Lasers in Medical Science

, Volume 28, Issue 2, pp 415–422 | Cite as

Infrared LED irradiation applied during high-intensity treadmill training improves maximal exercise tolerance in postmenopausal women: a 6-month longitudinal study

  • Fernanda Rossi PaolilloEmail author
  • Adalberto Vieira Corazza
  • Audrey Borghi-Silva
  • Nivaldo Antonio Parizotto
  • Cristina Kurachi
  • Vanderlei Salvador Bagnato
Original Article


Reduced aerobic fitness is associated with an increased risk of cardiovascular diseases among the older population. The aim of this study was to investigate the effects of LED irradiation (850 nm) applied during treadmill training on the maximal exercise tolerance in postmenopausal women. At the beginning of the study, 45 postmenopausal women were assigned randomly to three groups, and 30 women completed the entire 6 months of the study. The groups were: (1) the LED group (treadmill training associated with phototherapy, n = 10), (2) the exercise group (treadmill training, n = 10), and (3) the sedentary group (neither physical training nor phototherapy, n = 10). The training was performed for 45 min twice a week for 6 months at intensities between 85% and 90% maximal heart rate (HRmax). The irradiation parameters were 39 mW/cm2, 45 min and 108 J/cm2. The cardiovascular parameters were measured at baseline and after 6 months. As expected, no significant differences were found in the sedentary group (p ≥ 0.05). The maximal time of tolerance (Tlim), metabolic equivalents (METs) and Bruce stage reached significantly higher values in the LED group and the exercise group (p < 0.01). Furthermore, the HR, double product and Borg score at isotime were significantly lower in the LED group and in the exercise group (p < 0.05). However, the time of recovery showed a significant decrease only in the LED group (p = 0.003). Moreover, the differences between before and after training (delta values) for the Tlim, METs and HR at isotime were greater in the LED group than in the exercise group with a significant intergroup difference (p < 0.05). Therefore, the infrared LED irradiation during treadmill training can improve maximal performance and post-exercise recovery in postmenopausal women.


Infrared LED Treadmill training Aerobic capacity Postmenopausal women 



We would like to thank the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, grant nos. 98/14270-8 and 09/01842-0), the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, grant no. 150949/2011-1) and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for financial support. We also acknowledge the valuable technical assistance graciously provided by Ms. Juliana Cristina Milan (physical therapist) and Ms. Isabela Verzola Aniceto (medical doctor).


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Copyright information

© Springer-Verlag London Ltd 2012

Authors and Affiliations

  • Fernanda Rossi Paolillo
    • 1
    • 2
    • 6
    Email author
  • Adalberto Vieira Corazza
    • 3
  • Audrey Borghi-Silva
    • 4
  • Nivaldo Antonio Parizotto
    • 2
    • 5
  • Cristina Kurachi
    • 1
    • 2
  • Vanderlei Salvador Bagnato
    • 1
    • 2
  1. 1.Optics Group, Instituto de Física de São Carlos (IFSC)University of São Paulo (USP)São CarlosBrazil
  2. 2.Biotechnology ProgramFederal University of São Carlos (UFSCar)São CarlosBrazil
  3. 3.Department of Morphology, Faculty of Dentistry of PiracicabaState University of Campinas (UNICAMP)PiracicabaBrazil
  4. 4.Cardiopulmonary Physiotherapy Laboratory, Department of Physical TherapyFederal University of São Carlos (UFSCarSão CarlosBrazil
  5. 5.Electrothermophototherapy Laboratory, Department of Physical TherapyFederal University of São Carlos (UFSCarSão CarlosBrazil
  6. 6.University of São Paulo (USP)São CarlosBrazil

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