How Teens' Activity Levels Link to Food Choices and Health

Researchers used data from the 2019 National School Health Survey to see how movement habits relate to diet, lifestyle, and how teens view their own health and body. They wanted to find links between how much teens move and what they eat or do.

The study grouped physical activity done in different settings and screen time into separate behavior patterns. Then they ran Poisson regression analyses, adjusting for sex, age, race, skin color, and mother’s education. Significance was set at p < 0.05 with 95% confidence intervals reported.

Teens who were inactive and had little screen time showed lower rates of junk food, healthy food, buying at the canteen, drinking alcohol, and smoking. Their risk ratios were around 0.96 to 0.92. But they were more likely to eat while watching a screen, with a risk ratio of 1.11.

No matter how much they moved, more screen time was tied to poorer food choices, less healthy habits, and worse self‑perceived health. The link between sedentary habits and health outcomes stayed strong across all activity groups.