Gym tonic? Gymbox has replaced its dumb-bells with human weights to encourage people to exercise. Members of Gymbox can choose one of five people ranging from two midgets to a 155kg man. The gym already runs a ‘chav fighting’ self-defence class and ‘WAG workouts’ to make women more attractive to footballers. The human weights, who sit on adapted machines, are said to help gym-goers by letting them visualise what they are lifting. They will also shout words of encouragement if requested. The human weights range from ‘Dainty Diva’ – Arti Shah, 32, who weighs just 30kg (4.7 stone), up to ‘Super Human’ – Matt Barnard, 37, who weighs a massive 155kg (24.4stone). Gymbox owner Richard Hilton said the human weight lifting device was the ‘ultimate embodiment of visualisation theory.’ He added: ‘Creating a mental image or intention of what you want to happen or feel is proven to improve physical and psychological performance. ‘We’re optimistic our members will see better results with our new human weight machine.’