Ok, but that brings us full circle doesn’t it? Your initial assertion was that the difference between the 2 pigs was purely due to what they eat. Now you’re saying that the amount of exercise is the main factor? If you remember my initial response was that their diet is not the only thing responsible for the difference. If you had a comparison of pigs of the same breed who had the same amount of exercise but were fed different diets and you had a similar result to your initial picture that would be an honest comparison. Likewise comparing the Samoan guy from 150 years ago with someone from today is not an honest comparison because there are so many uncontrolled variables. The reasons for the differences are multifaceted and nuanced.