Three twins of slightly overweight build, 5'11" 200 pounds say
Twin 1 follows Paleo diet for six months,
Eating between 2500-3000 calories of fish, turkey, chicken, salad, and some fruit (no bread at all).
Twin 2 counts calories, eating 1000-1500 calories a day from varying sources (pasta, burgers, etc)
Twin 3 ...
Etc.
What would the physiques look like after 6 months.
And say they don't work out beyond walking 3 miles a day.