Exercise has also been shown to increase health and life span and lower the incidence of several diseases (relative to sedentary and obese controls, but not to energy-restricted sedentary controls of matching body weight).[119] Calorie restriction comes into conflict with the high caloric needs of athletes, and may not provide them sufficient energy levels or amino acids for repair, although this is not a criticism of CR per se, since it is certainly possible to be an unhealthy athlete or an athlete destined to die at a young age due to poor diet, stresses, etc. Moreover, in experiments comparing CR to exercise, CR animals lived much longer than exercised animals.[120]
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