Physiological Demands of Cyclists during an Ultra-Endurance Relay Race: A Field Study Report

Bescós Raul ； Rodríguez Ferran-Agustín ； Iglesias Xavier ； Knechtle Beat ； Benítez Adolfo ； Marina Míchel ； Padullés Josep-Maria ； Vázquez Jairo ； Torrado Priscila

《The Chinese Journal of Physiology》 54卷5期 (2011/10) Pp. 37-44

https://doi.org/10.4077/CJP.2011.AMM065

並列摘要

This study was to describe and compare the physiological demands of ultra-endurance cyclists during a 24 h cycling relay race. Eleven male athletes (means ± SD: 34.8 ± 5.6 years; 71.6 ± 4.9 kg; 174.6 ± 7.3 cm; BMI 23.5 ± 0.5 kg/m^2; VO2max: 66.0 ± 6.4 ml/kg/min) participated in the study; eight in teams with a format of four riders (4C) and three in teams with six riders (6C). To investigate exercise intensity, heart rate (HR) was recorded while cycling using portable telemetric monitors. Three different exercise intensities were defined according to the reference HR values obtained during a pre race laboratory incremental VO(subscript 2max) test: Zone I (＜ anaerobic threshold [AT]), Zone II (between AT and the respiratory compensation point [RCP]), Zone III (＞ RCP). Total volume and intensity were integrated as a single variable (training impulse: TRIMP). The score for TRIMP in each zone was computed by multiplying the accumulated duration in this zone by a multiplier for this particular zone of exercise intensity. The average intensity did not differ between cyclists in 4C (means ± SD; 4C:87 ± 3 HR(subscript max)) and 6C (87 ± 1% of HR(subscript max)), despite the higher volume performed by 4C (means ± SD; 4C:361 ± 65; 6C:242 ± 25 per min; P = 0.012). These differences in total exercise volume significantly affected the values TRIMP accumulated (means ± SD; 4C:801 ± 98, confidence interval [CI] 95%: 719-884; 6C:513 ± 25, CI 95%: 451-575; P = 0.012). The ultra-endurance threshold of 4C and 6C athletes lies at about 87% of HR(subscript max) for both. Although the intensity profile was similar, the TRIMP values differed significantly as a consequence of the higher volume performed by the 4C cyclists.

並列關鍵字

ultra-endurance ； cycling ； volume ； intensity ； heart rate ； performance

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