The mechanical response characteristics of a Hybrid III headform and mechanical neck to the left jab and left hook punches have been studied. Three Canadian amateur boxers artici ated in the study by delivering such blows to the head and neck of the Hybrid III which was solidly mounted to a concrete table. Angular and linear acceleration measures were taken simultaneously using a specifically designed nine accelerometer array mounted to the headform.

Both peak resultant linear accelerations and peak resultant angular accelerations were higher for the left hook punch than for the left jab punch. The results for both the left jab and the left hook demonstrated that neither punch was capable of causing head accelerations which were of concussive strength using published tolerance data.

The results demonstrate that the probability of receiving a concussive injury from a single punch of the types dehvered in this study is quite low;​ however, the acceleration levels may be high enough to cause mild cerebral concussion in some instances.