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Appliance of science can benefit rugby
Rescinding Freddie Stewart’s red card against Ireland in Dublin was the correct decision. It takes time to react to unpredictable events: up to 50 milliseconds (ms) for an image to reach the brain’s visual centre, another 100ms to reach the regions that ‘decide’ how to react, then 80ms more for that ‘reaction’ message to travel through spinal cord and nerves to muscles, which only then start to contract. In total, that’s around 230ms (0.2sec).
And even the simplest avoiding movement takes another 0.5sec.
