Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/15059
Title: | Effects of isometric quadriceps strength training at different muscle lengths on dynamic torque production |
Authors: | Noorkõiv, M Nosaka, K Blazevich, AJ |
Keywords: | dynamic torque;length-specificity;angular velocity |
Issue Date: | 2015 |
Citation: | Journal of Sports Sciences, 2015, 33 (18), pp. 1952 - 1961 |
Abstract: | This study aims to (1) determine whether isometric training at a short vs. long quadriceps muscle length affects concentric torque production; (2) examine the relationship between muscle hypertrophy and concentric torque; and (3) determine whether changes in fascicle length are associated with changes in concentric torque. Sixteen men performed isometric training at a short (SL, n = 8) or a long muscle length (LL, n = 8). Changes in maximal concentric torque were measured at 30, 60, 90, 120, 180, 240 and 300 rad · s−1. The relationships between the changes in concentric torque, cross-sectional area, volume and fascicle length were tested. Concentric torque increased significantly after training only in LL and at angular velocities of 30 and 120 rad · s−1 by 12–13% (P < 0.05). Muscle size increased in LL only, the changes were correlated (r = 0.73–0.93, P < 0.05) with the changes in concentric torque. Vastus lateralis (VL) fascicle length increased in both groups (5.4 ± 4.9%, P = 0.001) but the change was not correlated with changes in concentric torque in either group. Isometric training-induced increases in muscle size and concentric torque were best elicited by training at long muscle lengths. These results highlight a clear muscle length dependence of isometric training on dynamic torque production. |
URI: | http://bura.brunel.ac.uk/handle/2438/15059 |
DOI: | http://dx.doi.org/10.1080/02640414.2015.1020843 |
ISSN: | 0264-0414 1466-447X |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fulltext.pdf | 590.08 kB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.