Document Detail

Effects of static and dynamic training on the stiffness and blood volume of tendon in vivo.
MedLine Citation:
PMID:  19112156     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to investigate the effects of static and dynamic training on the stiffness and blood volume of the human tendon in vivo. Ten subjects completed 12 wk (4 days/wk) of a unilateral training program for knee extensors. They performed static training on one side [ST; 70% of maximum voluntary contraction (MVC)] and dynamic training on the other side (DT; 80% of one repetition maximum). Before and after training, MVC, neural activation level (by interpolated twitch), muscle volume (by magnetic resonance imaging), stiffness of tendon-aponeurosis complex and patella tendon (by ultrasonography), and blood volume of patella tendon (by red laser lights) were measured. Both protocols significantly increased MVC (49% for ST, 32% for DT; both P < 0.001), neural activation level (9.5% for ST, 7.6% for DT; both P < 0.01), and muscle volume (4.5% for ST, 5.6% for DT; both P < 0.01). The stiffness of tendon-aponeurosis complex increased significantly after ST (55%; P = 0.003) and DT (30%; P = 0.033), while the stiffness of patella tendon increased significantly after ST (83%; P < 0.001), but not for DT (P = 0.110). The blood volume of patella tendon increased significantly after DT (47%; P = 0.016), but not for ST (P = 0.205). These results implied that the changes in the blood volume of tendon would be related to differences in the effects of resistance training on the tendon properties.
Keitaro Kubo; Toshihiro Ikebukuro; Katsutoshi Yaeshima; Hideaki Yata; Naoya Tsunoda; Hiroaki Kanehisa
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-12-26
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  106     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-02-06     Completed Date:  2009-03-12     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  412-7     Citation Subset:  IM    
Deptartment of Life Science, Sports Sciences Univ. of Tokyo, Komaba 3-8-1, Meguro-ku, Tokyo 153-8902, Japan.
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MeSH Terms
Blood Volume*
Electric Stimulation
Knee Joint / physiology*
Magnetic Resonance Imaging
Muscle Contraction*
Muscle Strength
Organ Size
Patellar Ligament / innervation,  physiology*,  ultrasonography
Quadriceps Muscle / innervation,  physiology*,  ultrasonography
Resistance Training*
Young Adult

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