Nutrition for Injury Recovery: What a Registered Dietitian Can Add to Your Physio Plan

A patient recovering from rotator cuff surgery is following their physiotherapy exercise program. They are attending sessions twice a week. They are doing their home program. Six weeks in, their strength gains are slower than expected and the tissue feels sluggish to the clinician on reassessment.

One question that does not always get asked: what are they eating?

Physiotherapy rebuilds movement capacity. Nutrition provides the biological material the body uses for repair. The two are not separate systems, but they are often treated as if they are.

Why Protein Matters More Than Most Injured Patients Realise

Muscle, tendon, ligament, and bone all require protein to rebuild. The body cannot synthesise new tissue without adequate amino acid availability. This is not a complex or contested point. It is basic physiology.

What is less well understood is how often injured patients fall short of adequate protein intake. Injury tends to reduce appetite. Pain and restricted mobility change eating patterns. The result is that protein intake often drops at exactly the point in recovery when the demand for protein is highest.

The general guidance in the rehabilitation literature for adults in active recovery is 1.6 to 2.0 g of protein per kilogram of body weight per day. For a 70 kg person, that is 112 to 140 g of protein daily. Most people in the general population eat considerably less than that even when healthy and active. An injured person managing pain and reduced activity often eats even less.

A registered dietitian assesses actual intake through a detailed food history and identifies whether the patient is meeting the protein load their recovery requires. Then they build a practical eating plan around that finding. Not a generic "eat more protein" recommendation, but a structured approach that fits the patient's food preferences, schedule, and budget.

Collagen, Tendons, and Timing

Tendons and ligaments are primarily made of collagen, the structural protein that gives connective tissue its strength and elasticity. Collagen synthesis is one of the processes that physiotherapy is trying to stimulate through loading exercises. The nutritional side of that equation has attracted meaningful research attention in recent years.

Vitamin C is required for collagen synthesis. Deficiency impairs the process directly. Most people in BC are not deficient, but intake is worth checking during periods of high repair demand.

More specifically, a research team led by Dr. Keith Baar at UC Davis produced work (cited by the British Journal of Sports Medicine, 2017) suggesting that consuming gelatin or hydrolyzed collagen, combined with vitamin C, approximately 30 to 60 minutes before an exercise session may enhance collagen production in connective tissue during that loading window. The evidence is preliminary and the mechanism is not yet fully established, but it is biologically plausible and the intervention carries minimal risk. A registered dietitian can advise on whether this approach is worth trying for a patient with a tendon or ligament injury.

This is the kind of nuanced recommendation that a supplement label does not give you and a general internet search cannot contextualize for your specific injury and training load.

Omega-3 Fatty Acids and Inflammation

The relationship between omega-3 fatty acids and inflammation is one of the more established areas of nutrition research. EPA and DHA, the active forms found in fatty fish and fish oil, have anti-inflammatory effects that are relevant in two distinct injury scenarios.

For acute injuries (a muscle strain, a ligament sprain, a surgical incision), the initial inflammatory response is necessary. It is part of the healing cascade. Blunting it too aggressively in the first 48 to 72 hours may slow repair. Most dietitians in a clinical setting would not push high-dose omega-3 supplementation in the acute phase for this reason.

For chronic tendinopathy (Achilles, patellar, rotator cuff, lateral elbow), the inflammatory picture is different. The tissue shows a more diffuse, low-grade process rather than an acute response. Here, the evidence for omega-3 supplementation as a supportive intervention is more favourable, though not definitive. A dietitian can advise whether it makes sense to add it to the overall plan and, if so, at what dose.

Vitamin D and Bone Healing

BC has unusually high rates of vitamin D insufficiency during the winter months. From roughly October through April, the angle of sunlight at this latitude is insufficient to trigger meaningful vitamin D production through the skin. People who work indoors year-round may be insufficient year-round.

Vitamin D is directly involved in calcium absorption and bone metabolism. For patients recovering from fracture, stress fracture, or a bone injury related to osteoporosis, vitamin D insufficiency slows healing. It is a correctable problem. The appropriate supplementation threshold varies by the individual's baseline level, which requires a blood test to establish. This is not something a blog post should prescribe, and a dietitian will say the same thing. But identifying whether sufficiency is an issue, and then supporting the correction, is a concrete contribution to a bone healing case.

What Sports Nutrition Actually Means for Rehabilitation Patients

The phrase "sports nutrition" tends to bring to mind elite athletes, supplement stacks, and protein shakes. For a rehabilitation patient, it means something far more practical.

It means eating enough overall. Under-fuelling is common during recovery, particularly when a patient is less active than usual and feels like they should be eating less. The body's repair processes require energy. Restricting calories during active tissue healing slows the work the physiotherapy is trying to do.

It means timing food around sessions. Having adequate protein and carbohydrate available in the hours before and after a physiotherapy session supports the adaptation you are trying to create.

It means avoiding specific deficiencies that impair healing. In a Metro Vancouver population, vitamin D is the most common. Iron deficiency is also worth checking in women of reproductive age, particularly those who are postpartum and returning to activity.

A registered dietitian does not replace the physiotherapist. They close the gap between "follow your exercise program" and "give your body the resources to respond to it."

Registered Dietitian vs Nutritionist in BC

This distinction matters. In BC, the title "registered dietitian" is protected by law. To use it, a person must have completed an accredited university degree in dietetics, a supervised internship, and passed national registration exams. They are regulated by the College of Dietitians of BC, now part of the College of Health and Care Professionals of BC (CHCPBC).

The title "nutritionist" is not protected in BC. Anyone can use it. Some nutritionists have solid training. Others have a weekend certificate. When you are recovering from an injury and making decisions about your eating in a clinical context, working with a registered dietitian gives you a regulated professional whose credentials you can verify.

Coverage in BC

Some extended health plans cover registered dietitian services. Pacific Blue Cross, Sun Life, Manulife, and Green Shield Canada all offer plans that include a dietetics benefit, though the annual maximum and which services qualify vary by plan. Direct billing availability depends on the insurer. Contact the clinic to confirm.

WorkSafeBC active rehabilitation programs sometimes include dietitian services as part of a coordinated return-to-function plan. If you are in an active rehab program and have questions about nutrition support, ask your case coordinator or your physiotherapist at Launch Rehab.

How It Works at Launch Rehab

Our registered dietitian works alongside physiotherapists and kinesiologists across our Metro Vancouver studios. The most common referral pathways are: patients who have stalled in recovery and want to assess whether nutrition is a contributing factor, post-surgical cases (particularly rotator cuff repair, knee replacement, and ACL reconstruction), WorkSafeBC active rehab patients, and patients managing chronic tendinopathy where conservative treatment has been only partially effective.

You can book with our registered dietitian directly at launch.janeapp.com, or ask your physiotherapist at your next session for a warm referral. We have studios in Lougheed, North Burnaby, Coquitlam, Richmond, and New Westminster.

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This post is for general education. It is not a substitute for assessment or advice from a regulated health professional.