Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice

Recently, low-level laser (light) therapy has been used to increase muscle performance in intense exercises. However, there is a lack of understanding of the time response of muscles to light therapy. The first purpose of this study was to determine the time response for light-emitting diode therapy...

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Main Authors: Ferraresi, Cleber, Huang, Ying-Ying, de Sousa, Marcelo Victor Pires, Bagnato, Vanderlei Salvador, Parizotto, Nivaldo Antonio, Hamblin, Michael R.
Other Authors: Massachusetts Institute of Technology. Institute for Medical Engineering & Science
Format: Article
Language:English
Published: Springer London 2017
Online Access:http://hdl.handle.net/1721.1/106485
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author Ferraresi, Cleber
Huang, Ying-Ying
de Sousa, Marcelo Victor Pires
Bagnato, Vanderlei Salvador
Parizotto, Nivaldo Antonio
Hamblin, Michael R.
author2 Massachusetts Institute of Technology. Institute for Medical Engineering & Science
author_facet Massachusetts Institute of Technology. Institute for Medical Engineering & Science
Ferraresi, Cleber
Huang, Ying-Ying
de Sousa, Marcelo Victor Pires
Bagnato, Vanderlei Salvador
Parizotto, Nivaldo Antonio
Hamblin, Michael R.
author_sort Ferraresi, Cleber
collection MIT
description Recently, low-level laser (light) therapy has been used to increase muscle performance in intense exercises. However, there is a lack of understanding of the time response of muscles to light therapy. The first purpose of this study was to determine the time response for light-emitting diode therapy (LEDT)-mediated increase in adenosine triphosphate (ATP) in the soleus and gastrocnemius muscles in mice. Second purpose was to test whether LEDT can increase the resistance of muscles to fatigue during intense exercise. Fifty male Balb/c mice were randomly allocated into two equal groups: LEDT-ATP and LEDT-fatigue. Both groups were subdivided into five equal subgroups: LEDT-sham, LEDT-5 min, LEDT-3 h, LEDT-6 h, and LEDT-24 h. Each subgroup was analyzed for muscle ATP content or fatigue at specified time after LEDT. The fatigue test was performed by mice repeatedly climbing an inclined ladder bearing a load of 150 % of body weight until exhaustion. LEDT used a cluster of LEDs with 20 red (630 ± 10 nm, 25 mW) and 20 infrared (850 ± 20 nm, 50 mW) delivering 80 mW/cm[superscript 2] for 90 s (7.2 J/cm[superscript 2]) applied to legs, gluteus, and lower back muscles. LEDT-6 h was the subgroup with the highest ATP content in soleus and gastrocnemius compared to all subgroups (P < 0.001). In addition, mice in LEDT-6 h group performed more repetitions in the fatigue test (P < 0.001) compared to all subgroups: LEDT-sham and LEDT-5 min (~600 %), LEDT-3 h (~200 %), and LEDT-24 h (~300 %). A high correlation between the fatigue test repetitions and the ATP content in soleus (r = 0.84) and gastrocnemius (r = 0.94) muscles was observed. LEDT increased ATP content in muscles and fatigue resistance in mice with a peak at 6 h. Although the time response in mice and humans is not the same, athletes might consider applying LEDT at 6 h before competition.
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spelling mit-1721.1/1064852022-09-29T16:11:54Z Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice Ferraresi, Cleber Huang, Ying-Ying de Sousa, Marcelo Victor Pires Bagnato, Vanderlei Salvador Parizotto, Nivaldo Antonio Hamblin, Michael R. Massachusetts Institute of Technology. Institute for Medical Engineering & Science Harvard University--MIT Division of Health Sciences and Technology Hamblin, Michael R Recently, low-level laser (light) therapy has been used to increase muscle performance in intense exercises. However, there is a lack of understanding of the time response of muscles to light therapy. The first purpose of this study was to determine the time response for light-emitting diode therapy (LEDT)-mediated increase in adenosine triphosphate (ATP) in the soleus and gastrocnemius muscles in mice. Second purpose was to test whether LEDT can increase the resistance of muscles to fatigue during intense exercise. Fifty male Balb/c mice were randomly allocated into two equal groups: LEDT-ATP and LEDT-fatigue. Both groups were subdivided into five equal subgroups: LEDT-sham, LEDT-5 min, LEDT-3 h, LEDT-6 h, and LEDT-24 h. Each subgroup was analyzed for muscle ATP content or fatigue at specified time after LEDT. The fatigue test was performed by mice repeatedly climbing an inclined ladder bearing a load of 150 % of body weight until exhaustion. LEDT used a cluster of LEDs with 20 red (630 ± 10 nm, 25 mW) and 20 infrared (850 ± 20 nm, 50 mW) delivering 80 mW/cm[superscript 2] for 90 s (7.2 J/cm[superscript 2]) applied to legs, gluteus, and lower back muscles. LEDT-6 h was the subgroup with the highest ATP content in soleus and gastrocnemius compared to all subgroups (P < 0.001). In addition, mice in LEDT-6 h group performed more repetitions in the fatigue test (P < 0.001) compared to all subgroups: LEDT-sham and LEDT-5 min (~600 %), LEDT-3 h (~200 %), and LEDT-24 h (~300 %). A high correlation between the fatigue test repetitions and the ATP content in soleus (r = 0.84) and gastrocnemius (r = 0.94) muscles was observed. LEDT increased ATP content in muscles and fatigue resistance in mice with a peak at 6 h. Although the time response in mice and humans is not the same, athletes might consider applying LEDT at 6 h before competition. National Institutes of Health (U.S.) (grant R01AI050875) 2017-01-13T20:49:35Z 2017-01-13T20:49:35Z 2015-02 2014-11 2016-08-18T15:21:10Z Article http://purl.org/eprint/type/JournalArticle 0268-8921 1435-604X http://hdl.handle.net/1721.1/106485 Ferraresi, Cleber et al. “Time Response of Increases in ATP and Muscle Resistance to Fatigue after Low-Level Laser (Light) Therapy (LLLT) in Mice.” Lasers in Medical Science 30.4 (2015): 1259–1267. en http://dx.doi.org/10.1007/s10103-015-1723-8 Lasers in Medical Science Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. Springer-Verlag London application/pdf Springer London Springer London
spellingShingle Ferraresi, Cleber
Huang, Ying-Ying
de Sousa, Marcelo Victor Pires
Bagnato, Vanderlei Salvador
Parizotto, Nivaldo Antonio
Hamblin, Michael R.
Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice
title Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice
title_full Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice
title_fullStr Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice
title_full_unstemmed Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice
title_short Time response of increases in ATP and muscle resistance to fatigue after low-level laser (light) therapy (LLLT) in mice
title_sort time response of increases in atp and muscle resistance to fatigue after low level laser light therapy lllt in mice
url http://hdl.handle.net/1721.1/106485
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