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<publisher>HAL CCSD</publisher>
<title lang=en>Ventilatory responses during experimental cycle-run transition in triathletes</title>
<creator>Hue, Olivier</creator>
<creator>Le Gallais, Daniel</creator>
<creator>Boussana, Alain</creator>
<creator>Chollet, Didier</creator>
<creator>Prefaut, Christian</creator>
<contributor>Adaptations au Climat Tropical, Exercice et Santé (ACTES) ; Université des Antilles et de la Guyane (UAG)</contributor>
<contributor>Centre d'Optimisation de la Performance Motrice ; Université Montpellier 1 (UM1)</contributor>
<contributor>Laboratoire de Physiologie des Interactions ; CHU Arnaud de Villeneuve</contributor>
<contributor>Centre d'Optimisation de la Performance Motrice ; Université Montpellier 1 (UM1)</contributor>
<contributor>Centre d’études des transformations des activités physiques et sportives (CETAPS) ; Université de Rouen Normandie (URN) ; Normandie Université (NU) - Normandie Université (NU)</contributor>
<description>International audience</description>
<source>ISSN: 0195-9131</source>
<source>EISSN: 1530-0315</source>
<source>Medicine and Science in Sports and Exercise</source>
<publisher>American College of Sports Medicine (ACSM)</publisher>
<identifier>hal-00720412</identifier>
<identifier>https://hal.univ-antilles.fr/hal-00720412</identifier>
<identifier>https://hal.univ-antilles.fr/hal-00720412/document</identifier>
<identifier>https://hal.univ-antilles.fr/hal-00720412/file/Article.pdf</identifier>
<source>https://hal.univ-antilles.fr/hal-00720412</source>
<source>Medicine and Science in Sports and Exercise, American College of Sports Medicine (ACSM), 1999, pp.1422-1428</source>
<language>en</language>
<subject lang=en>Triathlon</subject>
<subject lang=en>cycle-run transition</subject>
<subject lang=en>exercise-induced hypoxemia</subject>
<subject lang=en>respiratory muscle fatigue</subject>
<subject lang=en>multi-trial training</subject>
<subject>[SDV.OT] Life Sciences [q-bio]/Other [q-bio.OT]</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>PURPOSE AND METHODS: To determine the effects of cycling on a subsequent triathlon run, nine male triathletes underwent four successive laboratory trials: 1) an incremental treadmill test, 2) an incremental cycle test, 3) 30 min of cycling followed by 5 km of running (C-R), and 4) 30 min of running followed by 5 km of running (R-R). Before and 10 min after the third and fourth trials, the triathletes underwent pulmonary function testing including spirometry and diffusing capacity testing for carbon monoxide (DL(CO)). During the C-R and R-R trials, arterialized blood samples were obtained to measure arterial oxygen pressure (PaO2). During all trials, ventilatory data were collected every minute using an automated breath-by-breath system. RESULTS: The results showed that 1) the oxygen uptake (VO2) observed during subsequent running was similar for the C-R and R-R trials; 2) the ventilatory response (VE) during the first 8 min of subsequent running was significantly greater in the C-R than in R-R trial (P < 0.05); 3) only the C-R trial induced a significant increase (P < 0.05) in residual volume (RV), functional residual capacity (FRC), and the ratio of residual volume to total lung capacity (RV/TLC); and 4) although a significant decrease (P < 0.05) in DL(CO) was noted after C-R, no difference between the two exercise trials was found for the maximal drop in PaO2. CONCLUSIONS: We concluded that 1) the C-R trial induced specific alterations in pulmonary function that may be associated with respiratory muscle fatigue and/or exercise-induced hypoxemia, and 2) the greater VE observed during the first minute of running after cycling was due to the specificity of cycling. This reinforces the necessity for triathletes to practice multi-trial training to stimulate the physiological responses experienced during the swim-cycle and the cycle-run transitions.</description>
<date>1999-10</date>
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