Diet + exercise cuts depression
A new report summarized by Seoul Economic Daily found combining a healthy diet with regular physical activity reduced depression risk by about 45%, and that the combined approach outperformed diet or exercise alone. (en.sedaily.com) The piece frames the finding as evidence that pairing nutrition and movement produces larger mental‑health benefits than single interventions. (en.sedaily.com)
Depression is a common mental disorder, and a March 2026 study in *Nutrients* found Korean adults with both better diets and more physical activity had markedly lower odds of depressive symptoms. (mdpi.com) The study analyzed 17,737 adults age 20 and older from the Korea National Health and Nutrition Examination Survey, using data collected in 2014, 2016, 2018, and 2020. Researchers measured diet with the Korean Healthy Eating Index and defined depressive symptoms as a Patient Health Questionnaire-9 score of 10 or higher. (mdpi.com) Compared with people in the low-diet-quality and low-activity group, the high-diet-quality and high-activity group had an adjusted odds ratio of 0.55 for depressive symptoms, which translates to about 45 percent lower odds. Overall, 4.6 percent of participants met the study’s threshold for depressive symptoms. (mdpi.com) The same paper found the combined pattern looked stronger than either habit on its own, which is the point Seoul Economic Daily highlighted in its April 11, 2026 report. In the sex-stratified analysis, the association was statistically significant among women, with an adjusted odds ratio of 0.48. (en.sedaily.com) (mdpi.com) That fits with a broader body of evidence showing exercise can ease depression symptoms, though the best-supported evidence has come from treatment studies rather than prevention studies. A 2024 *BMJ* network meta-analysis pooled 218 randomized trials with 14,170 participants and found walking or jogging, yoga, strength training, mixed aerobic exercise, and tai chi or qigong all reduced depression compared with active controls. (bmj.com) Evidence on diet has been less settled than evidence on exercise, with recent reviews describing beneficial signals but uneven certainty across studies and populations. That makes joint analyses like the Korean study notable because they test how everyday habits work together instead of one at a time. (sciencedirect.com) (mdpi.com) The study does not show that food and exercise alone prevent depression, because it was cross-sectional and captured people at one point in time rather than following them forward. It also relied on survey-based measures of eating and activity, which can miss or misstate daily habits. (mdpi.com) Depression remains widespread: the World Health Organization says an estimated 4 percent of the global population experiences it, including 5.7 percent of adults. The Korean findings add to evidence that mental health is tied not just to treatment in clinics, but also to how people eat and move day to day. (who.int)
