Weiss 3Long ago, fitness was a natural part of everyday life, but as humanity evolved, fitness Physical fitness has become less important in daily life and more necessary in dance training. . According to Physical Activity and Health: A Report of the Surgeon General, “our ancestors…integrated strenuous activity as part of their daily lives – and not just for the daily subsistence needs of their ‘work lives’” (“Physical Activity and health"). Fitness was the result of daily living rather than the result of commitment. However, as time passed and people became more sedentary, there was less physical activity in daily life. The combination of this lifestyle and the increasing expectations placed on dancers led to increased physical pressure. Ed Yong describes how "over the years, successive generations of ballet dancers have subtly tinkered with ostensibly fixed positions limited by the physical constraints of the dancer's body." “In recent times, dance has become much more physically demanding” (Yong, Ed “Ballet postures have become more extreme over time”).