How Cristiano Ronaldo of Portugal was able to reduce his heart rate to 100 bpm as he prepared to take the first shot in a penalty shootout in Euro Cup soccer against Slovenia. It was 170 bpm at the end of extra time. This was after he missed a penalty shot during the game. Ronaldo uses breathing in and breathing out as a way to control his heart rate. Visualization is another technique he uses to be in the best state of mind. Along with hydration, healthy diet and good sleep patterns breathing exercise is a way to reduce the heart rate in moments of stress. Why is it effective? Ronaldo says "It's because it makes you calm." The tracking was recorded by a fitness device called WHOOPS. This breathing in and breathing out is part of the Buddhist practice and an ancient way of maintaining the four forms of mindfulness involving contemplation of the body, of feeling, of mind, and of mind object.