The Efficiency of Photobiomodulation for Shoulder Tendinopathy

In this study PBM is proposed as a treatment for tendinopathies. This was the first systematic review focusing solely on PBM treatment effects in shoulder tendinopathy. 

A systematic review with meta-analysis and primary outcome measures pain relief on 100-mm visual analogue scale (VAS) and relative risk for global improvement. Two independent assessors rated the included studies according to the PEDro scale. Intervention quality assessments were performed of PBM dosage and treatment procedures according to World Association for Laser Therapy guidelines. The included trials were sub-grouped by intervention quality and use of other physiotherapy methods. 

Seventeen randomised controlled trials (RCTs) met the inclusion criteria. Significant and clinically important pain relief was found with weighted mean differences (WMD) over placebo, for PBM as monotherapy. The WMD when PBM was used in a multimodal physiotherapy treatment regime reached statistical significance over placebo pain reduction on VAS. Relative risks for global improvement were statistically significant for laser as monotherapy or adjunctive in a physiotherapy regime. Secondary outcome measures of shoulder function were only significantly in favour of PBM when used as monotherapy.

This review shows that optimal PBM can offer clinically relevant pain relief and initiate a more rapid course of improvement, both alone and in combination with other physiotherapy interventions.



Effects of photobiomodulation on fatigue level

Aging is caused by a series of morphological and functional modifications that lead to a decline of muscle function, particularly in females. Muscle tissue in elderly people is more susceptible to fatigue and consequently, to an increased inability to maintain strength and motor control. In this context, therapeutic approaches able of attenuating muscle fatigue have been investigated. Among these photobiomodulation demonstrates positive results which interact with biological tissues, promoting the increase in cell energy production. Thus, the aim of this study was to investigate the effects of photobiomodulation in the fatigue level and muscle performance in elderly women.

Thirty subjects entered a crossover randomised, double-blinded, placebo- controlled trial. Photobiomodulation was delivered on the rectus femoris muscle of the dominant limb immediately before the fatigue protocol. In both sessions, peripheral muscle fatigue was analysed by surface electromyography (EMG) and blood lactate analysis. Muscle performance was evaluated using an isokinetic dynamometer. 

The results showed that photobiomodulation was able to reduce muscle fatigue by a significant increase of electromyographic fatigue index and decreasing significantly lactate concentration 6 minutes after the performance of the fatigue protocol, compared the placebo PBM session. It can be concluded that the photobiomodulation was effective in reducing fatigue levels.

Within our treatments here and various other science journals, we find that PBM enhances the strength of muscle tissue and repair of injury, accelerating you healing time. Whether its due to s sports injury, a work injury or a degenerative condition.

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Laser therapy improves performance and accelerates recovery

While growing evidence constantly supports the use of photobiomodulation laser therapy (PBM) for performance and recovery enhancement, there have only been laboratory controlled studies until recently. Therefore, the aim of this study was to analyse the effects of PBM in the performance and recovery of high level rugby players, during an anaerobic field test.

Twelve male, high level rugby athletes were recruited in this randomised, crossover, double-blinded, placebo-controlled trial. No interventions were performed before the Bangsbo Sprint Test (BST) at familiarisation phase (week 1). At weeks 2 and 3 pre-exercise PBM or placebo were randomly applied to each athlete.

PBM irradiation was performed at 17 sites of each lower limb, employing a cluster with 12 diodes (4 laser diodes of 905nm, 4 LED diodes of 875nm, and 4 LED diodes of 640nm, 30J per site).

Average time of sprints, best time of sprints and fatigue index were obtained from the BST. Blood lactate levels were assessed at baseline and at 3, 10, 30 and 60 minutes after BST. Athletes perceived fatigue was also assessed through a questionnaire.

PBM significantly improved average time of sprints and fatigue index in BST. It also significantly decreased the percentage of change in blood lactate levels and perceived fatigue.

This study along with many others to date has concluded that pre-exercise PBM with the combination of super-pulsed laser (low-level laser), red and infrared LEDs can enhance performance and accelerate recovery of high level rugby players in field test.

The full article can be viewed following the pubmed link: