The purpose of this study is to determine the phototherapy may be adjuvant to exercise to improve muscular efficiency and increase aerobic capacity. We hypothesized that phototherapy adjuvant with physical exercise may be benefit to populations with Diabetes mellitus that have impairment in cardiopulmonary fitness and low oxygen uptake peak values (VO2peak) in exercise tests. Two doses will be tested 150J and 300J. Additionally, this study aims to evaluate the effect of phototherapy previously applied to the exercise on the cardiovascular coupling. We hypothesize that phototherapy previously applied to the exercise will result in the increase baroreflex sensitivity (increased coherence and gain and decreased phase), promoting the improvement of the cardiovascular autonomic control and cardiovascular coupling in diabetic subjects. Two doses will be tested 150J and 300J.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
60
The near-infrared radiation by light emitting diode (LED) will be performed with a cluster multi-diode arranged in an array of 34x18 cm containing 50 LEDs (GaAlAs, 850 nm). The phototherapy will be applied bilaterally on femoral quadriceps and triceps surae muscles during 40 seconds with 3J of total energy for each diode and 150 J of total energy delivery to muscle. Neither subject nor evaluators will known if LED was effective or placebo during data collection. A hidden button in the LED device is employed to ensure the double-blind procedure. This button allows selecting placebo or effective emission of near-infrared radiation while the time display is working. This button will be selected by a researcher who just participated of randomization procedure and LED application and had no access to data collection.
The near-infrared radiation by light emitting diode (LED) will be performed with a cluster multi-diode arranged in an array of 34x18 cm containing 50 LEDs (GaAlAs, 850 nm). The phototherapy will be applied bilaterally on femoral quadriceps and triceps surae muscles during 40 seconds with 3J of total energy for each diode and 150 J of total energy delivery to muscle. Neither subject nor evaluators will known if LED was effective or placebo during data collection. A hidden button in the LED device is employed to ensure the double-blind procedure. This button allows selecting placebo or effective emission of near-infrared radiation while the time display is working. This button will be selected by a researcher who just participated of randomization procedure and LED application and had no access to data collection.
The near-infrared radiation by light emitting diode (LED) will be performed with a cluster multi-diode arranged in an array of 34x18 cm containing 50 LEDs (GaAlAs, 850 nm). The phototherapy will be applied bilaterally on femoral quadriceps and triceps surae muscles during 80 seconds with 6J of total energy for each diode and 300 J of total energy delivery to muscle. Neither subject nor evaluators will known if LED was effective or placebo during data collection. A hidden button in the LED device is employed to ensure the double-blind procedure. This button allows selecting placebo or effective emission of near-infrared radiation while the time display is working. This button will be selected by a researcher who just participated of randomization procedure and LED application and had no access to data collection.
The near-infrared radiation by light emitting diode (LED) will be performed with a cluster multi-diode arranged in an array of 34x18 cm containing 50 LEDs (GaAlAs, 850 nm). The phototherapy will be applied bilaterally on femoral quadriceps and triceps surae muscles during 80 seconds with 6J of total energy for each diode and 300 J of total energy delivery to muscle. Neither subject nor evaluators will known if LED was effective or placebo during data collection. A hidden button in the LED device is employed to ensure the double-blind procedure. This button allows selecting placebo or effective emission of near-infrared radiation while the time display is working. This button will be selected by a researcher who just participated of randomization procedure and LED application and had no access to data collection.
Universidade Federal de São Carlos
São Carlos, São Paulo, Brazil
RECRUITINGChange in muscle oxygen uptake after phototherapy and placebo phototherapy with light emitting diode (LED) - 150J
20 men with diabetes mellitus will receive effective-phototherapy (cluster multi-diode containing 50 LEDs applied for 40 seconds over muscle quadriceps bilaterally) or Placebo-phototherapy using the same device and procedures. Effective and placebo phototherapy will be performed 2 times each and the sequence will be random, with 14 days of rest between evaluations. The therapies will be applied 10 minutes before dynamic physical exercise of constant workload and moderate intensity to evaluate the phototherapy effect in muscle oxygen uptake evaluated through near-infrared spectroscopy (NIRS) (Oxymon system, Artinis Medical Systems, Netherlands). The optode of NIRS will be fixed on quadriceps muscle in the right side.
Time frame: Change in muscle oxygen uptake after phototherapy and placebo phototherapy initial, 2 weeks, 4 weeks and 6 weeks
Change in muscle oxygen uptake after phototherapy and placebo phototherapy with light emitting diode (LED) - 300J
20 men with diabetes mellitus will receive effective-phototherapy (cluster multi-diode containing 50 LEDs applied for 80 seconds over muscle quadriceps bilaterally) or Placebo-phototherapy using the same device and procedures. Effective and placebo phototherapy will be performed 2 times each and the sequence will be random, with 14 days of rest between evaluations. The therapies will be applied 10 minutes before dynamic physical exercise of constant workload and moderate intensity to evaluate the phototherapy effect in muscle oxygen uptake evaluated through near-infrared spectroscopy (NIRS) (Oxymon system, Artinis Medical Systems, Netherlands). The optode of NIRS will be fixed on quadriceps muscle in the right side.
Time frame: Change in muscle oxygen uptake after phototherapy and placebo phototherapy initial, 2 weeks, 4 weeks and 6 weeks
Change in pulmonary oxygen uptake after phototherapy and placebo phototherapy with light emitting diode (LED) - 150J
20 men with diabetes mellitus and 20 health men will receive effective-phototherapy (cluster multi-diode containing 50 LEDs applied for 40 seconds over muscle quadriceps bilaterally) or Placebo-phototherapy using the same device and procedures. Effective and placebo phototherapy will be performed 2 times each and the sequence will be random, with 14 days of rest between evaluations. The therapies will be applied 10 minutes before dynamic physical exercise of constant workload and moderate intensity to evaluate the phototherapy effect in pulmonary oxygen uptake evaluated through metabolic unit (CPX/D, MedGraphics, St. Paul, Minnesota, USA) continuously collected breath-by-breath.
Time frame: Change in pulmonary oxygen uptake after phototherapy and placebo phototherapy initial, 2 weeks, 4 weeks and 6 weeks
Change in pulmonary oxygen uptake after phototherapy and placebo phototherapy with light emitting diode (LED) - 300J
20 men with diabetes mellitus and 20 health men will receive effective-phototherapy (cluster multi-diode containing 50 LEDs applied for 80 seconds over muscle quadriceps bilaterally) or Placebo-phototherapy using the same device and procedures. Effective and placebo phototherapy will be performed 2 times each and the sequence will be random, with 14 days of rest between evaluations. The therapies will be applied 10 minutes before dynamic physical exercise of constant workload and moderate intensity to evaluate the phototherapy effect in pulmonary oxygen uptake evaluated through metabolic unit (CPX/D, MedGraphics, St. Paul, Minnesota, USA) continuously collected breath-by-breath.
Time frame: Change in pulmonary oxygen uptake after phototherapy and placebo phototherapy initial, 2 weeks, 4 weeks and 6 weeks
Change in baroreflex sensitivity after phototherapy and placebo phototherapy with light emitting diode (LED) - 150J
20 men with diabetes mellitus and 20 health men will receive effective-phototherapy (cluster multi-diode containing 50 LEDs applied for 40 seconds over muscle quadriceps bilaterally) or Placebo-phototherapy using the same device and procedures. Effective and placebo phototherapy will be performed 2 times each and the sequence will be random, with 14 days of rest between evaluations. The therapies will be applied 10 minutes before dynamic physical exercise of constant workload and moderate intensity to evaluate the phototherapy effect in baroreflex sensitivity evaluated through pulse plethysmograph (Finometer PRO, Finapres Medical Systems, The Netherlands).
Time frame: Time Frame: Change in pulmonary oxygen uptake after phototherapy and placebo phototherapy initial, 2 weeks, 4 weeks and 6 weeks
Change in baroreflex sensitivity after phototherapy and placebo phototherapy with light emitting diode (LED) - 300J
20 men with diabetes mellitus and 20 health men will receive effective-phototherapy (cluster multi-diode containing 50 LEDs applied for 80 seconds over muscle quadriceps bilaterally) or Placebo-phototherapy using the same device and procedures. Effective and placebo phototherapy will be performed 2 times each and the sequence will be random, with 14 days of rest between evaluations. The therapies will be applied 10 minutes before dynamic physical exercise of constant workload and moderate intensity to evaluate the phototherapy effect in baroreflex sensitivity evaluated through pulse plethysmograph (Finometer PRO, Finapres Medical Systems, The Netherlands).
Time frame: Time Frame: Change in pulmonary oxygen uptake after phototherapy and placebo phototherapy initial, 2 weeks, 4 weeks and 6 weeks
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