My answer is get obese people on treadmills, that generate electricity for old people homes. Dangle a few Mars bars or few cans of pissy drinks on a fishing line in front of the lardies.
I have lots of fishing line.
After they lost some weight, Wyot in his booty shorts and muscle fit tank top. Can take the lardies out on a power walk across Surrey, once they enter London they can sprint.