Heart Rate Variability in Children and Adolescents With Cystic Fibrosis

Effects of a Resistance Training Program on Heart Rate Variability in Children and Adolescents With Cystic Fibrosis

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.

Inclusion Criteria:

• Diagnosis of Cystic Fibrosis
• Age between 6 and 18 years old
• Mild to moderate lung function levels
• Signature of the informed consent form by legal guardian and patient.

Exclusion Criteria:

• Active smoking
• Exacerbation in the last 3 months
• Presence of gastrostomy
• Use of beta-blocker drugs
• Diagnosed heart disease
• Alterations in the locomotor system