Quadriceps femoris performance after resistance training with and without photobiomodulation in elderly women: a randomized clinical trial

Author(s)

Tucci, Helga Tatiana ^[1] ; Figueiredo, Danielle S. ^[1] ; Carvalho, Raquel de Paula ^[1] ; Souza, Ana C. F. ^[2] ; Vassao, Patricia G. ^[2] ; Renno, Ana C. M. ^[2] ; Ciol, Marcia A. ^[3]

Affiliation

^[1] Univ Fed Sao Paulo, Dept Human Movement Sci, Santos - Brazil

^[2] Univ Fed Sao Paulo, Dept Biosci, Santos - Brazil

^[3] Univ Washington, Dept Rehabil Med, Seattle, WA 98195 - USA

• Document type: Journal article
• Source: Lasers in Medical Science; v. 34, n. 8, p. 1583-1594, OCT 2019.
• Web of Science Citations: 0

Abstract

The study assessed if quadriceps femoris muscle performance of older women can be improved by applying photobiomodulation therapy after a resistance training program. This study is a randomized, controlled trial with concealed allocation, intention-totreat analysis, and blinded outcome evaluators. Forty-five healthy sedentary older women classified as active or insufficiently active were randomized to groups receiving 8 weeks of quadriceps femoris resistance training plus active group or placebo group, or a control group (no training or photobiomodulation). Surface electromyographic fatigue indexes of vastus medialis, rectus femoris, and vastus lateralis; one-maximum repetition (1-MR); and analysis of inflammatory biomarkers (IL-6, IL-8, and TNF-a cytokines, plus CK and LDH enzymes) were measured at baseline and twice in a 24 h-period after 8 weeks. No differences among the three groups were found in fatigue indexes for all three muscles, although in general, the active group presented improved fatigue indexes from baseline to 8-week outcome, while the other groups did not. Both training groups improved in 1MR over the 8-week period. Inflammatory biomarkers were not different at long- or short-term among the three groups, except differences in groups for long-term IL-8 changes, differences in time for long-term LDH and short-term TNF-a changes, and interactions of time by group for short-term LDH changes. Quadriceps femoris performance of older women was not improved when photobiomodulation was associated to the proposed quadriceps femoris resistance training, when compared to training without photobiomodulation and a sedentary group. (AU)

• FAPESP's process: 12/12472-1 - Effects of low level laser therapy in peripheral muscle fatigue in elderly women submitted to a program of quadriceps femoris strength training
• Grantee: Helga Tatiana Tucci
• Support Opportunities: Regular Research Grants