caa a22 4500 467940207 CHVBK 20180406153010.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/s00421-006-0297-3 doi (NATIONALLICENCE)springer-10.1007/s00421-006-0297-3 The effects of varying time under tension and volume load on acute neuromuscular responses [Elektronische Daten] [Quan Tran, David Docherty, David Behm] The purpose of this study was to examine the effects of different methods of measuring training volume, controlled in different ways, on selected variables that reflect acute neuromuscular responses. Eighteen resistance-trained males performed three fatiguing protocols of dynamic constant external resistance exercise, involving elbow flexors, that manipulated either time-under-tension (TUT) or volume load (VL), defined as the product of training load and repetitions. Protocol A provided a standard for TUT and VL. Protocol B involved the same VL as Protocol A but only 40% concentric TUT; Protocol C was equated to Protocol A for TUT but only involved 50% VL. Fatigue was assessed by changes in maximum voluntary isometric contraction (MVIC), interpolated doublet (ID), muscle twitch characteristics (peak twitch, time to peak twitch, 0.5 relaxation time, and mean rates of force development and twitch relaxation). All protocols produced significant changes (P≤0.05) in the measures considered to reflect neuromuscular fatigue, with the exception of ID. Fatigue was related to an increase in either TUT or VL with greater fatigue, as reflected by MVIC and peripheral measures, being associated with differences in TUT. The lack of change in ID suggests that fatigue was more related to peripheral than central mechanisms. It was concluded that the load and contraction velocities of the repetitions have different effects on acute neuromuscular responses and should, therefore, be clearly calculated when describing training volume for dynamic constant external resistance exercise training. Springer-Verlag, 2006 Contractile properties nationallicence Contraction velocity nationallicence Central nationallicence Peripheral nationallicence Fatigue nationallicence Tran Quan University of Queensland, Brisbane, QLD, Australia aut Docherty David School of Physical Education, University of Victoria, V8W 3P1, Victoria, BC, Canada aut Behm David Memorial University, St Johns', NF, Canada aut European Journal of Applied Physiology Springer-Verlag 98/4(2006-11-01), 402-410 1439-6319 98:4<402 2006 98 421 https://doi.org/10.1007/s00421-006-0297-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0297-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tran Quan University of Queensland, Brisbane, QLD, Australia aut NATIONALLICENCE 700 1- Docherty David School of Physical Education, University of Victoria, V8W 3P1, Victoria, BC, Canada aut NATIONALLICENCE 700 1- Behm David Memorial University, St Johns', NF, Canada aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 98/4(2006-11-01), 402-410 1439-6319 98:4<402 2006 98 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer