There are “fitness tips” so wrong that they can make a trainer cringe, so we decided to find out which are the worst offenders. Maurice D. Williams, a NASM and NSCA certified trainer and owner of Move Well Fitness, calls this cringe-worthy advice “gym science,” or un-true information that tends to float around in gym conversations. “Typically speaking, they either have been proven wrong or are not proven at all,” he said. We asked a few trainers to share the worst advice they’ve ever heard. Straight from the gym floor, here’s what they reported.