A new systematic review and meta-analysis suggests that diet may play a larger role in injury risk for runners than previously thought. The study, which analyzed data from nearly 6,000 adult distance runners, found that those who consumed fewer calories, less fat, and less fiber were more likely to suffer injuries, including bone stress injuries.
Researchers identified three key dietary factors that set injured runners apart. Female runners who were injured consumed about 300 to 450 fewer calories per day than those who stayed injury-free. Injured women also ate about 20 grams less fat per day on average. Additionally, runners of all genders with lower daily fiber intake, around 3 grams less, had a higher risk of injury.
The findings highlight that cutting calories or fat, even for body composition goals, comes with tradeoffs. Calories are needed for muscle repair and hormone production. When the body is underfueled, it may reduce functions like bone remodeling or reproductive hormone output. Fat is needed to absorb vitamins like D and K, produce sex hormones, and regulate inflammation. Without enough fat, bones, muscles, and connective tissues may not get the support they need for recovery.
The study also points to a connection between gut health and musculoskeletal health. Fiber-rich diets support a healthy gut microbiome, which may help with injury prevention and healing. This is especially relevant for endurance athletes under constant physical stress.
For runners and anyone increasing their workout intensity, the study reinforces that nutritional needs rise with activity levels. As training increases, so should calorie, fat, and fiber intake. The difference in intake between injured and uninjured runners was small. A few hundred extra calories, an extra tablespoon of olive oil, or a serving of berries and beans may be enough to improve recovery and reduce injury risk.
To support injury-resistant training, the study suggests focusing on balanced meals with whole foods and healthy fats. Examples include adding avocado or nut butter to post-run smoothies, snacking on trail mix with almonds and walnuts, cooking vegetables in olive oil, adding beans or lentils to salads, and choosing whole grains like oats and quinoa.
The research indicates that nutrition is not just fuel but a foundation that helps protect the body from injury. Whether a person is a seasoned athlete or just starting to move more regularly, eating enough to support activity is important. Good nutrition is part of the plan for staying strong and injury-free.
