Simple yet revolutionary: The secret to weight reduction, fitness, and well-being lies in a often underestimated function of our body - breathing. Without realizing it, we often breathe too much, which can lead to health problems, insomnia, and obesity. Breathing exercises can help here, as controlled breathing supplies muscles and organs with just the right amount of oxygen. Patrick McKeown has trained over 5,000 individuals, including professional athletes and Olympic participants, in proper breathing techniques. In his book "Success Factor Oxygen," he now shares his scientifically proven breathing techniques. After an introduction to the relationship between oxygen and the body, the Body Oxygen Level Test determines how efficiently the body uses oxygen. Those looking to enhance their performance can improve this value through simple breathing exercises.