Only one other study has been
published reporting impacts in rugby union[xxvii]. However this study utilised an instrumented
mouthguard, not a wireless head impact sensor.
The mouthguard and the XPatch were from the same company (X2 Biosystems)
and had the same accelerometer and gyroscope embedded into them. Comparisons
for data from the current study are therefore limited to the instrumented
mouthguard study in rugby and studies utilising helmet fitted accelerometers in
youth ice hockey, youth, collegiate, and professional American football.