Effects of low-level laser therapy (808 nm) on isokinetic muscle performance of young women submitted to endurance training: a randomized controlled clinical trial

Vieira, Wouber Hérickson de Brito; Ferraresi, Cleber; Perez, Sérgio Eduardo de Andrade; Baldissera, Vilmar; Parizotto, Nivaldo Antônio

doi:10.1007/s10103-011-0984-0

Cited by 85 publications

(66 citation statements)

References 32 publications

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“…Corroborating this statement, our results for muscular ATP content and fatigue-muscle resistance were highly correlated, reinforcing the importance of a good energy supply to achieve the best performance in exercise [18]. In the context of energy metabolism, previous studies already reported possible effects of light therapy on resynthesis of creatinephosphate (Cr-P) using ATP produced in mitochondria, as well as the consumption of lactate produced by anaerobic metabolism during fatigue or strength exercise [15,30,31]. Therefore, we believe that these mechanisms could provide better energy restore/supply during the fatiguing exercise.…”

Section: Discussionsupporting

confidence: 78%

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

et al. 2015

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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 2 for 90 s (7.2 J/cm 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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Section: Discussionsupporting

confidence: 78%

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

et al. 2015

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“…Thus, it is possible to observe that the combination of moderate intensity exercises, nutritional education and low level laser therapy, was more efficient, as confirmed by previous studies [21][22][23][24][25]37,39]. These reductions may lead to the decrease in the likelihood of comorbidities, such as hypertension [8,40], various cardiovascular problems [3,40] insulin resistance and diabetes mellitus type 2 [3,41].…”

Section: Discussionsupporting

confidence: 53%

Regression of Non-Alcoholic Fatty Liver by Metabolic Reduction: Phototherapy in Association with Aerobic Plus Resistance Training In Obese Man - A Pilot Study

Aquino¹,

Carbinatto²,

Moriyama³

et al. 2017

J Obes Weight Loss Ther

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The excessive body fat, one of the results of obesity, brings with it comorbidities such as lipid changes, insulin resistance, diabetes mellitus type 2 and non-alcoholic fatty liver disease. In this controlled and randomized pilot study, as a non-pharmacological and non-invasive strategy, we consider two groups during 8 weeks: the use of moderate intensity physical exercise and nutritional education, as control group (n=10) and moderate intensity physical exercise, nutritional education and phototherapy (n=10), as phototherapy group. The used phototherapy parameters were: laser Ga-Al-As, wavelength 808 nm, continuous mode, output power 100 mW, and total energy delivery 92.16 J. Selected patients were men with age between 20 and 40 years old, primary obesity, body mass index (BMI) between 30 and 34.9 kg/m 2 . The special device as described in the text was applied, allocated in the anterior region and posterior region of body during 5 minutes each side, totalizing 10 minutes of application of light, always at the end after session of exercise. Comparing the control group in relation to the phototherapy group, the better results were obtained for the phototherapy group, with statistical difference in all anthropometric variables, such as the increase of 3.54% (p<0.007) in total skeletal muscle mass; as well as, 2.77% (p<0.005) in the basal metabolic rate body; 5.47% (p<0.04) for metabolic progress; reduction of 4.67% (p<0.007) for body mass and reduction was also observed for total body fat, total trunk fat and visceral fat of which the phototherapy group showed the following reduction percentages: 14.3% (p<0.01), 14.7% (p<0.005) and 16.4% (p<0.03), respectively. A significant improvement was also observed in all the biochemical parameters and enzymatic analyzed, such as total cholesterol, triglyceride, the basal insulin, glutamic oxaloacetic transaminase, glutamic pyruvic transaminase, and gamma-glutamyl-transpeptidase. Therefore the proposed treatment in this work suggests that the association of physical exercise, the nutritional education and phototherapy applied in obese men for two months caused great improvement in all anthropometric parameters, as well as, in all biochemistry and enzymatic parameters indicating that phototherapy is a potential instrument in the treatment of non-alcoholic fatty liver disease, being able to reverse the degree of steatosis in 8 weeks, besides it can be a new non-invasive treatment to obesity and its comorbidities.

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“…Several studies have used near-infrared LLLT or LEDT to improve muscle performance (Borsa, Larkin, and True, 2013; Ferraresi, Hamblin, and Parizotto, 2012; Leal-Junior et al, 2013). The main effects reported by these studies are: decreased muscle fatigue; lower blood lactate levels and less muscle damage (blood CK levels); increased torque; workload; aerobic capacity; oxidative stress defense; and micro-circulation when applied to muscles (Borsa, Larkin, and True, 2013; Da Silva Alves et al, 2014; De Marchi et al, 2012; Ferraresi et al, 2011; Ferraresi, Hamblin, and Parizotto, 2012; Vieira et al, 2012). …”

Section: Discussionmentioning

confidence: 99%

Muscular pre-conditioning using light-emitting diode therapy (LEDT) for high-intensity exercise: a randomized double-blind placebo-controlled trial with a single elite runner

Ferraresi

Beltrame

Fabrizzi

et al. 2015

Physiotherapy Theory and Practice

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Recently, low-level laser (light) therapy (LLLT) has been used to improve muscle performance. This study aimed to evaluate the effectiveness of near-infrared light-emitting diode therapy (LEDT) and its mechanisms of action to improve muscle performance in an elite athlete. The kinetics of oxygen uptake (VO2), blood and urine markers of muscle damage (creatine kinase – CK and alanine) and fatigue (lactate) were analyzed. Additionally, some metabolic parameters were assessed in urine using proton nuclear magnetic resonance spectroscopy (1H NMR). A LED cluster with 50 LEDs (λ = 850 nm; 50mW 15 s; 37.5 J) was applied on legs, arms and trunk muscles of a single runner athlete 5 min before a high-intense constant workload running exercise on treadmill. The athlete received either Placebo-1-LEDT; Placebo-2-LEDT; or Effective-LEDT in a randomized double-blind placebo-controlled trial with washout period of 7 d between each test. LEDT improved the speed of the muscular VO2 adaptation (~−9 s), decreased O2 deficit (~−10 L), increased the VO2 from the slow component phase (~+348 ml min−1) and increased the time limit of exercise (~+589 s). LEDT decreased blood and urine markers of muscle damage and fatigue (CK, alanine and lactate levels). The results suggest that a muscular pre-conditioning regimen using LEDT before intense exercises could modulate metabolic and renal function to achieve better performance.

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Effects of low-level laser therapy (808 nm) on isokinetic muscle performance of young women submitted to endurance training: a randomized controlled clinical trial

Cited by 85 publications

References 32 publications

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

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

Regression of Non-Alcoholic Fatty Liver by Metabolic Reduction: Phototherapy in Association with Aerobic Plus Resistance Training In Obese Man - A Pilot Study

Muscular pre-conditioning using light-emitting diode therapy (LEDT) for high-intensity exercise: a randomized double-blind placebo-controlled trial with a single elite runner

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