While diagnostic precision is important, prevention must not be delayed, particularly in middle-aged adults, where early intervention can prevent muscle loss. Midlife is a key period for musculoskeletal health, with declines in neuromuscular efficiency (9), physical activity (10), hormonal alterations (e.g., oestrogen) (11), and poor dietary habits accelerating muscle loss (12, 13). Gender-specific barriers also influence the risk of sarcopenia, particularly in women during the perimenopausal phase (14, 15). Developing inclusive, accessible resistance training (RT) programmes tailored to women's needs – addressing social, cultural, and practical barriers – could improve long-term engagement.

A summary of the key intervention strategies and modifying factors for the prevention of sarcopenia in midlife is presented in Figure 1. This Research Topic explored key lifestyle approaches, including nutrition, exercise, and gut-muscle interactions, offering solutions for sustaining musculoskeletal health through early, targeted intervention.

Diet is fundamental to muscle health, but modern dietary patterns are increasingly dominated by UPFs, which may accelerate muscle loss. Kong et al. investigated the association between ultra-processed food (UPF) consumption and muscle health, revealing that higher UPF intake was significantly associated with low muscle mass in young to middle-aged adults. These findings reinforce the need to prioritise whole, nutrient-dense foods to reduce early muscle deterioration.

However, not all UPFs are inherently harmful. High-protein products, such as protein shakes and bars, fall into the UPF category but can support protein intake when consumed as part of a balanced diet. Alternatives, such as high-protein yoghurts containing probiotics, may also promote gut health. Future research should assess diet quality holistically, considering both benefits and risks when evaluating UPFs in muscle health strategies.

While protein remains crucial, diet alone is insufficient without exercise. Research shows that muscle protein synthesis declines with age, necessitating higher protein intake thresholds to stimulate an adequate anabolic response. Reviews highlight protein quality, timing, and distribution as key factors in maximising muscle preservation (19, 20).

Schalla et al. found that high-protein diets had minimal impact on muscle mass and strength in physically active middle-aged adults, reinforcing the need for an integrated approach combining diet and RT. This highlights a gap in current nutritional recommendations, where protein supplementation is often prioritised over exercise (i.e., RT), limiting its efficacy in the prevention of sarcopenia.

Of all interventions, exercise (i.e., RT) remains the most effective strategy for preventing muscle loss and function. Li et al. conducted a network meta-analysis that identified RT as the most effective approach to counteracting sarcopenia, particularly in clinical populations.

Despite strong evidence supporting RT, participation remains low, with global participation rates of 18%–35% in men and 14%–26% in women (14). Common barriers, especially among midlife women, include perceived time constraints, lack of knowledge and education, exercise modality preferences, and social factors (15). Addressing these barriers through education, community-based programmes, and gender-inclusive training environments is crucial to improving adherence and maximising public health benefits.

Despite the growing recognition of sarcopenia as a midlife health concern, prevention efforts remain fragmented. This collection highlights the urgent need for integrated, proactive strategies targeting modifiable lifestyle factors – diet, resistance exercise, and gut health – before significant muscle loss occurs.

Public health initiatives must prioritise early intervention with a coordinated effort to educate healthcare professionals, policymakers, and the public on the importance of exercise and nutrition for muscle health. While resistance exercise remains the most effective intervention, complementary nutritional strategies should focus on reducing UPF consumption, promoting gut health, and ensuring adequate, high-quality protein intake to maintain muscle.

Policymakers and healthcare systems must invest in accessible, evidence-based interventions tailored to midlife adults, embedding sarcopenia prevention within public health frameworks. Future research should enhance the accessibility, adherence, and long-term sustainability of interventions, making sarcopenia prevention a midlife priority rather than an afterthought.