Encouraging physical activity is a key aspect of public health, with links to significant health benefits, including reducing the risk of a range of diseases, e.g. coronary heart disease, stroke, type 2 diabetes, and helping to maintain a healthy weight 1,2. The UK Chief Medical Officers' (CMOs) guidelines for physical activity present evidence-based, age-specific recommendation for physical activity to improve public health 3. Alongside recommendations for aerobic physical activity (150 minutes per week of at least moderate intensity physical activity, or 75 minutes per week of vigorous intensity physical activity) are specific recommendations for enhancing strength and balance (Table 1): Mainstream planning and delivery on physical activity typically focusses on the general physical activity guideline, with the strength and balance aspect largely considered for specific populations and outcomes, such as programmes aimed at older adults, or programmes aiming to prevent falls. It is unclear whether this lack of focus on the strength and balance aspect of the recommendations is driven by a professional bias (e.g. if the public health community was uncertain of the importance of the recommendations or unsure how to implement them) or barriers to implementation faced by older adults themselves 4. This review therefore Abstract Objectives: This review sought to investigate the question: what are the key barriers to, and enablers for, older adults undertaking muscle strengthening and balance activities, and how can these be addressed by individuals and practitioners? Methods: A search of PubMed for review-level evidence on professional and personal barriers and motivators for strength and balance activities among older people. Results: The search and expert consultation found 46 studies; after screening, twelve papers were included. Many of the barriers and motivators to strength and balance activities are familiar ones that can also apply to physical activity more generally, such as not having the time. More specific barriers to strength and balance activities for older people were perceived risk of a heart attack, stroke, or death, and fear of looking too muscular; with motivators being improved ability to complete daily activities, preventing deterioration and disability, and decreasing the risk or fear of falling. Conclusions: This review of reviews has found a small but consistent body of literature describing the motivators and barriers to older adults taking part in strength and balance activities. This may be used as the basis for planning and delivering physical activity programmes for older adults.