A recently marketed training principle, the "Lundberg" cure was postulated to cause an extraordinary weight loss when practised for only seven minutes per day. One hour of intensive training should lead to an additional energy expenditure of approx. 500 kcal. If the "Lundberg" cure was intensive, the treatment would mean a weight loss of approx. 240 g/mo. By testing the principle using respiratory chambers, it was shown that the metabolism was unchanged after the training period and that the additional energy expenditure during training averaged 0.94 kJ/kg lean body mass (SEM 0.07) corresponding to 63 g fat tissue/month or half a slice of white bread a day. It is concluded that the "Lundberg" cure, if practised as described in the press, will not lead to any weight loss, apart from that expected from the physical activity.