By Michael J. Critelli | MakeUsWell Newsletter, 

The overlooked connections between nutrition, sports injuries, and musculoskeletal health

Earlier this week I accompanied my wife to the Stamford, CT office of the Hospital for Special Surgery, one of the world's best orthopedic surgical and rehab facilities. She was there for an x-ray.

When we think about nutrition and orthopedic health, we typically focus on obesity. Excess weight stresses knees, hips, and ankles, so losing weight is often recommended to prevent injury or relieve pain.

But what if some of the most important connections between nutrition and orthopedic injuries have little to do with body weight? Are we treating some orthopedic problems as purely mechanical failures while overlooking their nutritional and metabolic contributors?

Beyond the Mechanics of Injury

Consider the runner with repeated stress fractures. We might investigate footwear, running surfaces, training intensity, and biomechanics. All matter. But inadequate energy intake may also be a factor.

Some athletes burn far more energy than they consume while appearing perfectly healthy. This can produce Relative Energy Deficiency in Sport (REDs), which disrupts hormonal function, bone remodeling, and tissue recovery. A normal body weight can conceal it. Inadequate calcium and vitamin D deficiency can also compromise bone health and raise vulnerability to stress injuries.

When Tendons Reveal Metabolic Problems

Tendon disorders such as Achilles tendinopathy and rotator cuff injuries are usually attributed to repetitive loading, aging, and movement mechanics. But tendons are living tissues that constantly remodel, and their integrity depends partly on collagen synthesis, protein availability, and metabolic health.

Vitamin C is essential for collagen formation. Protein supplies the amino acids for repair. Chronically elevated blood glucose can alter collagen properties and may impair tendon function and healing. Diabetes, for example, is associated with increased risk of frozen shoulder and rotator cuff disease.

This does not mean that eating more protein or taking collagen supplements will prevent a tendon tear. The evidence for specific interventions remains incomplete. It does suggest that persistent orthopedic problems warrant questions about nutritional adequacy and metabolic health alongside conventional physical therapy.

Could Nutrition Influence Athletic Coordination?

ACL tears are commonly attributed to landing mechanics, rapid changes of direction, inadequate strength, or neuromuscular control. But what about an athlete fatigued by insufficient fueling? Carbohydrate availability affects endurance and the ability to sustain high-intensity effort, and fatigue can degrade movement control.

We should not claim that carbohydrate consumption prevents ACL tears. That has not been established. But nutrition may influence injury risk indirectly by affecting the quality of performance under stress.

The Hidden Nutritional Causes of Falls

The implications extend well beyond sports. When older adults fall, we focus on balance, weakness, vision, medications, and environmental hazards. But vitamin B12 deficiency can damage peripheral nerves and impair position sense, and inadequate protein and calories can worsen muscle loss and reduce stability.

The nutritional problem may contribute to the fall that causes the injury, not to the injury itself. That distinction matters: preventing a fracture may require understanding why someone fell, not simply improving bone density.

Nutrition and Recovery After Surgery

Recovery is another overlooked opportunity. A knee or hip replacement patient may become less active and eat less, yet healing and rehabilitation still demand energy and protein. Inadequate intake makes it harder to preserve strength precisely when strength is essential. Nutritional screening and individualized support could complement surgical care and physical therapy.

A Different Approach to Prevention

These examples suggest an opportunity to broaden how we understand orthopedic health. Instead of asking only what mechanical forces caused an injury, we should ask whether the tissues were adequately nourished, whether metabolic conditions impaired their resilience, and whether nutrition affected balance, fatigue, or recovery.

Artificial intelligence and emerging food intelligence tools may eventually help people investigate their own eating patterns and recognize when professional nutritional or medical evaluation is appropriate.

The goal is not to blame every injury on diet or to substitute nutrition for proven orthopedic treatment. Many injuries are overwhelmingly mechanical, and some proposed connections remain scientifically uncertain.

Discussing nutrition as a source of, or contributor to, an injury should be a routine part of an orthopedic consultation. If the physician does not explore whether nutritional deficiencies are contributing, the patient should raise the question.

The opportunity is to integrate different sources of evidence rather than let professional specialties define the boundaries of the problem. Perhaps the most important question is not "What caused this injury?" but "What made this person vulnerable to it, and what might reduce that vulnerability next time?"