Retirement risk factors, exercise management and muscle mass in US senior horses.
Authors: Herbst Alisa C, Coleman Michelle C, Macon Erica L, Brokman Aviv, Stromberg Arnold J, Harris Pat A, Adams Amanda A
Journal: Equine veterinary journal
Summary
# Editorial Summary: Retirement Risk Factors, Exercise Management and Muscle Mass in US Senior Horses This large-scale analysis of 2,717 US senior horse owners reveals that nearly 40% of horses aged 15 years and older are fully retired, with health problems accounting for the majority of early retirements between ages 15 and 24. Risk factors for retirement include advancing age, female sex, Thoroughbred breeding, and conditions such as osteoarthritis and laminitis, whilst working seniors show progressively reduced exercise intensity with each additional year. Low muscle mass affects approximately 17% of senior horses and emerges as a significant welfare concern, with geldings, those with pituitary pars intermedia dysfunction (PPID), and retired or semi-retired horses at elevated risk compared to competition animals. The findings underscore a critical gap between current practice (broad retirement) and potential benefits of structured exercise in ageing horses—a principle well established in geriatric human medicine—suggesting that better characterisation and management of specific health conditions could extend active lifespan and preserve both muscularity and quality of life. For practitioners working with senior populations, these data highlight the importance of targeted exercise programmes, early identification of PPID and musculoskeletal disease, and proactive strategies to prevent sarcopenia in horses transitioning toward or already in retirement.
Read the full abstract on PubMed
Practical Takeaways
- •Nearly 40% of senior horses are fully retired; early identification and management of health problems may extend working life and maintain functional muscle mass
- •One in six senior horses has clinically apparent low muscle mass—implement structured exercise programs and nutritional management to prevent sarcopenia and maintain welfare
- •Endocrine diseases (PPID), joint conditions, and laminitis are strong drivers of muscle loss in older horses; targeted management of these conditions may preserve muscular function
Key Findings
- •38.5% of senior US horses (≥15 years) are used for pleasure riding/driving, while 39.8% are fully retired
- •61.5% of horses are retired between 15-24 years of age, with health problems as the primary reason
- •Low muscle mass affects 17.2% (95% CI: 15.7-18.7%) of senior horses and is associated with impaired work ability and welfare
- •Risk factors for low muscle mass include increasing age, gelding sex, pituitary pars intermedia dysfunction, osteoarthritis, laminitis, and retired/semi-retired status versus competitive use