Paediatrician Dr Jens Christian Holm, who has helped 1,300 overweight and obese children, claims his rules have been so successful they have been adopted by eight districts in Denmark – and that Britain should follow suit.
The rules include no second helpings of food within 20 minutes of eating; snacks and sweets are rationed to once a week; fruit juice or fizzy drinks once a month; and children must walk or cycle to school.
The advice also states that pots are kept in the kitchen at mealtimes - rather than on the table to avoid the temptation of second helpings.
Dr Holm told the BBC he first began testing his set of rules –The Children's Obesity Clinic's Treatment (TCOCT) protocol – in the town of Holbaek, 40 miles from Copenhagen, in 2008.
His plan focuses on sticking to between 15 to 20 rules aimed at improving the diet, boosting exercise levels and slashing time spent sat down.
One states that children must feel satisfied after each meal so they aren't tempted to snack later.
But if they are still hungry after their first helping, they must wait at least 20 minutes for seconds as this is how long it takes for the body to feel 'full'.
Others include no television before 5pm and for no more than two hours a day as well as no white bread for lunch.
Initially they are admitted to hospital for 24 hours where they have tests and scans including measurements of body fat, blood sugar and blood pressure.
They also answer a very detailed questionnaire about their diets and lifestyle, with the help of their parents.
Doctors then help them draw up a more specific set of rules tailored to their likes, dislikes and routines.
These stay in place until the child has reached their target weight.
Dr Holm said that of the 1,900 patients who have been put on the programme since its launch, some 70 per cent have lost significant amounts of weight and kept it off for at least four years.
He said: "In general, obese children are neglected. They are often lonely and many of them don't participate in activities with their peers. They lack self-confidence.
"With this scheme there is a real hope they can lose weight and have a good quality of life."
DR HOLM'S RULES TO TACKLING OBESITY
1. No crunchy muesli or fruit yoghurts for breakfast - choosing oatmeal, dark brown bread, meat and fish instead
2. No fast food or white bread for lunch; choose brown bread, meat, fish and vegetables instead
3. Portions served up in the kitchen - no pots and pans at the dining table
4. Plate proportions for dinner should be: half vegetables, a quarter brown rice, pasta or potatoes, and a quarter low fat fish or meat
5. Wait 20 minutes before having second helpings - this allows time for the body to feel full
6. Feel satisfied after each meal
7. Only two pieces of fruit per day
8. Fast food only once a month
9. Sweets only once a week
10. Snack only once a week
11. Limit juice, iced tea, cocoa, soda or lemonade to once weekly - only half a litre in total
12. Cycle or walk to school
13. Organised physical activity e.g dancing, handball or gymnastics
14. Free physical activities like walking/biking after school, walking the dog or trampolining
15. Screen time (television, computer or tablet) limited to two hours per day
16. No television/computer access until 5pm
17. Set a regular, early bedtime.
Are most of these rules simple common sense? Tell us what you think...