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<identifier>oai:HAL:hal-00706159v1</identifier>
<datestamp>2017-12-21</datestamp>
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<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>Does the diurnal increase in central temperature interact with pre-cooling or passive warm-up of the leg?</title>
<creator>Racinais, Sébastien</creator>
<creator>Blonc, Stephen</creator>
<creator>Oksa, Juha</creator>
<creator>Hue, Olivier</creator>
<contributor>Adaptations au Climat Tropical, Exercice et Santé (ACTES) ; Université des Antilles et de la Guyane (UAG)</contributor>
<contributor>Exercise and Sports Science Department ; Qatar Orthopaedic and Sports Medicine Hospital</contributor>
<contributor>Physical Work Capacity Team ; Finnish Institute of Occupational Health</contributor>
<description>International audience</description>
<source>ISSN: 1440-2440</source>
<source>Journal of Science and Medicine in Sport</source>
<publisher>Elsevier</publisher>
<identifier>hal-00706159</identifier>
<identifier>https://hal.univ-antilles.fr/hal-00706159</identifier>
<source>https://hal.univ-antilles.fr/hal-00706159</source>
<source>Journal of Science and Medicine in Sport, Elsevier, 2009, 12 (1), pp.97-100. 〈10.1016/j.jsams.2007.09.008〉</source>
<identifier>DOI : 10.1016/j.jsams.2007.09.008</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsams.2007.09.008</relation>
<language>en</language>
<subject lang=en>Circadian rhythms</subject>
<subject lang=en>Time-of-day</subject>
<subject lang=en>Cycling sprint</subject>
<subject lang=en>Exercise</subject>
<subject lang=en>Muscle power</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>Seven male subjects volunteered to participate in an investigation of whether the diurnalincrease in core temperature influences the effects of pre-cooling or passivewarm-up on muscular power. Morning (07:00-09:00 h) and afternoon (17:00-19:00 h) evaluation of maximal power output during a cycling sprint was performed on different days in a control condition (room at 21.8 °C, 69% rh), after 30 min of pre-cooling in a cold bath (16 °C), or after 30 min of passivewarm-up in a hot bath (38 °C). Despite an equivalent increase from morning to afternoon in core temperature in all conditions (+0.4 °C, P < 0.05), power output displayed a diurnalincrease in control condition only. A local cooling or heating of the leg in a neutral environment blunted the diurnal variation in muscular power. Because pre-cooling decreases muscle power, force and velocity irrespective of time-of-day, athletes should strictly avoid any cooling before a sprint exercise. In summary, diurnal variation in muscle power output seems to be more influenced by muscle rather than core temperature.</description>
<date>2009-01</date>
</dc>
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