Photobiomodulation by light emitting diode applied sequentially does not alter performance in cycling athletes

Autor(es)

de Carvalho, Gabriela ; Gobbi, Aline ; Gobbi, Ronaldo Bucken ; Ngonga Alfredo, Damiao Miranda ; do Carmo Furquim, Thales Henrique ; Barbosa, Rafael Inacio ; Papoti, Marcelo ; de Jesus Guirro, Rinaldo Roberto

• Tipo de documento: Artigo Científico
• Fonte: Lasers in Medical Science; v. 35, n. 8, p. 11-pg., 2020-02-20.

Resumo

Analyze the effects of sequential application of photobiomodulation therapy (PBMT) at different wavelengths on the performance of cycling athletes. Cyclists (48 male, mean age 33.77 years) underwent a performance evaluation through an incremental test, VO2max, blood lactate analysis, perception of effort, infrared thermography, and isokinetic evaluations. Photobiomodulation (180 J) with infrared (IR 940 +/- 10 nm), red (RED 620 +/- 10 nm), mixed Red, and IR (RED/IR 620 + 940 nm) or Sham (disabled device) intervention occurred on three consecutive days and was applied to the quadriceps femoris bilaterally. Reevaluations were performed 24 h after the last application, with 1 week of follow-up. A significance level of 5% was adopted, and the effect size (ES) was calculated by Cohen's d. Results: There were no significant differences in the analyzed variables under any experimental condition (p > 0.005), but a moderate effect size was observed for torque peak at 60 degrees/s on left lower limb (LLL) (ES = 0.67), average power at 60 degrees/s of the right lower limb (RLL) (0.73), and LLL (ES = 0.65) and a considerable effect size in torque peak at 60 degrees/s of the RLL (ES = 0.98) in the IR/RED group compared with sham 24 h after the last application. Moreover, a large effect size was observed for total time to exhaustion (ES = 1.98) and for VO2max (ES = 6.96), and a moderate effect size was seen for anaerobic threshold (ES = 0.62) in the IR/RED group compared with sham. Photobiomodulation, when not associated with training, was not able to produce a cumulative effect on the performance of cycling athletes. However, the association of two wavelengths seems to be better for increased performance. Identifier: NCT03225976 (AU)

• Processo FAPESP: 17/13997-4 - Efeito da fototerapia com diodo emissor de luz (LED) sobre as capacidades de força e resistência em atletas de ciclismo
• Beneficiário: Gabriela de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Mestrado