Two teams in the National Football League have adopted a device that cools players' hands as a way to lower the temperature of their bodies' cores and quickly boost performance. The CoreControl device is aimed specifically at the high incidence of cramping and heat illness in the league. "Since we started using the CoreControl, I have administered fewer IVs, which means our players can stay on the field longer," said Dan Garza, medical director for the San Francisco 49ers. "I wouldn’t be surprised if every NFL and college football team is using CoreControl in the not-so-distant future."

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