Yes and moreover we have statements such as " it’s harder for adults today to maintain the same weight as those 20 to 30 years ago did, even at the same levels

Yes and moreover we have statements such as " it’s harder for adults today to maintain the same weight as those 20 to 30 years ago did, even at the same levels of food intake and exercise." and "In other words, people today are about 10 percent heavier than people were in the 1980s, even if they follow the exact same diet and exercise plans." These conclusions from a study with 36,000 people out of some 300 million Americans?