Scientists from the University of Iowa believe that if the child if physically active at the age of five, he or she has higher chances of staying slim in the future. Dr. Kathleen Janz, the author of the study, explains that children who are physically active during the pre-school period less often become overweight during school years than those children who are not active. Scientists call it "savings effect", since children receive the "dividends" from their early activities in the future (similar to the way it works with the savings bank accounts). Full story