To evaluate the impact on symptom
resolution of activity
acutely following a concussion
and the role of acute-phase symptoms on this relationship among active duty service members
Sixty-two SMs aged 18 to 44 years who sustained a concussion
within 72 hours of enrollment.
Longitudinal design with data collected within 72 hours of injury (baseline, n
= 62) and at 1 week (n
= 57), 1 month (n
= 50), 3 months (n
= 41), and 6 months (n
= 40) postinjury.
level using a 60-item Activity
level at baseline and during follow-up using Neurobehavioral Symptoms Inventory.
Significant interaction (Pi
< .05) was found, with significant main effects (P
< .05) limited to SMs with elevated baseline symptomatology. Among these participants, greater baseline total activity
was significantly related to greater vestibular symptoms at 1, 3, and 6 months (β = .61, .63, and .59, respectively). Significant associations were also found for particular types of baseline activity
(eg, physical; vestibular/balance; military
-specific) and symptoms at 1, 3, and/or 6 months postinjury.
These results provide support for clinical guidance that symptomatic SMs, particularly those with high levels of acute symptoms, may need to avoid excessive activity
acutely following concussion