A influência do laser 830nm no desempenho do salto de atletas de voleibol feminino

Maciel, Thiago dos Santos; Silva, Jefferson da; Jorge, Felipe Sampaio; Nicolau, Renata Amadei

doi:10.4322/rbeb.2013.020

Cited by 17 publications

(8 citation statements)

References 16 publications

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“…However, a later study, conducted with athletes by Maciel et al [49], which applied LLLT (830 nm) in the medial gastrocnemius muscle, showed no significant difference in the increase of the RMS signal (p = 0.1563), the force peak (p = 0.4219), and the onset of muscle fatigue (p = 0.2188). However, Muñoz et al [29] observed that the masseter muscle activity was significantly higher after LLLT (780 nm) (p < 0.05) compared to control values, even without significant differences in the values of strength and fatigue times (p > 0.05).…”

Section: Discussionmentioning

confidence: 86%

Effects of low-level laser therapy (LLLT 808 nm) on lower limb spastic muscle activity in chronic stroke patients

et al. 2016

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A cerebrovascular accident (CVA) may affect basic motor functions, including spasticity that may be present in the upper extremity and/or the lower extremity, post-stroke. Spasticity causes pain, muscle force reduction, and decreases the time to onset of muscle fatigue. Several therapeutic resources have been employed to treat CVA to promote functional recovery. The clinical use of low-level laser therapy (LLLT) for rehabilitation of muscular disorders has provided better muscle responses. Thus, the aim of this study was to evaluate the effect of the application of LLLT in spastic muscles in patients with spasticity post-CVA. A double-blind clinical trial was conducted with 15 volunteer stroke patients who presented with post-stroke spasticity. Both males and females were treated; the average age was 51.5 ± 11.8 years old; the participants entered the study ranging from 11 to 48 months post-stroke onset. The patients participated in three consecutive phases (control, placebo, and real LLLT), in which all tests of isometric endurance of their hemiparetic lower limb were performed. LLLT (diode laser, 100 mW 808 nm, beam spot area 0.0314 cm(2), 127.39 J/cm(2)/point, 40 s) was applied before isometric endurance. After the real LLLT intervention, we observed significant reduction in the visual analogue scale for pain intensity (p = 0.0038), increased time to onset of muscle fatigue (p = 0.0063), and increased torque peak (p = 0.0076), but no significant change in the root mean square (RMS) value (electric signal in the motor unit during contraction, as obtained with surface electromyography). Our results suggest that the application of LLLT may contribute to increased recruitment of muscle fibers and, hence, to increase the onset time of the spastic muscle fatigue, reducing pain intensity in stroke patients with spasticity, as has been observed in healthy subjects and athletes.

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Section: Discussionmentioning

confidence: 86%

Effects of low-level laser therapy (LLLT 808 nm) on lower limb spastic muscle activity in chronic stroke patients

et al. 2016

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“…A fadiga muscular funciona como processo de defesa do organismo na tentativa de impedir que as reservas de energia do corpo se esgotem, pode ser caracterizada pela redução dos níveis de força, durante ou após um exercício físico (MACIEL et al, 2013 As mitocôndrias possuem fotorreceptores que captam energia irradiada pelo laser e um desses receptores é o citrocomo C oxidase (Cco), que é uma enzima responsável pela transferência de elétrons, processo que está diretamente envolvido com a produção de energia. Sendo assim, a TLBI pode aumentar a síntese de ATP pela aceleração das reações enzimáticas que ocorrem no processo de respiração celular, gerando uma adaptação metabólica nessa organela (SOUZA, 2013).…”

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Avaliação dos parâmetros termográficos e a percepção da fadiga muscular em atletas de badminton submetidos à laserterapia

Nolêto¹,

Silva²,

Pessoa³

et al. 2021

Tópicos Em Ciências Da Saúde – Volume 23

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“…The benefits of LLLT in skeletal muscle include enhanced strength for everyday activities and sports, without damage to the fibers or reduced muscle functionality (Baroni et al, 2010;Caetano and Zanuto, 2013;Kelencz et al, 2010;Leal et al, 2009a;2009b;Liu et al, 2009;Lopes-Martins et al, 2006;Maciel et al, 2013). The dose and form of LLLT application were selected to primarily enhance cellular activity (Andrade et al, 2011;Lopes-Martins et al, 2007;Caetano and Zanuto et al, 2013;Santos et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…with radiation different wavelengths (Andrade et al, 2011;Leal et al, 2010c;Lopes-Martins et al, 2007;Maciel et al, 2013;Place et al, 2010;Rocha and Barbanti, 2007).…”

Section: Discussionmentioning

confidence: 99%

Effect of low-level laser therapy (GaAlAs - λ660 nm) on muscle function

Giaretta

Santos²,

Barbosa

et al. 2015

Res. Biomed. Eng.

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Introduction: Low-level laser therapy (LLLT) is effective in preventing fatigue and in stimulating the microcirculation and cellular activity. In this study, we examined the effect of LLLT on injured tibial muscle in vivo by assessing muscle function during fatigue. Methods: Twenty-four male mice were used. Each mouse received an injection of sterile 0.9% saline solution (50 µL) in the right tibialis anterior muscle, after which the tendon of the muscle was exposed, connected to an isometric transducer and subjected to a resting tension of 1 g. A bipolar electrode was attached to the tibial nerve for electrical stimulation. The mice were randomly allocated to one of two groups: G1 (control: 3 h -n=8 and 9 h -n=5) and G2 (treated with GaAlAs laser, λ660 nm, 35 mW, 0.6 J, 17 s: 3 h -n=6 and 9 h -n=5). Results: In G1 mice, the amplitude of the tetanic contracture in response to induced fatigue remained unchanged during six consecutive tetani. The amplitude of the tetanic contractions in response to electrical stimulation (4-8 mV) was also unchanged. These results indicated muscle intactness in response to the load imposed by tetanus. In G2 mice, there was an increase in the amplitude of contraction after 3 h and 9 h when compared to G1 at 83% tetanus. Conclusion: These results indicate that exposure of muscle to LLLT enhanced the contractile force and increased the resistance to muscle fatigue without causing morphological damage to cellular structures.

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A influência do laser 830nm no desempenho do salto de atletas de voleibol feminino

Cited by 17 publications

References 16 publications

Effects of low-level laser therapy (LLLT 808 nm) on lower limb spastic muscle activity in chronic stroke patients

Effects of low-level laser therapy (LLLT 808 nm) on lower limb spastic muscle activity in chronic stroke patients

Avaliação dos parâmetros termográficos e a percepção da fadiga muscular em atletas de badminton submetidos à laserterapia

Effect of low-level laser therapy (GaAlAs - λ660 nm) on muscle function

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