Effect of low-level laser therapy on muscle adaptation to knee extensor eccentric training

Baroni, Bruno Manfredini; Rodrigues, Rodrigo; Freire, Bruno; Franke, Rodrigo de Azevedo; Geremia, Jeam Marcel; Vaz, Marco Aurélio

doi:10.1007/s00421-014-3055-y

Cited by 63 publications

(48 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our outcomes partially agree with the findings observed by Baroni et al [41]. Despite lack of significant results observed in muscle mass assessment, our outcomes demonstrated greater improvement in isometric muscular strength (39 to 46 %) than found previously (20.5 %).…”

Section: Discussionsupporting

confidence: 90%

See 1 more Smart Citation

What is the best moment to apply phototherapy when associated to a strength training program? A randomized, double-blinded, placebo-controlled trial

et al. 2016

View full text Add to dashboard Cite

The effects of phototherapy (or photobiomodulation therapy) with low-level laser therapy (LLLT) and/or light-emitting diodes (LEDs) on human performance improvement have been widely studied. Few studies have examined its effect on muscular training and no studies have explored the necessary moment of phototherapy irradiations (i.e., before and/or after training sessions). The aim of this study was to determine the optimal moment to apply phototherapy irradiation when used in association with strength training. Forty-eight male volunteers (age between 18 to 35 years old) completed all procedures in this study. Volunteers performed the strength training protocol where either a phototherapy and/or placebo before and/or after each training session was performed using cluster probes with four laser diodes of 905 nm, four LEDs of 875 nm, and four LEDs of 640 nm-manufactured by Multi Radiance Medical™. The training protocol duration was 12 weeks with assessments of peak torque reached in maximum voluntary contraction test (MVC), load in 1-repetition maximum test (1-RM) and thigh circumference (perimetry) at larger cross-sectional area (CSA) at baseline, 4 weeks, 8 weeks, and 12 weeks. Volunteers from group treated with phototherapy before and placebo after training sessions showed significant (p < 0.05) changes in MVC and 1-RM tests for both exercises (leg extension and leg press) when compared to other groups. With an apparent lack of side effects and safety due to no thermal damage to the tissue, we conclude that the application of phototherapy yields enhanced strength gains when it is applied before exercise. The application may have additional beneficial value in post-injury rehabilitation where strength improvements are needed.

show abstract

Section: Discussionsupporting

confidence: 90%

“…Assessment methods such as X-ray absorptiometry (DEXA) [39,46] or ultrasonography imaging [41] may provide more accurate assessment and deserve to be considered in future studies. However, it is important to highlight that although perimetry assessment lacks sensitivity, this method is accepted and often utilized in clinical practice.…”

Section: Discussionmentioning

confidence: 99%

What is the best moment to apply phototherapy when associated to a strength training program? A randomized, double-blinded, placebo-controlled trial

et al. 2016

View full text Add to dashboard Cite

show abstract

“…PBM in conjunction with exercise training programs have demonstrated positive effects on quadriceps femoris muscles regarding 1-RM, torque, fatigue resistance [14,15,54,55,57,59], and ambiguous effects on hypertrophy and muscle work [14,15,57,59]. We could identify a large range in light dose (J) applied on quadriceps femoris muscles in chronic response (18–240 J) [Figure 9].…”

Section: Discussionmentioning

confidence: 99%

Photobiomodulation in human muscle tissue: an advantage in sports performance?

Ferraresi

Huang

Hamblin

2016

Journal of Biophotonics

113

View full text Add to dashboard Cite

Photobiomodulation (PBM) describes the use of red or near-infrared (NIR) light to vstimulate, heal, and regenerate damaged tissue. Both pre-conditioning (light delivered to muscles before exercise) and PBM applied after exercise can increase sports performance in athletes. This review covers the effects of PBM on human muscle tissue in clinical trials in volunteers related to sports performance and in athletes. The parameters used were categorized into those with positive effects or no effects on muscle performance and recovery. Randomized controlled trials and case-control studies in both healthy trained and untrained participants, and elite athletes were retrieved from MEDLINE up to 2016. Performance metrics included fatigue, number of repetitions, torque, hypertrophy; measures of muscle damage and recovery such as creatine kinase and delayed onset muscle soreness. Searches retrieved 533 studies, of which 46 were included in the review (n=1045 participants). Studies used single laser probes, cluster of laser-diodes, LED-clusters, mixed clusters (lasers and LEDs), and flexible LED arrays. Both red, NIR, and red/NIR mixtures were used. PBM can increase muscle mass gained after training, and decrease inflammation and oxidative stress in muscle biopsies. We raise the question of whether PBM should be permitted in athletic competition by international regulatory authorities.

show abstract

“…Furthermore, photobiomodulation therapy applied before sessions of training programs such as strength training, also lead to enhancement of outcomes like muscular torque and muscular thickness. 15 Therefore, the current scientific evidence totally supports the use of photobiomodulation therapy when applied before exercises.…”

mentioning

confidence: 92%

Photobiomodulation Therapy in Skeletal Muscle: From Exercise Performance to Muscular Dystrophies

Leal-Junior

2015

Photomedicine and Laser Surgery

View full text Add to dashboard Cite

Effect of low-level laser therapy on muscle adaptation to knee extensor eccentric training

Abstract: LLLT applied before eccentric training sessions seems to improve the hypertrophic response and muscular strength gain in healthy subjects.

Cited by 63 publications

References 44 publications

What is the best moment to apply phototherapy when associated to a strength training program? A randomized, double-blinded, placebo-controlled trial

What is the best moment to apply phototherapy when associated to a strength training program? A randomized, double-blinded, placebo-controlled trial

Photobiomodulation in human muscle tissue: an advantage in sports performance?

Photobiomodulation Therapy in Skeletal Muscle: From Exercise Performance to Muscular Dystrophies

Contact Info

Product

Resources

About