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In this video, sports science (company) wondered rather than having athletic goalies in net, if they put a big goalie in net that covered over 90% of the net, would they stop a shot of over 70mph? They’re results clearly showed that a athletic goalie is better than a big one, this ties in with reflex and reaction time. As it is a key in the game of hockey. I found this video very informative and entertaining. A great video, demonstrating that size/mass is not a big factor.