Experts say it may affect their thinking skills.
A new study from the University of Colorado Boulder finds the more time kids spend in structured activity, the less they are able to problem-solve and make decisions on their own.
Experts suggest there is a balance between structured sports and lessons and good old fashioned free time.
In other health news, the National Cancer Institute says extremely obese adults have increased risks of dying prematurely from cancer, heart disease, diabetes and kidney and liver diseases.
About 6% of adults in the U.S. fall into this category which is more than 100 pounds over the recommended range for normal weight.
The researchers say the number of years of life lost for those with extreme obesity is equal to that of current smokers who are at a healthy weight.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.