Influence of Exercise, Age, Body weight, and Growth on the Development of Tarsal Osteoarthritis in Young Mangalarga Marchador Horses.
Authors: Di Filippo Paula Alessandra, Dias Meireles Marcos Aurélio, Ribeiro Luiza Maria Feitosa, de Lannes Saulo Tinoco, Meireles Natália Ferreira Torres, Viana Inácio Silva, Hokamura Helena Kiyomi
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Early Exercise and Tarsal Osteoarthritis in Young Mangalarga Marchadors Controlled early exercise during the critical growth phase has long been debated as a risk factor for developmental joint disease, yet evidence remains limited in many breeds. Di Filippo and colleagues examined 40 young Mangalarga Marchadors over 36 months, with half receiving structured exercise consisting of progressive gallop sprints (15 minutes, three times weekly) from approximately one month of age, whilst the remainder exercised only at liberty in pasture. Radiographic assessment at 18 and 36 months revealed tarsal osteoarthritic changes in only two male foals (10%) from the trained group, with zero cases in untrained animals; notably, the trained cohort showed no significant differences in body weight, withers height, or body condition score development compared to controls. These findings suggest that appropriately graduated early exercise does not accelerate tarsal osteoarthritis development in this breed, though the low overall incidence and sex bias in affected animals warrant cautious interpretation and further investigation into individual predisposing factors. For practitioners, the data provide some reassurance that structured, progressive work during the first three years need not be abandoned on grounds of joint degeneration alone, though individual variation and breed-specific responses remain important considerations in tailoring exercise prescriptions for growing horses.
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Practical Takeaways
- •Moderate, progressive exercise starting from 1 month of age does not increase osteoarthritis risk in young horses when performed on appropriate surfaces
- •Early controlled training may be compatible with normal joint development, though larger studies are needed to establish optimal exercise protocols
- •Radiographic monitoring at 18 and 36 months can detect early tarsal OA changes in young horses undergoing training programs
Key Findings
- •Only 2 of 20 trained foals (10%) developed radiographic changes suggestive of tarsal OA by 36 months; zero cases in untrained group
- •Controlled early exercise (3 days/week gallop sprints from 30 days to 36 months) did not increase OA prevalence in young Mangalarga Marchador horses
- •Both trained and untrained groups showed significant increases in body weight and withers height between 18 and 36 months, but training did not alter morphometric parameters
- •Specific levels of physical activity during initial development appear safe for tarsal joint development in this breed