London School of Diving’s scuba diving instructor Nick Mobley created what he believes is the world’s first ‘underwater turbo training cycle’ for use in a diving pool. The school challenged all divers to see who could cycle a mile underwater. One diver said it was awkward at first, but was a great workout. It was a lot harder than divers anticipated. There were a few interesting buoyancy issues, and divers needed all their skills to stay solidly on the bike.