Does the lack of physical education classes in many public schools contribute to the childhood obesity epidemic?

When I was in public school we had to take gym every day. I had 50 minutes of "physical education" every school day from Kindergarten through Senior year of high school. It turns out that LOTS of schools don't have gym anymore. So, does missing out on this 50-minute "workout" every school day contribute to childhood obesity.

Health, Beauty & Fitness
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