RESUMEN
Photobiomodulation (PBM) has been used in different populations as a strategy to attenuate muscle fatigue and improve exercise performance. Recent findings demonstrated that a single session with specific PBM doses during hemodialysis (HD) increased the upper limb muscle strength of chronic kidney failure (CKF) patients. Now, the primary objective of this study was to evaluate the chronic effect of PBM on the functional capacity of this population. Secondarily, we aimed at investigating the effects of PBM on the patients' strength, muscle thickness and echogenicity, perception of pain, fatigue, and quality of life. A randomized controlled trial was conducted in which the intervention group (IG, n = 14) received 24 sessions of PBM (810 nm, 5 diodes × 200 mW, 30 J/application site) on lower limb during HD. The control group (CG, n = 14) did not receive any physical therapy intervention, it only underwent HD sessions. As a result, there was an increase in the functional capacity (assessed through the six-minute walk test) for the IG compared with the CG [50.7 m (CI95% 15.63; 85.72), p = 0.01, large effect size, d = 1.12], as well as an improvement on lower limb muscle strength (assessed through the sit-and-stand test) [- 7.4 s (CI95% - 4.54; - 10.37), p = 0.00, large effect size, d = 1.99]. For other outcomes evaluated, no significant difference between-group was observed. Finally, PBM applied as monotherapy for 8 weeks in the lower limb improves functional capacity and muscle strength of CKF patients.
Asunto(s)
Fallo Renal Crónico/fisiopatología , Fallo Renal Crónico/radioterapia , Terapia por Luz de Baja Intensidad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Fatiga Muscular/efectos de la radiación , Fuerza Muscular/efectos de la radiación , Modalidades de Fisioterapia , Calidad de VidaRESUMEN
OBJECTIVE: To analyze the effects of cryolipolysis on the fat thickness of the lower abdomen of healthy women and patient's satisfaction. METHODS: Design and setting: a randomized controlled trial, with concealed allocation and blinded assessor. PARTICIPANTS: 34 healthy women between 18 and 48 years, skinfold in the lower abdomen ≥3cm, BMI between 18.5 and 27kg/m2, low level of physical activity, and no contraindication to cryolipolysis were allocated to intervention group (IG, n=17) or control group (CG, n=17). INTERVENTIONS: The IG received one session of cryolipolysis with -10°C of temperature for 50min. The CG was not submitted to any kind of intervention. Both groups did the evaluation protocols at baseline, 30, 60 and 90 days after the intervention. MAIN OUTCOME MEASURES: fat thickness was measured by ultrasonography (US), skinfold (SF) and abdominal circumference (AC1 and AC2). RESULTS: No significant differences between the IG and CG were demonstrated at any evaluation at any time of follow up for the variables US (30 days: 0.05cm (95%CI: -0.12; 0.22), 60 days: 0.05cm (95%CI: -0.11; 0.20) and 90 days: 0.04cm (95%CI: -0.7; 0.25)), SF (30 days: -0.09cm (95%CI: -0.25; 0.08), 60 days: -0.14cm (95%CI: -0.36; 0.09) and 90 days: -0.001cm (95%CI: -0.237; 0.234)), AC1 (30 days: 0.42cm (95%CI: -1.1; 1.9), 60 days: -0.1cm (95%CI: -1.74; 1.54) and 90 days: -0.007cm (-1.9; 1.9)) and AC2 (30 days: 0.183cm (95%CI: -0.84; 1.20), 60 days: -0.13cm (95%CI: -1.61; 1.35) and 90 days: -0.31cm (95%CI: -1.61; 1.00)). CONCLUSIONS: The current study showed that a single application of the utilized protocol of cryolipolysis does not produce any significant effect on fat thickness of the lower abdomen of healthy women. CLINICAL TRIAL REGISTRATION NUMBER: NCT03160976 (https://clinicaltrials.gov/ct2/show/NCT03160976). Contribution of the Paper: the study is one of the first studies in the literature with methodological rigor to report an unfavorable result for localized abdominal fat treatment with a single session of cryolipolysis.