26 Jan 2016 20:16 |
Last Modified: | 07 Aug 2024 20:26 |
URI: | http://repository.essex.ac.uk/id/eprint/15974 |