Fiber and Physical Activity Poverty
Updated: Aug 5, 2021
Many regions of wealthy countries show a huge difference in nutrition, physical activity quality. This difference shows up in the longevity of populations living a few miles apart. The data on fiber consumption is more or less missing, but we can use proxies such as fruit and vegetable consumption to approximate the scale of the problem. Let me pick California as an example.
It is a rich state that produces around 25% of US vegetables, but only 12.3% of its people meet the daily recommendation for vegetable consumption and 23.9% got less that one portion of vegetables per day in 2019 (source: Centers for Disease Control and Prevention).
In terms of physical activity 22.4% of Californians engaged in no leisure physical activity in 2019 up from 19.1% in 2011. And California is one of the better places when compared to Louisiana, Oklahoma or Maine, which are at over 30%!)
These overall numbers however hide the more dramatic differences within the state where (roughly speaking) the coast and the valley look like two different countries. The difference in longevity is around 10 years, the difference in obesity is 37%.
While root causes are complex and numerous (e.g., education, poverty, access to healthcare, crime, drug use) their impact on nutrition and physical activity can be readily seen.
12.3% meeting California’s vegetable recommendation doesn’t justify treating produce as a fiber proxy. Beans, lentils, whole grains and nuts carry most fiber in many diets, so that gap can overstate the problem and misdirect policy. For messy county-level data, some of the better AI tools for joining CDC and local surveys can help, but the proxy still needs validation.
I started logging my own veggie portions after seeing that California’s 23.9% got less than one serving a day, then added a daily walk because the coast-valley 10-year longevity gap felt less abstract. I also set up a weekly sheet using a fiber and physical activity worksheet to track servings and no-leisure days. Louisiana, Oklahoma, and Maine’s over-30% inactivity now reads as a warning, not an outlier.