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Effects of the inspiratory muscle training and aerobic training on respiratory and functional parameters, inflammatory biomarkers, redox status and quality of life in hemodialysis patients: a randomized clinical trial |
Figueiredo PHS, Lima MMO, Costa HS, Martins JB, Flecha OD, Goncalves PF, Alves FL, Rodrigues VGB, Maciel EHB, Mendonca VA, Lacerda ACR, Vieira ELM, Teixeira AL, de Paula F, Balthazar CH |
PloS ONE 2018 Jul;13(7):e0200727 |
clinical trial |
8/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
OBJECTIVE: Evaluate and compare the isolated and combined effects of Inspiratory Muscle Training (IMT) and Aerobic Training (AT) on respiratory and functional parameters, inflamatory biomarkers, redox status and health-related quality of life (HRQoL) in hemodialysis patients. METHODS: A randomised controlled trial with factorial allocation and intention-to-treat analysis was performed in hemodialysis patients. Volunteers were randomly assigned to performe 8-weeks of IMT at 50% of maximal inspiratory pressure (MIP), low intensity AT or combined training (CT). Before the interventions, all the volunteers went 8-weeks through a control period (without training). Measures are taken at baseline, 8-week (after control period) and 16-week (after the interventions). Primary outcomes were functional capacity (incremental shuttle walk test), MIP and lower limbs strength (Sit-to-Stand test of 30 seconds). Plasma levels of interleukin-6 (IL-6), soluble tumor necrosis factor receptor 1 (sTNFR1) and 2 (sTNFR2), adiponectin, resistin and leptin, redox status parameters and HRQoL (KDQOL-SF questionnaire) were the scondary outcomes. Data analyses were performed by two-way repeated measurements ANOVA. RESULTS: 37 hemodialysis patients aged 48.2 years old (IC95% 43.2 to 54.7) were randomized. Increase of MIP, functional capacity, lower limbs strength and resistin levels, and reduction of sTNFR2 levels in 16-week, compared to baseline and 8-week, were observed in all the groups (p < 0.001). IMT improved functional capacity, MIP and lower limbs strength in 96.7m (IC95% 5.6 to 189.9), 34.5cmH2O (IC95% 22.4 to 46.7) and 2.2repetitions (IC95% 1.1 to 3.2) respectively. Increase in resistin leves and reduction in sTNFR2 leves after IMT was 0.8ng/dL (IC95% 0.5 to 1.1) and 0.8ng/dL (IC95% 0.3 to 1.3), respectively, without between-group differences. Compared to baseline and 8-week, adiponectin levels (p < 0.001) and fatigue domain of the HRQoL (p < 0.05) increased in 16-week only in CT. CONCLUSION: IMT, AT and CT improved functional parameters and modulated inflammatory biomarkers, in addition, IMT provoked a similar response to low intensity AT in hemodialysis patients. TRIAL REGISTRATION: Registro Brasileiro de Ensaios clinicos RBR-4hv9rs.
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