Document Detail

Exercise-induced changes in triceps surae tendon stiffness and muscle strength affect running economy in humans.
MedLine Citation:
PMID:  23328797     Owner:  NLM     Status:  Publisher    
The purpose of the present study was to investigate whether increased tendon-aponeurosis stiffness and contractile strength of the triceps surae (TS) muscle-tendon units induced by resistance training would affect running economy. Therefore, an exercise group (EG, n = 13) performed a 14-week exercise program, while the control group (CG, n = 13) did not change their training. Maximum isometric voluntary contractile strength and TS tendon-aponeurosis stiffness, running kinematics and fascicle length of the gastrocnemius medialis (GM) muscle during running were analyzed. Furthermore, running economy was determined by measuring the rate of oxygen consumption at two running velocities (3.0, 3.5 ms(-1)). The intervention resulted in a ∼7 % increase in maximum plantarflexion muscle strength and a ∼16 % increase in TS tendon-aponeurosis stiffness. The EG showed a significant ∼4 % reduction in the rate of oxygen consumption and energy cost, indicating a significant increase in running economy, while the CG showed no changes. Neither kinematics nor fascicle length and elongation of the series-elastic element (SEE) during running were affected by the intervention. The unaffected SEE elongation of the GM during the stance phase of running, in spite of a higher tendon-aponeurosis stiffness, is indicative of greater energy storage and return and a redistribution of muscular output within the lower extremities while running after the intervention, which might explain the improved running economy.
Kirsten Albracht; Adamantios Arampatzis
Related Documents :
17034467 - Leg crossers' dimple: a form of localized lipoatrophy.
24095267 - Referent body weight values in over ground walking, over ground jogging, treadmill jogg...
1135617 - One-legged pedalling compared with two-legged pedalling on a bicycle ergometer as a bas...
9194997 - Impedance ratio as a measure of water shifts.
8570997 - Applied physiology of rugby league.
8901957 - Inhaled nitric oxide.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-18
Journal Detail:
Title:  European journal of applied physiology     Volume:  -     ISSN:  1439-6327     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Institute of Biomechanics and Orthopaedics, German Sport University, Cologne, Germany,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Data Envelopment Analysis in the Presence of Measurement Error: Case Study from the National Databas...
Next Document:  Patterns of adherence behaviour for patients with glaucoma.