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Title: Effect of cold-water immersion on skeletal muscle contractile properties in soccer players
Authors: García Manso, Juan Manuel 
Rodríguez-Matoso, Darío
Rodriguez-Ruiz, David 
Sarmiento Montesdeoca, Samuel 
De Saa, Yves
Calderón, Javier
UNESCO Clasification: 241106 Fisiología del ejercicio
Keywords: Initial Responses
Strength, et al
Issue Date: 2011
Publisher: 0894-9115
Journal: American Journal of Physical Medicine and Rehabilitation 
Abstract: Objective: This study was designed to analyze changes in muscle response after cold-water immersion. Design: The vastus lateralis of the dominant leg was analyzed in 12 professional soccer players from the Spanish 2nd Division B using tensiomyography, before and after four cold-water immersions at 4°C lasting 4 mins each. Core temperature, skin temperature, and heart rate were monitored. Results: A significant interaction (P ≤ 0.05) was found in muscle deformation between control conditions (5.12 ± 2.27 mm) and (1) immersion 3 (3.64 ± 2.27 mm) and (2) immersion 4 (3.38 ± 1.34 mm). A steady decrease was also observed in response velocity (immersion 1, −7.3%; immersion 2, −25.9%; immersion 3, −30.0%; immersion 4, −36.6%) and contraction velocity (immersion 1, −11.5%; immersion 2, −22.1%; immersion 3, −35.0%; immersion 4, −41.9%), with statistically significant differences (P ≤ 0.05) in relation to the reference values commencing with the third immersion. No significant differences were found between control conditions in subsequent exposures to cold water for the values of response time and contraction time. Sustained time and reaction time showed an increase during repeated exposures and with longer exposure time, although the increase was not statistically significant. Conclusions: This study shows that repeated cold-water immersions (4 × 4 mins at 4°C) cause considerable alterations to muscle behavior. These alterations significantly affect the state of muscles and their response capacity, particularly in relation to muscle stiffness and muscle contraction velocity.
ISSN: 0894-9115
DOI: 10.1097/PHM.0b013e31820ff352
Source: American Journal Of Physical Medicine & Rehabilitation[ISSN 0894-9115],v. 90 (5), p. 356-363
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