Dr David Haslam, of the National Obesity Forum, questioned whether it was realistic to expect people to do two weight training sessions each week.

BBC: NEWS | Health | Exercise 'must be tough to work'

Dr David Haslam, clinical director of the National Obesity Forum, said he welcomed any scheme to tackle obesity but questioned whether it was targeting young enough children.

BBC: 2,000 obese children offered help

Dr David Haslam, chairman of the National Obesity Forum, said cutting calorie intake by 800 in this way should be easy to sustain and was enough to shed unwanted weight.

BBC: NEWS | Health | Cutting down calories 'is easy'

Dr David Haslam, of the National Obesity Forum, said the finding cast new doubt on the merits of Body Mass Index (BMI) as a way to assess whether somebody was unhealthily overweight, as it did not differentiate between different types of fat.

BBC: Type of body fat 'boosts health'