Doctor reveals 4 hidden health risks of spending too much time indoors

Nearly half of Americans spend less than two hours outdoors in an entire week, according to a new national survey from the Nature & Health Alliance involving researchers at Texas A&M University.

Dr. John La Puma, a California physician and expert in nature-based medicine, has focused on the potential health impacts of spending less time outdoors.

In his book, "Indoor Epidemic," he discusses how humans spend about 93% of their lives inside, which comes with a "hidden health...