caa a22 4500 467942323 CHVBK 20180406153016.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s00421-006-0159-z doi (NATIONALLICENCE)springer-10.1007/s00421-006-0159-z Neural and muscular changes to detraining after electrostimulation training [Elektronische Daten] [Julien Gondin, Marie Guette, Yves Ballay, Alain Martin] We investigated the effects of 4weeks of detraining subsequent to an 8-week electrostimulation (ES) training program on changes in muscle strength, neural and muscular properties of the knee extensor muscles. Nine male subjects followed the training program consisting of 32 sessions of isometric ES training over an 8-week period. All subjects were tested before and after 8weeks of ES training, and were then retested after 4weeks of detraining. Quadriceps muscle anatomical cross-sectional area (ACSA) was assessed by ultrasonography imaging. The electromyographic (EMG) activity and muscle activation (i.e., by means of the twitch interpolation technique) obtained during maximal voluntary contractions (MVC) were used to examine neural adaptations. After training, the knee extensor voluntary torque increased significantly by 26%. Torque gains were accompanied by an increase in vastii EMG activity normalized to respective M-wave (+43%), muscle activation (+6%) and quadriceps ACSA (+6%). After detraining, knee extensor MVC, vastii EMG activity, muscle activation and quadriceps ACSA decreased significantly by 9%, 20%, 5% and 3%, respectively. Also, the knee extensor MVC values remained significantly elevated (14%) above baseline levels at the end of the detraining period and this was associated with a larger quadriceps ACSA (+3%) but not with a higher neural activation. We concluded that the voluntary torque losses observed after detraining could be attributed to both neural and muscular alterations. Muscle size preservation could explain the higher knee extensor MVC values observed after the cessation of training compared to those obtained before training, therefore indicating that muscle size changes are slower than neural drive reduction. Springer-Verlag, 2006 Cessation of training nationallicence Strength nationallicence Muscle activation nationallicence EMG activity nationallicence Muscle cross-sectional area nationallicence Gondin Julien Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut Guette Marie Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut Ballay Yves Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut Martin Alain Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut European Journal of Applied Physiology Springer-Verlag 97/2(2006-05-01), 165-173 1439-6319 97:2<165 2006 97 421 https://doi.org/10.1007/s00421-006-0159-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0159-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gondin Julien Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut NATIONALLICENCE 700 1- Guette Marie Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut NATIONALLICENCE 700 1- Ballay Yves Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut NATIONALLICENCE 700 1- Martin Alain Faculté des Sciences du Sport, INSERM/ERM 207 Motricité-Plasticité, UFR STAPS, BP 27877, 21078, Dijon Cedex, France aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/2(2006-05-01), 165-173 1439-6319 97:2<165 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer