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Not only helped one man rethink his life choices, it may have saved his life. >> my cholesterol level was extremely high. they said if i dont start dieting or exercising correctly, that i could die within five years. >> he took the message to heart. lost weight, got in shape. now he has a new goal. well bring it to you. youre live in the "cnn newsroom." audi pilotless vehicles have conquered highways, mountains, and racetracks.

>> thats where i woke up and realized that selling drugs is wrong. >> reporter: during a routine prison physical, marte got a second wakeup call. >> my cholesterol level was extremely high. if i dont start dieting or exercising correctly, i could die within five years. >> reporter: coss developed a workout inside his cell. he lost weight and gained purpose. >> i actually helped 20 guys lose over 1,000 pounds. >> reporter: once out of prison, coss connected with ventures, getting loans to ex-cons...

He was caught and spent four years in prison. >> that is what woke me up. i realized that selling drugs was wrong. >> during a routine prison physical, he got a second wake up call. >> my cholesterol level was extremely high. they said if i dont start dieting or exercising correctly that i could die within five years. >> cause developed a full body workout right inside his cell. >> i lost 70 pounds in six months. >> lost weight and gained purpose. >> actually helped 20 guys lose over a thousand ...