This study aims to assess the effects of a resistance exercise training program on heart rate variability in a group of children and adolescents with cystic fibrosis. The study design is a randomized controlled trial.
A randomized controlled study will be carried out in children diagnosed with cystic fibrosis aged 6 to 18 years. Individuals will be divided into two groups: control group (CON) and strength training (ST). Heart rate variability will be analyzed using KUBIOS and measured using a Suunto watch, with subjects in lying position without movements or speaking for 5 minutes. Patients in the ST group will complete an individualized guided strength program for 8 weeks (3 sessions of 60 min/week). Training prescription will be individualized and based on the 5 repetition maximum test (60-80%). Upper and lower limbs exercises will be used, including seated bench press, seated lateral row and leg press. Outcome measures will be performed at baseline and after 8 weeks.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
19
Resistance exercise program for 8 weeks, 3 times a week, with a 60 min session duration.
Escuela de Doctorado e Investigacion, Universidad Europea
Villaviciosa de Odón, Madrid, Spain
Change in the standard deviation of R-R intervals (SDNN) expressed in milliseconds (m/s)
Changes in time-domain SDNN will be measured through heart rate variability assessment using a heart rate band and an Ambit 3 Sport watch. Variables will be collected during a five minute period.
Time frame: Baseline and 8 weeks
Change in the root mean square standard deviation (RMSSD) expressed in milliseconds (m/s)
Changes in time-domain RMSSD will be measured through heart rate variability assessment using a heart rate band and an Ambit 3 Sport watch. Variables will be collected during a five minute period.
Time frame: Baseline and 8 weeks
Change in the percentage of differences between R-R intervals higher than 50 m/s (PNN50) expressed in percentage (%)
Changes in time-domain PNN50 will be measured through heart rate variability assessment using a heart rate band and an Ambit 3 Sport watch. Variables will be collected during a five minute period.
Time frame: Baseline and 8 weeks
Change in the low frequency band (LF) expressed in normalized unites (nu)
Changes in frequency-domain LF will be measured through heart rate variability assessment using a heart rate band and an Ambit 3 Sport watch. Variables will be collected during a five minute period.
Time frame: Baseline and 8 weeks
Change in the high frequency band (HF) expressed in normalized unites (nu)
Changes in frequency-domain HF will be measured through heart rate variability assessment using a heart rate band and an Ambit 3 Sport watch. Variables will be collected during a five minute period.
Time frame: Baseline and 8 weeks
Change in the quotient (LF/HF) between the low frequency band (LF) and the high frequency band (HF) expressed as a ratio
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Changes in frequency-domain HF will be measured through heart rate variability assessment using a heart rate band and an Ambit 3 Sport watch. Variables will be collected during a five minute period.
Time frame: Baseline and 8 weeks
Change in the forced expiratory volume in one second (FEV1) expressed as z-score
Changes in FEV1 will be measured using spirometry
Time frame: Baseline and 8 weeks
Change in the forced vital capacity (FVC) expressed as z-score
Changes in FVC will be measured using spirometry
Time frame: Baseline and 8 weeks