Cystic Fibrosis is a hereditary, chronic respiratory illness. Cystic Fibrosis leads to a progressive decline in lung function. School-aged children with cystic fibrosis experience backpack carrying everyday. Backpack carrying induce a restrictive effect responsible for lower lung function. Respiratory muscle strength is also impaired. No studies assessed aerobic capacities during children's gait while carrying a backpack. The investigators hypothesized that backpack carrying will induce an acute decline in lung function in children with cystic fibrosis compared to healthy children. Investigators also hypothesized that aerobic capacities will be impaired.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
27
A 12,5% of body weight backpack will be used for each measurement. Lung function will be assessed while carrying a double strap backpack, a mono shoulder backpack and without a backpack.
Le Havre Hospital
Le Havre, France
Lung Function (Forced Vital Capacity)
Time frame: Immediate assessment while standing
Lung function (Forced Expiratory Volume in 1 second)
Time frame: Immediate assessment while standing
Respiratory Muscle Strength (MIP)
Maximal inspiratory pressure
Time frame: Immediate assessment while standing
Respiratory Muscle Strength (MEP)
Maximal expiratory pressure
Time frame: Immediate assessment while standing
Oxygen uptake (VO2)
Time frame: During 12min treadmill gait
Ratio Ventilation/VO2 (Ventilation equivalent for oxygen)
Number of liters of air must be ventilated to consume 1 Liter of O2
Time frame: During 12min treadmill gait
Ratio Ventilation/VCO2 (Ventilation equivalent for carbon dioxide)
Number of liters of air must be ventilated to reject 1 Liter of CO2
Time frame: During 12min treadmill gait
Dyspnea (Borg Scale)
Time frame: During 12min treadmill gait
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