Much has been written about concussions sustained by youths engaged in football. However, other less severe head impacts are frequently experienced by young athletes throughout the football season. And, important to note, studies have shown that far more head impacts occur during football practice drills than during games.
Kelley and her colleagues collected biomechanical data and videos to evaluate the number, location, and magnitude of head impacts sustained by nine youths during football practice drills. All youths were members of the same team and were on average about 11 years of age. Inside each athlete's helmet was a Head Impact Telemetry (HIT) System™, which measures head acceleration. This apparatus was worn for all football practices over an entire season of play, including preseason, regular season, and playoff practice drills. Every time the HIT System™ recorded a head impact greater than 10g, data collection was triggered and biomechanical data were transmitted to a sideline base unit for later analysis. Videos were recorded to ensure that helmets were worn at the time of impact and to pair videos of the drills with associated biomechanical data collected by the HIT System™.
Types - Practice - Drills - Tackling - Install
There were eleven types of practice drills: dummy/sled tackling, install, special teams, multiplayer tackle, Oklahoma, one-on-one, open-field tackling, passing, position skill work, scrimmage, and tackling drill stations. The authors provide descriptions and purposes of these drills in Table 1 in the paper (see attached).
The authors report that a total of 2,125 head impacts occurred while the nine young athletes participated in a total of 30 contact practices. The authors provide a summary of head impact exposure (HIE) data broken down by the eleven types of practice drills in Table 2 in their paper (see attached). The frequency of impacts was assessed by compiling the number of impacts per minute per player for each drill....
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