Effects of photobiomodulation on muscle strength in post-menopausal women submitted to a resistance training program

  • Johny N. AlmeidaEmail author
  • Wagner L. Prado
  • Caio M. Terra
  • Matheus G. Oliveira
  • Renato A. Garcia
  • Carlos E. Pinfildi
  • João P. Botero
Original Article


The aim of this study was to compare the effects of resistance training of low volume and high intensity with or without photobiomodulation (PBM) on muscle strength and functional performance in post-menopausal women. Thirty-four post-menopausal women were randomized into resistance training (RTG, n = 17) or resistance training plus PBM (PBMG, n = 17). Individuals from both groups received the same RT protocol consisting of leg-press 45°, front lat pulldown, leg curl, chest press, and squat performed in two sets of 10 repetitions with a workload of 75% of one repetition maximum (1RM), twice per week, during 8 weeks. PBMG individuals also received, prior to the exercise session, PBM through a cluster containing 7 visible diodes (630 nm) and 7 infrared diodes (850 nm) with power of 100 mW each and energy of 4 J per diode, applied to the quadriceps femoris muscle; individuals from RTG received placebo PBM prior to the sessions, applied with the same device switched off. Muscle strength (1RM; isometric dynamometer), functional performance (Time Up and Go; Berg Balance Scale; 6-min walk test), and quality of life (World Health Organization Quality of Life-Bref) were performed before and after 8 weeks. Both groups increased muscle strength (p < 0.001) for all exercises, without group differences (p = 0.651). Quality of life (p = 0.015) and balance (p = 0.006) increased only in the RTG. The results suggest that PBM were not able for inducing additional benefits to RT to improve muscle strength in post-menopausal women.


Physical conditioning Phototherapy Post-menopause Sarcopenia Strength training Low-level laser therapy 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.


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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  • Johny N. Almeida
    • 1
    Email author
  • Wagner L. Prado
    • 2
    • 3
  • Caio M. Terra
    • 1
  • Matheus G. Oliveira
    • 1
  • Renato A. Garcia
    • 1
  • Carlos E. Pinfildi
    • 2
    • 3
  • João P. Botero
    • 2
    • 3
  1. 1.Health Science Graduation ProgramFederal University of São PauloSantosBrazil
  2. 2.Department of Human Movement ScienceFederal University of São PauloSantosBrazil
  3. 3.Human Movement Science and Rehabilitation Graduation ProgramFederal University of São PauloSantosBrazil

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