America's laziest teens: Which state is worst?

lazy, teen, boy, music, headphones, exercise, stock, 4x3 — istockphoto

Obesity is a big, fat problem for teens - and a growing one. Obesity rates among U.S. teens have more than tripled in the past 30 years, rising from 5.0 percent to 18.1 percent.

What's going wrong? Bad eating habits are no doubt to blame, but so is a lack of exercise - and some states have more couch potato kids than others. Keep clicking to see the rankings...

The rankings - based on recent surveys supervised by the Centers for Disease Control and Prevention - aren't perfect. But they're certainly provocative, especially to parents eager to get their kids up off the couch.

25. New Hampshire

In New Hampshire, only 24.0 percent of children in grades nine through 12 said they were physically active.

24. Indiana

Indiana, state, 4x3, generic — istockphoto

In Indiana, 23.5 percent of children in grades nine through 12 said they were physically active.

23. Idaho

In Idaho, 23.2 percent of children in grades nine through 12 said they were physically active.

22. Florida

florida, state, generic, orange, 4x3 — istockphoto

In Florida, 23.0 percent of children in grades nine through 12 said they were physically active.

21. Delaware

Delaware, state, 4x3, generic — istockphoto

In Delaware, 22.8 percent of children in grades nine through 12 said they were physically active.

19. (tie) South Dakota

In South Dakota, 22.6 percent of children in grades nine through 12 said they were physically active.

19. (tie) Nevada

In Nevada, 22.6 percent of children in grades nine through 12 said they were physically active.

17. (tie) Maine

Maine, state, 4x3, generic — istockphoto

In Maine, 22.1 percent of children in grades nine through 12 said they were physically active.

17. (tie) New Mexico

In New Mexico, 22.1 percent of children in grades nine through 12 said they were physically active.

16. Michigan

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In Michigan, 21.9 percent of children in grades nine through 12 said they were physically active.

15. North Dakota

In North Dakota, 21.8 percent of children in grades nine through 12 said they were physically active.

14. Illinois

In Illinois, 21.7 percent of children in grades nine through 12 said they were physically active.

12. (tie) Massachusetts

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In Massachusetts, 21.5 percent of children in grades nine through 12 said they were physically active.

12. (tie) Mississippi

Stone Arch bridge over Mississippi in Minneapolis. — istockphoto

In Mississippi, 21.5 percent of children in grades nine through 12 said they were physically active.

11. Montana

In Montana, 21.2 percent of children in grades nine through 12 said they were physically active.

10. New York

In New York, 20.6 percent of children in grades nine through 12 said they were physically active.

9. South Carolina

south carolina, istockphoto, 4x3 — istockphoto

In South Carolina, 20.1 percent of children in grades nine through 12 said they were physically active.

8. Utah

In Utah, 19.9 percent of children in grades nine through 12 said they were physically active.

7. Wisconsin

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In Wisconsin, 18.8 percent of children in grades nine through 12 said they were physically active.

6. Alaska

In Alaska, 18.7 percent of children in grades nine through 12 said they were physically active.

5. District of Columbia

washington d.c., washington dc, capitol building, spring, generic, 4x3 — istockphoto

In the District of Columbia, 18.5 percent of children in grades nine through 12 said they were physically active.

4. Hawaii

hawaii, state map, generic, 4x3 — istockphoto

In Hawaii, 18.1 percent of children in grades nine through 12 said they were physically active.

3. Kentucky

In Kentucky, 17.6 percent of children in grades nine through 12 said they were physically active.

2. Maryland

maryland, state sign, generic, 4x3 — istockphoto

In Maryland, 16.3 percent of children in grades nine through 12 said they were physically active.

1. Arizona

In Arizona, 16.2 percent of children in grades nine through 12 said they were physically active.