Researchers found that kids who have higher BMIs tend to do a little worse on treadmill tests than thinner kids…if they’re from “lower- or middle-income neighborhoods.” The difference goes away if they’re from the more affluent neighborhoods.
Lead researcher Dr. Tajinder P. Singh, of Children’s Hospital Boston, speculates that
[K]ids from affluent neighborhoods have healthier lifestyles — better diets, more opportunities for exercise — so that even if they are overweight, they may be in good health.
Singh also points out that BMI just measures height and weight, and so it could be the more affluent kids have more muscle mass. I recall that muscle mass can depend on genetics, but it’s also greatly influenced by exercise. Ah!
So, logically speaking, does Singh then suggest that perhaps lower- to middle-income children could benefit from more opportunities to exercise?
Singh said they suggest that lower- to middle-income children stand to gain the most from losing excess weight.
Even though they’re doing treadmill fitness tests, which are … exercise.
Measuring response to … exercise.
A response that improves with … exercise.
Gee. If ALL the kids from poorer neighborhoods had averaged lesser cardio fitness, would he have suggested they should move to the better neighborhood?