Eat to Perform, Repair & Recover: How Nutrition Shapes Injury Risk and Healing - part 1

Why Nutrition is Central to Injury Prevention and Recovery (Not Just Performance)

Injury prevention is often framed around biomechanics, training load, or recovery protocols. While these are essential, they overlook a foundational determinant of tissue resilience and repair capacity: nutrition status and energy availability.

Muscle, tendon, ligament, and bone are metabolically active tissues. They are continuously remodelling in response to training stress. If nutritional inputs are insufficient, the body prioritises survival over adaptation — and the result is increased injury risk, slower healing, and reduced training tolerance.

The injury problem in sport and exercise

Musculoskeletal injuries are highly prevalent in both elite and recreational populations. These commonly include:

• Muscle strains and tears

• Tendinopathies (Achilles, patellar, rotator cuff)

• Ligament sprains (ankle, knee, shoulder)

• Bone stress injuries (stress reactions and fractures)

Beyond the immediate injury, the real issue is what follows:

• Loss of training continuity

• Deconditioning

• Compensatory movement patterns

• Increased re-injury risk

In many cases, the underlying vulnerability is not just mechanical — it is physiological.

Nutrition as a structural input system

Nutrition is not only fuel for performance. It provides the raw materials for tissue integrity:

1. Protein → muscle repair and remodelling

2. Amino acids + vitamin C → collagen synthesis (tendons/ligaments)

3. Calcium + vitamin D → bone mineralisation and remodelling

4. Carbohydrates → training capacity and endocrine support

5. Fats → hormonal regulation and cell membrane integrity

These systems are interdependent. When energy intake is insufficient, the body downregulates repair processes.

The most important concept: energy availability

One of the most important — and most overlooked — drivers of injury risk is Low Energy Availability (LEA).

This occurs when energy intake does not adequately match energy expenditure after accounting for physiological needs.

Consequences include:

• Impaired muscle protein synthesis

• Reduced bone formation

• Hormonal disruption (including sex hormones and thyroid function)

• Impaired immune function

• Reduced collagen synthesis

In sports science, this cluster of effects is often referred to as Relative Energy Deficiency in Sport (RED-S).

Importantly, RED-S is not exclusive to elite athletes. It is increasingly observed in:

• Recreational runners

• Gym-based exercisers

• Individuals dieting while training

• Perimenopausal women combining fat loss with exercise

Why injury risk increases when energy is low

From a tissue perspective:

• Muscle repair slows → microdamage accumulates

• Bone remodelling shifts toward resorption

• Tendon collagen turnover becomes inefficient

• Recovery between sessions is incomplete

This creates a scenario where training stress exceeds repair capacity, even if training itself is well programmed.

Food-first approach

A food-first nutritional strategy remains the foundation for injury prevention and recovery. This means prioritising:

• Adequate total caloric intake

• Sufficient protein across the day

• Nutrient-dense carbohydrate sources for training support

• Dietary fats for hormonal and inflammatory regulation

Supplementation may have a role in specific contexts, but it cannot compensate for chronic under-fuelling.

Key takeaway

Injury risk is not solely a function of load or mechanics. It is also a function of biological capacity to tolerate and repair that load.

When energy availability is sufficient, the body adapts. When it is not, the body protects — and performance and resilience decline.