Pre-surgery exercise and post-operative physical function of people undergoing knee replacement surgery

The objective of this study was to summarize the evidence regarding the effectiveness and dose-response characteristics of pre-operative exercise programmes on post-operative physical function following total knee arthroplasty, through a systematic review.

Twelve candidate studies were identified, but only 3 papers satisfied all inclusion criteria: 2 studies evaluated the effect of resistance training and 1 trial investigated proprioceptive training. The latter study elicited significantly enhanced post-operative gains in function for indices of standing balance (overall stability index: Hedges’ g = -1; anteroposterior stability index: Hedges’ g = -1.15; 6 weeks post-surgery). Results of meta-analysis based on the findings of 2 studies showed that, compared with controls, prehabilitative exercise involving resistance training offered no additional gains in isometric quadriceps muscle strength at 6 and 12 weeks post-operatively.

Despite a potential for efficacy of exercise-based conditioning, this review highlights the scarcity of robust dose-response evidence to guide the formulation of total knee arthroplasty prehabilitation effectively.

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