Take a cold plunge
Cold plunging is a simple (if daunting!) way to shock your system, increasing alertness and attentiveness. Cold-water immersion also improves circulation, which can help with muscle recovery after a tough workout. One small study found that participants who switched to cold showers for a few months had 29 percent fewer sick days than those who stuck with hot showers., Daring yourself and encouraging others to take the plunge can be incredibly empowering, and the flood of dopamine and endorphins will leave you energized long after you’ve warmed up.