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Tytuł pozycji:

Effects of pre-irradiation of low-level laser therapy with different doses and wavelengths in skeletal muscle performance, fatigue, and skeletal muscle damage induced by tetanic contractions in rats.

Tytuł:
Effects of pre-irradiation of low-level laser therapy with different doses and wavelengths in skeletal muscle performance, fatigue, and skeletal muscle damage induced by tetanic contractions in rats.
Autorzy:
Santos LA; Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil.
Marcos RL
Tomazoni SS
Vanin AA
Antonialli FC
Grandinetti Vdos S
Albuquerque-Pontes GM
de Paiva PR
Lopes-Martins RÁ
de Carvalho Pde T
Bjordal JM
Leal-Junior EC
Źródło:
Lasers in medical science [Lasers Med Sci] 2014 Sep; Vol. 29 (5), pp. 1617-26. Date of Electronic Publication: 2014 Mar 21.
Typ publikacji:
Journal Article; Research Support, Non-U.S. Gov't
Język:
English
Imprint Name(s):
Publication: London : Springer
Original Publication: London : Baillière Tindall, c1986-
MeSH Terms:
Low-Level Light Therapy/*methods
Muscle Contraction/*radiation effects
Muscle Fatigue/*radiation effects
Muscle, Skeletal/*pathology
Muscle, Skeletal/*radiation effects
Tetany/*physiopathology
Tetany/*therapy
Animals ; Biomechanical Phenomena/radiation effects ; Creatine Kinase/metabolism ; Dose-Response Relationship, Radiation ; Electric Stimulation ; Male ; Muscle, Skeletal/physiopathology ; Rats, Wistar
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Substance Nomenclature:
EC 2.7.3.2 (Creatine Kinase)
Entry Date(s):
Date Created: 20140322 Date Completed: 20151110 Latest Revision: 20211021
Update Code:
20240104
DOI:
10.1007/s10103-014-1560-1
PMID:
24651950
Czasopismo naukowe
This study aimed to evaluate the effects of low-level laser therapy (LLLT) immediately before tetanic contractions in skeletal muscle fatigue development and possible tissue damage. Male Wistar rats were divided into two control groups and nine active LLLT groups receiving one of three different laser doses (1, 3, and 10 J) with three different wavelengths (660, 830, and 905 nm) before six tetanic contractions induced by electrical stimulation. Skeletal muscle fatigue development was defined by the percentage (%) of the initial force of each contraction and time until 50 % decay of initial force, while total work was calculated for all six contractions combined. Blood and muscle samples were taken immediately after the sixth contraction. Several LLLT doses showed some positive effects on peak force and time to decay for one or more contractions, but in terms of total work, only 3 J/660 nm and 1 J/905 nm wavelengths prevented significantly (p < 0.05) the development of skeletal muscle fatigue. All doses with wavelengths of 905 nm but only the dose of 1 J with 660 nm wavelength decreased creatine kinase (CK) activity (p < 0.05). Qualitative assessment of morphology revealed lesser tissue damage in most LLLT-treated groups, with doses of 1-3 J/660 nm and 1, 3, and 10 J/905 nm providing the best results. Optimal doses of LLLT significantly delayed the development skeletal muscle performance and protected skeletal muscle tissue against damage. Our findings also demonstrate that optimal doses are partly wavelength specific and, consequently, must be differentiated to obtain optimal effects on development of skeletal muscle fatigue and tissue preservation. Our findings also lead us to think that the combined use of wavelengths at the same time can represent a therapeutic advantage in clinical settings.

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