I'm very fortunate in not being overweight and started C25K for fitness reasons, not for weight loss. I've worked through the 9 weeks to graduation and haven't made any significant changes to eating habits. I'm sure my waist and legs are slimmer but ...... I weighed myself yesterday morning (on the wii fit) for the first time since starting the programme and discovered I was 2.5 kilos HEAVIER than I was when starting the programme. And I checked again on the bathroom scales this morning and they tell the same story. Just wondering - any truth in that old wives' tale about muscle being heavier than fat???!!