Can you keep a calm face and in the moment during a hard workout or movement? The more strain you put on your face actually makes workouts harder. Keeping a calm and relaxed face helps keep your heart rate down and doesn't send the panic signals to your CNS. Try it out next time during a tough workout, stay calm and relaxed, but still move fast....
As many rounds as possible in 10 minutes
1 Arm hang kettlebell snatch (each arm) (53#/35#)
30 Double under after each round