caa a22 4500 467941610 CHVBK 20180406153014.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s00421-006-0132-x doi (NATIONALLICENCE)springer-10.1007/s00421-006-0132-x Interactions between cadence and power output effects on mechanical efficiency during sub maximal cycling exercises [Elektronische Daten] [Samozino Pierre, Horvais Nicolas, Hintzy Frédérique] The purpose of this study was to investigate the interactions between cadence and power output effects on cycling efficiency. Fourteen healthy subjects performed four constant power output-tests (40, 80, 120 and 160W) in which the cadence varied in five bouts from 40 to 120rpm. Gross efficiency (GE) was determined over the last ten respiratory cycles of each bout and was calculated as the ratio of mechanical energy to energy expenditure. Results showed that (1) GE-cadence relationships reached a maximum at each power output corresponding to the cadence maximising efficiency (CAeff) and (2) GE increased with power output whatever the cadence until a maximal theoretical value. Moreover, interactions were found between these two factors: the cadence effect decreased linearly with power output and the power output effect increased exponentially with cadence. Consequently, cycling efficiency decreased more when cadence differed from CAeff at low than at high power output, and increased more with power output at high cadence than at low cadence. These interactions between cadence and power output effects on GE were mainly due to cadence and power output effects on the energy expenditure shares not contributing to power production. Springer-Verlag, 2006 Cycle ergometer nationallicence Oxygen consumption nationallicence Gross efficiency nationallicence Crossed effects nationallicence Pedalling rate nationallicence Pierre Samozino Laboratoire de Modélisation des Activités Sportives, Université de Savoie—CISM, 73-376, Bourget du lac, France aut Nicolas Horvais Laboratoire de Modélisation des Activités Sportives, Université de Savoie—CISM, 73-376, Bourget du lac, France aut Frédérique Hintzy Laboratoire de Modélisation des Activités Sportives, Université de Savoie—CISM, 73-376, Bourget du lac, France aut European Journal of Applied Physiology Springer-Verlag 97/1(2006-05-01), 133-139 1439-6319 97:1<133 2006 97 421 https://doi.org/10.1007/s00421-006-0132-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0132-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pierre Samozino Laboratoire de Modélisation des Activités Sportives, Université de Savoie—CISM, 73-376, Bourget du lac, France aut NATIONALLICENCE 700 1- Nicolas Horvais Laboratoire de Modélisation des Activités Sportives, Université de Savoie—CISM, 73-376, Bourget du lac, France aut NATIONALLICENCE 700 1- Frédérique Hintzy Laboratoire de Modélisation des Activités Sportives, Université de Savoie—CISM, 73-376, Bourget du lac, France aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/1(2006-05-01), 133-139 1439-6319 97:1<133 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer