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Ventilatory Responses During Submaximal Exercise in Children With Prader-Willi Syndrome

Adam M Hyde1, Robert G McMurray2, Frank A Chavoya1

  • 11 California State University, Fullerton.

Pediatric Exercise Science
|February 28, 2018
PubMed

Insights

Children with Prader-Willi syndrome (PWS) show normal ventilatory responses during exercise, despite higher breathing rates. This suggests neural stimulation and metabolic cost may explain their hyperventilation.

Area of Science:

  • Pediatric Pulmonology
  • Neurogenetics
  • Exercise Physiology

Background:

  • Prader-Willi syndrome (PWS) is a genetic disorder characterized by hypothalamic dysfunction, obesity, and neurobehavioral issues.
  • Individuals with PWS often exhibit hypoventilation and hypercapnia at rest.
  • Understanding exercise-induced ventilatory control in PWS is crucial for managing respiratory health.

Purpose of the Study:

  • To characterize and compare ventilatory responses during exercise in children with PWS versus control groups.
  • To investigate potential differences in oxygen uptake, carbon dioxide output, ventilation, breathing frequency, and tidal volume during physical activity.

Main Methods:

  • A study involving children aged 7-12 years with PWS (n=8) and without PWS (normal weight, n=9; obese, n=9).
  • Participants completed three 5-minute exercise bouts at varying speeds (3.2, 4.0, 4.8 km/h).
  • Continuous monitoring of respiratory parameters including oxygen uptake, carbon dioxide output, ventilation, breathing frequency, and tidal volume.

Main Results:

  • Children with PWS demonstrated slightly higher oxygen uptake at 3.2 and 4.8 km/h compared to normal-weight controls.
  • Ventilation and breathing frequency were significantly higher in the PWS group across all exercise intensities.
  • Tidal volume and the ventilatory response relative to carbon dioxide output were similar between PWS and control groups.

Conclusions:

  • Children with Prader-Willi syndrome do not exhibit impaired ventilatory responses during exercise.
  • The observed hyperventilation in PWS during exercise may be linked to increased neural drive and metabolic demands.
  • These findings contribute to a better understanding of respiratory physiology in PWS during physical activity.
Abstract

Keywords:
geneticobesitypediatricrespiratory

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