Purpose This study compares the frequency and severity of head impacts sustained by
football players on days with and without diagnosed concussion and to identify the …

Purpose Concussions are commonly undiagnosed in an athletic environment because the
post-injury signs and symptoms may be mild, masked by the subject, or unrecognized. This …

METHODS We monitored all football related head impacts in 78 high school athletes (mean
age 16.7 years) from 2005 through 2008 in order to better understand the biomechanical …

Impacts to the head are common in collision sports such as football. Emerging research has
begun to elucidate concussion tolerance levels, but sub-concussive impacts that do not …

OBJECTIVE There exists a need to better understand the biomechanical forces associated
with head impacts in American football. The purpose of this study was to investigate whether …

OBJECTIVE: To compare the frequency and magnitude of head impacts between National
Collegiate Athletic Association Division I and American high school football players. The …

Context: Measuring head impact exposure is a critical step toward understanding the
mechanism and prevention of sport-related mild traumatic brain (concussion) injury, as well …

Recent studies using a helmet-based accelerometer system (Head Impact Telemetry System
[HITS]) have demonstrated that concussions result from a wide range of head impact …

OBJECTIVE: To determine the relationship between recorded head accelerations and
impact locations and acute clinical outcome of symptomatology, neuropsychological, and …

Concussion is a heterogeneous injury occurring throughout a range of impact magnitudes.
Consequently, research focusing on a single or set of variables at the time of injury to …