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Effect of leg extension training on concentric and eccentric strength of quadriceps femoris muscles
Author(s) -
Kawakami Y.,
Hirano Y.,
Miyashlta M.,
Fukunaga T.
Publication year - 1993
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/j.1600-0838.1993.tb00356.x
Subject(s) - concentric , isometric exercise , eccentric , medicine , physical medicine and rehabilitation , strength training , physical therapy , quadriceps muscle , muscle strength , anatomy , mathematics , physics , geometry , quantum mechanics
Ten healthy male subjects carried out bilateral concentric leg extension training twice a week for 8 weeks. Before and after the training, maximal voluntary isometric and isokinetic strength and cross‐sectional areas of the quadriceps femoris were measured. Maximal bilateral leg extension power increased significantly after the training. Isometric and concentric unilateral strength did not change significantly before and after the training, while eccentric strength at 0.52 and 1.05 rad·s −1 increased after the training with no changes in cross‐sectional area. The correlations between strength and cross‐sectional area increased significantly after the training. It was speculated that the increase in eccentric strength of knee extensors was due to modification of the neural inhibition during eccentric muscle actions.