Describe changes in postconcussion activity levels and sleep
in a sample of pediatric sport-related concussion
(SRC) patients, and examine the predictive value of accelerometer-derived activity and sleep
on subsequent clinical outcomes at a follow-up clinic visit.
Outpatient concussion clinic.
Twenty athletes aged 12 to 19 years with diagnosed SRC.
Prospective study including visit 1 (<72 hours postinjury) and visit 2 (6-18 days postinjury). Linear regressions used to predict scores (ie, neurocognitive, vestibular/oculomotor) at visit 2 from accelerometer-derived data collected 0 to 6 days postinjury. Linear mixed models evaluated changes in activity and sleep
Symptom, neurocognitive, and vestibular/oculomotor scores; sleep
and activity data (Actigraph GT3x+)
The maximum intensity of physical activity
= .009) and time in bed decreased throughout recovery
= .026). Several physical activity
metrics from 0 to 6 days postinjury were predictive of worse vestibular/oculomotor scores at visit 2 (P
< .05). Metrics indicative of poor sleep
0 to 6 days postinjury were associated with worse reaction time at visit 2 (P
This exploratory study suggests physical activity
change from the acute to subacute postinjury time period in adolescent SRC patients. In our small sample, excess physical activity
and poor sleep
the first week postinjury may be associated with worse outcomes at follow-up in the subacute stage of recovery
. This study further supported the feasibility of research utilizing wearable technology in concussion patients, and future research in a large, diverse sample of concussion patients examined at concise time intervals postinjury is needed.