The temporal and bi-directional relationship between physical activity and sleep in ambulatory children with cerebral...

Area of Science:

• Pediatric physical therapy
• Sleep science
• Biomedical engineering

Background:

• Cerebral palsy (CP) significantly impacts motor function and daily activities in children.
• Understanding the interplay between physical activity and sleep is crucial for managing CP.
• Device-based measures offer objective insights into these behaviors.

Purpose of the Study:

• To investigate the temporal and bi-directional relationship between physical activity and sleep in ambulatory children with CP.
• To explore how sleep parameters influence subsequent physical activity levels.
• To examine how physical activity affects subsequent sleep quality and duration.

Main Methods:

• Utilized ActiGraph GT3X accelerometers to collect 24-hour activity and sleep data for seven consecutive days and nights.
• Included 51 ambulatory children with CP (43% girls, mean age 6.8 years, GMFCS levels I-III).
• Employed linear mixed models to analyze the associations between sleep and activity metrics.

Main Results:

• Light and moderate-to-vigorous physical activity were negatively associated with sleep efficiency (SE) and total sleep time (TST) the following night.
• Sedentary time showed a positive association with SE and TST the following night.
• Sleep parameters (SE, TST) were positively associated with sedentary time and negatively with moderate-to-vigorous physical activity the following day.

Conclusions:

• The relationship between physical activity and sleep in children with CP is complex and bi-directional.
• Increased physical activity does not necessarily lead to improved sleep in this population.
• Further research is needed to fully elucidate these intricate associations and inform interventions.