Objective To assess Multi-directional Impact Protection System (MIPS) helmet technology on rotational velocity during head impact using a novel testing method. Design Optimization study. Setting ...

Background A previous study [Zemková E et al. 2019] identified between-side differences in trunk rotational power in athletes trained in asymmetric sports. However, the question remains whether ...

Because of the fast rotational velocities the 9 mm can produce, the modern bullets it fires tend to expand quite well over a wide velocity range from long and short barrels. This expansion is critical ...