Effects of Light-Emitting Diode Therapy on Muscle Hypertrophy, Gene Expression, Performance, Damage, and Delayed-Onset Muscle Soreness: Case-control Study with a Pair of Identical Twins

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Ferraresi, Cleber ; Bertucci, Danilo ; Schiavinato, Josiane ; Reiff, Rodrigo ; Araujo, Amelia ; Panepucci, Rodrigo ; Matheucci, Jr., Euclides ; Cunha, Anderson Ferreira ; Arakelian, Vivian Maria ; Hamblin, Michael R. ; Parizotto, Nivaldo ; Bagnato, Vanderlei

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF PHYSICAL MEDICINE & REHABILITATION; v. 95, n. 10, p. 746-757, OCT 2016.
• Citações Web of Science: 7

Resumo

Objective The aim of this study was to verify how a pair of monozygotic twins would respond to light-emitting diode therapy (LEDT) or placebo combined with a strength-training program during 12 weeks. Design This case-control study enrolled a pair of male monozygotic twins, allocated randomly to LEDT or placebo therapies. Light-emitting diode therapy or placebo was applied from a flexible light-emitting diode array ( = 850 nm, total energy = 75 J, t = 15 seconds) to both quadriceps femoris muscles of each twin immediately after each strength training session (3 times/wk for 12 weeks) consisting of leg press and leg extension exercises with load of 80% and 50% of the 1-repetition maximum test, respectively. Muscle biopsies, magnetic resonance imaging, maximal load, and fatigue resistance tests were conducted before and after the training program to assess gene expression, muscle hypertrophy and performance, respectively. Creatine kinase levels in blood and visual analog scale assessed muscle damage and delayed-onset muscle soreness, respectively, during the training program. Results Compared with placebo, LEDT increased the maximal load in exercise and reduced fatigue, creatine kinase, and visual analog scale. Gene expression analyses showed decreases in markers of inflammation (interleukin 1) and muscle atrophy (myostatin) with LEDT. Protein synthesis (mammalian target of rapamycin) and oxidative stress defense (SOD2 {[}mitochondrial superoxide dismutase]) were up-regulated with LEDT, together with increases in thigh muscle hypertrophy. Conclusions Light-emitting diode therapy can be useful to reduce muscle damage, pain, and atrophy, as well as to increase muscle mass, recovery, and athletic performance in rehabilitation programs and sports medicine. (AU)

• Processo FAPESP: 12/05919-0 - Efeitos do laser de baixa intensidade sobre a modulação do transcriptoma, imuno-histoquímica do tecido muscular e o desempenho físico de homens jovens submetidos a treinamento físico de força
• Beneficiário: Cleber Ferraresi
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 10/07194-7 - Uso das terapias laser e LED (Light-Emitting Diode) de baixa intensidade para aumentar o desempenho muscular: do in vitro e experimental ao uso clínico
• Beneficiário: Cleber Ferraresi
• Modalidade de apoio: Bolsas no Brasil - Doutorado