caa a22 4500 467940797 CHVBK 20180406153011.0 cr unu---uuuuu 170328e20060401xx s 000 0 eng 10.1007/s00421-005-0108-2 doi (NATIONALLICENCE)springer-10.1007/s00421-005-0108-2 Influence of the contact time on coupling time and a simple method to measure coupling time [Elektronische Daten] [K. Zameziati, J. B. Morin, E. Deiuri, A. Telonio, A. Belli] The enhancement of performance in stretch shortening cycle (SSC) exercises has been attributed to the recoil of elastic energy stored during the stretching phase and depends on the duration of the coupling time (T coupling) i.e., the duration of the isometric phase occurring between the stretch and the shortening of the muscle. However, instead of T coupling, the contact time (T contact)—i.e., the sum of T coupling plus the duration of the stretching and shortening phases that precede and follow T coupling—is more easily and often measured. The aim of this study was to investigate the T coupling changes within a large range of T contact, in order to propose a possible relationship between T coupling and T contact, thus allowing the accurate measurement of T coupling only from a tachometer and force data obtained classically in vertical jumps, jumps on sledge apparatus and running on force treadmills. Eleven subjects performed SSC exercises on a sledge apparatus with a large range of T contact (400, 700, 1,000, 1,500, 2,000 and 2,500ms). The T coupling and T contact values were measured individually, from force platform recordings and the velocity of the carriage seat obtained by a tachometer. For the longest T contact (i.e., from 850 to 2,500ms), we observed a significant linear relationship between T contact and T coupling. This transition between T contact shorter or longer than about 850ms seems to be important and to correspond to T coupling close to 300ms. This limit observed in the present study could be explained physiologically due to a possible modification of the cross-bridges formation. Springer-Verlag, 2006 Contact time nationallicence Coupling time nationallicence Zameziati K. Departement des Sciences et Technologies des Activités Physiques et Sportives—Unité PPEH, Université de Saint Etienne, Saint-Etienne Cedex 2, France aut Morin J. B. Departement des Sciences et Technologies des Activités Physiques et Sportives—Unité PPEH, Université de Saint Etienne, Saint-Etienne Cedex 2, France aut Deiuri E. Dipartimento di Scienze e Tecnologie Biomediche, Sezione di Fisiologia, Università di Udine, Udine, Italia aut Telonio A. Dipartimento di Scienze e Tecnologie Biomediche, Sezione di Fisiologia, Università di Udine, Udine, Italia aut Belli A. Departement des Sciences et Technologies des Activités Physiques et Sportives—Unité PPEH, Université de Saint Etienne, Saint-Etienne Cedex 2, France aut European Journal of Applied Physiology Springer-Verlag 96/6(2006-04-01), 752-756 1439-6319 96:6<752 2006 96 421 https://doi.org/10.1007/s00421-005-0108-2 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-005-0108-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zameziati K. Departement des Sciences et Technologies des Activités Physiques et Sportives—Unité PPEH, Université de Saint Etienne, Saint-Etienne Cedex 2, France aut NATIONALLICENCE 700 1- Morin J. B. Departement des Sciences et Technologies des Activités Physiques et Sportives—Unité PPEH, Université de Saint Etienne, Saint-Etienne Cedex 2, France aut NATIONALLICENCE 700 1- Deiuri E. Dipartimento di Scienze e Tecnologie Biomediche, Sezione di Fisiologia, Università di Udine, Udine, Italia aut NATIONALLICENCE 700 1- Telonio A. Dipartimento di Scienze e Tecnologie Biomediche, Sezione di Fisiologia, Università di Udine, Udine, Italia aut NATIONALLICENCE 700 1- Belli A. Departement des Sciences et Technologies des Activités Physiques et Sportives—Unité PPEH, Université de Saint Etienne, Saint-Etienne Cedex 2, France aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 96/6(2006-04-01), 752-756 1439-6319 96:6<752 2006 96 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer