BATON ROUGE (AP) — A new report card gives Louisiana a ‘‘D’’ in children’s health, saying too many kids are overweight and too few get enough physical activity, spending more time parked in front of a TV set than children in other states.

In fact, Louisiana has the highest percentage of high school students with TVs in their bedrooms in the nation, and studies show children with bedroom TVs are more likely to be overweight, said Peter Katzmarzyk, with LSU’s Pennington Biomedical Research Center, which released the report card Monday.

Louisiana received the same grade as it did a year earlier, when the annual report card was started by Pennington, which does extensive research in obesity and public health.

‘‘We hope that this report card really becomes an advocacy tool,’’ said Katzmarzyk, the research center’s associate executive director for population science.

Pennington doesn’t do a state-by-state report card, but grades Louisiana on 14 indicators from fruit and vegetable consumption to sports participation.

Among the statistics included in the report card:

—36 percent of Louisiana children ages 10 to 17 are overweight or obese.

—57 percent of high school students in Louisiana watched TV for two or more hours per day in 2008. More than 70 percent of children in Louisiana have a TV in their bedrooms.

—Nearly 18 percent of Louisiana high school students smoke.

—Fewer than half of high schoolers attend physical education classes five days per week.

The Pennington report card suggests that parents, teachers and policy-makers should encourage more physical activities among children. It also recommends creating tax breaks for parents whose children participate in sports programs and other physical activities.