Faced with a host of lifestyle diseases like obesity, diabetes and blood pressure, people as young as teenagers are turning to fitness centres, says author Rujuta Diwekar, whose new book demystifies exercise. "Exercise is the in thing - gyms are cropping up in every nook and corner, roads are occupied by recreational runners and yoga schools have an enviable waiting list. But along this has grown the number of injuries and disillusionment at not getting results," says Diwekar. Trainer and nutritionist Diwekar trains celebrities like Kareena Kapoor, Preity Zinta and Anil Ambani. In her book "Don't Lose Out, Work Out" she talks about various myths and malpractices about exercise.