Prehabilitation: The Investment Before Surgery That Pays the Greatest Dividends

The concept that a patient's pre-operative condition is one of the strongest predictors of their post-operative outcome is not new. What is relatively new is the systematic approach to improving that condition in the weeks and months before surgery — not simply identifying risk factors and documenting them, but actively addressing them through structured intervention. Prehabilitation treats the pre-operative period as an active phase of treatment rather than a waiting room.

What the evidence supports

The evidence base for prehabilitation is most robust in major joint replacement and complex abdominal surgery, but the principles apply across elective orthopaedic procedures. Patients who participate in structured pre-operative exercise programmes demonstrate faster functional recovery, shorter hospital stays, lower post-operative complication rates, and better patient-reported outcomes at 3 and 6 months compared to those who do not — even when the difference in pre-operative functional level is modest. The biological mechanisms are well-characterised: improved cardiovascular reserve, better muscle mass and strength, enhanced neuromuscular activation patterns, and reduced systemic inflammatory burden all contribute to resilience during and after the surgical stress response.

For shoulder arthroplasty specifically, pre-operative restoration of range of motion — even partial — is associated with better post-operative range of motion outcomes. Scapular stabiliser strength and rotator cuff activation before surgery create the muscular foundation on which post-operative rehabilitation builds. The patient who arrives on the day of surgery with a well-activated cuff, reasonable motion, and realistic understanding of the recovery process is in a fundamentally better position than one who has not had this preparation — regardless of the surgeon's technical excellence.

Optimising beyond the musculoskeletal

Prehabilitation in its fullest form extends beyond exercise. Nutritional status — particularly protein intake and vitamin D levels — directly affects tissue healing and immune function. Smoking cessation before surgery significantly improves wound healing, reduces infection risk, and, in cuff repair, directly improves tendon-to-bone healing rates. Glycaemic optimisation in diabetic patients reduces surgical site infection rates and improves nerve and tissue healing. Anaemia correction before elective surgery reduces transfusion requirements and fatigue during recovery.

The practical challenge is access: structured prehabilitation requires physiotherapy time, patient motivation, and sufficient lead time before surgery. Building prehabilitation into the surgical pathway — making it an expected component of elective surgery preparation rather than an optional extra — requires departmental commitment and, in many systems, advocacy for the resources that make it possible. The return on that investment, in outcomes and in reduced post-operative resource use, is compelling.