New concepts of PE and sports programs are making it more fun for everyone to play. Diets featuring fast food, sugary soft drinks and declining physical activity have contributed to a tripling of childhood obesity rates in the United States in the last 30 years, according to the U.S. Centers for Disease Control. Today, nearly a third of American kids qualify as overweight or obese. Poor eating habits and sedentary childhoods have also contributed to more kids with asthma, heart problems and a spike in type 2 juvenile diabetes. Some policymakers are looking to schools in general, and physical education in particular, to reverse this national trend. First Lady Michelle Obama has championed the "Let's Move" initiative to raise awareness of childhood obesity while educating kids and communities about the advantages of healthier food and regular exercise. "Let's Move In School" (which is unrelated to Let's Move) is sponsored by the American Alliance for Health, Physical Education, Recreation, and Dance (AAHPERD). The program promotes physical activity throughout the school day by means of education, grants and professional development. Even more than emphasizing the negative consequences of obesity, advocates of PE and sports programs seek to play up positive links between regular physical activity and overall well-being.