Aerobic Exercise Improves Frailty and Functional Health in Older Adults: Clinical Nutrition | August 2026

Introduction:

Frailty is a major geriatric syndrome associated with falls, disability, hospitalisation, and reduced quality of life. Although aerobic exercise is widely recommended, the optimal type and dose for improving frailty and overall health remain uncertain. This systematic review and dose-response meta-analysis evaluated the effectiveness of aerobic exercise and explored whether increasing exercise volume provides additional benefits in frail and pre-frail older adults.

Why was this study needed?

Frailty affects a growing proportion of the ageing population worldwide.

Aerobic exercise is recommended, but the optimal exercise dose has not been clearly established.

Different exercise modalities and intensities have shown inconsistent results across studies.

Clinicians need evidence-based guidance to prescribe safe and effective exercise programs for older adults.

Understanding the dose-response relationship can help maximize benefits while maintaining adherence.

Results:

This meta-analysis included 44 randomized controlled trials involving 4,011 frail or pre-frail adults aged 60 years or older.

Aerobic exercise significantly reduced frailty while improving multiple aspects of physical and mental health.

Participants experienced meaningful improvements in muscle strength, lower-limb function, cognitive performance, depressive symptoms, and overall quality of life.

Benefits were observed across a variety of aerobic exercise modalities, including walking, Tai Chi, dancing, and other endurance-based activities, with no single exercise type proving superior.

Dose-response analysis suggested that low-to-moderate volumes of aerobic exercise provided substantial health benefits, while evidence supporting additional gains with higher exercise doses remained limited.

The findings support a flexible, individualized approach rather than prescribing a single optimal exercise regimen.

Clinical Impact:

This comprehensive analysis reinforces aerobic exercise as a cornerstone intervention for frailty management in older adults. Importantly, the study suggests that meaningful clinical benefits can be achieved with achievable low-to-moderate exercise volumes, making exercise prescriptions more realistic for frail individuals. Clinicians should prioritize regular participation and tailor exercise programs according to each patient's functional capacity, comorbidities, and preferences rather than focusing on a specific exercise modality.

Bottom Line:

Regular aerobic exercise significantly improves frailty, mobility, cognition, mood, muscle strength, and quality of life in frail older adults. Low-to-moderate volumes of exercise appear sufficient to achieve meaningful benefits, supporting individualized exercise prescriptions that emphasize consistency over intensity.