Interventions to increase adherence to therapeutic exercise in older adults with low back pain and/or hip/knee osteoarthritis: a systematic review and meta-analysis

Objective: To evaluate whether interventions aimed at increasing adherence to therapeutic exercise increase adherence greater than a contextually equivalent control among older adults with chronic low back pain and/or hip/knee osteoarthritis.

Design: A systematic review and meta-analysis.

Data sources: Five databases (MEDLINE (PubMed), CINAHL, SportDISCUS (EBSCO), Embase (Ovid) and Cochrane Library) were searched until 1 August 2016.

Eligibility criteria for selecting studies: Randomised controlled trials that isolated the effects of interventions aiming to improve adherence to therapeutic exercise among adults ≥45 years of age with chronic low back pain and/or hip/knee osteoarthritis were included.

Results: Of 3899 studies identified, nine studies (1045 participants) were eligible. Four studies, evaluating strategies that aimed to increase motivation or using behavioural graded exercise, reported significantly better exercise adherence (d=0.26-1.23). In contrast, behavioural counselling, action coping plans and/or audio/video exercise cues did not improve adherence significantly. Meta-analysis using a random effects model with the two studies evaluating booster sessions with a physiotherapist for people with osteoarthritis revealed a small to medium significant pooled effect in favour of booster sessions (standardised mean difference (SMD) 0.39, 95% CI 0.05 to 0.72, z=2.26, p=0.02, I²=35%).

Conclusions: Meta-analysis provides moderate-quality evidence that booster sessions with a physiotherapist assisted people with hip/knee osteoarthritis to better adhere to therapeutic exercise. Individual high-quality trials supported the use of motivational strategies in people with chronic low back pain and behavioural graded exercise in people with osteoarthritis to improve adherence to exercise.