Barry Sanders is imploring folks to undergo a complete medical checkup, nearly one year after the Hall of Fame running back suffered what he initially labeled as a heart-related health scare.During an exclusive interview with CBS Sports, Sanders disclosed that the “health scare” indeed was a heart attack.”Of all things, I don’t know why, that just never entered my mind,” Sanders said of his heart attack. “I’m learning through this process that there aren’t necessarily any warning signs, unless you do what we’re encouraging people to do, which is to go the doctor, get tested for LDLC levels, or bad cholesterol. That’s the only way to find out if you have high cholesterol. It’s not something you’re going to be able to feel. You don’t have to fit a certain physical profile.”Sanders, 56, shared his experience in “The Making of a Heart Attack,” which will air on Saturday at 1 p.m. ET on A&E.He said he woke up with a burning sensation in his chest while attending a recruiting visit for his son.”I couldn’t believe it, honestly. I thought it was like heartburn, but it just kind of persisted,” Sanders said.