The validity of swimming training for two-year-old thoroughbreds.

This research investigates the benefits of incorporating swimming into the training routine of young racehorses. The study found that swimming, alongside traditional running, can enhance performance, facilitate growth, and decrease the risk of locomotor diseases.

Research Methodology

• The study involved 24 two-year-old thoroughbred horses, which were divided into three groups for different training methods. The first group (Group A) adhered to running only, the second group (Group B) combined running and a gradually increasing component of swimming, while the third group (Group C) followed a regimen of running and constant swimming.

Training Impact and Performance

• The effect of the various training methods on horse performance was primarily evaluated by performing standardized exercise tests. The researchers used regression curves to study the relationship between the horse’s speed and blood lactate concentration (an indicator of aerobic endurance).
• Only Group B horses, with its blend of running and gradually increased swimming, demonstrated significant improvement in performance. The results showed increased intercepts in their regression curves as the training advanced, suggesting an enhanced capacity for performance.

Growth and Constitution Change

• Changes in the horses’ constitution — including growth in height, weight, and girth — were considered across the three groups.
• Results showed that horses in Groups B and C, both involving swimming, demonstrated more height growth than those in Group A (running only). However, the weight and girth increases in Groups B and C were smaller than those observed in Group A.

Locomotor Diseases Frequency

• The research also kept a check on the frequency of locomotor diseases, which are common in racehorses due to their intense training and performance demands.
• Horses in Group B (running and gradual swimming) and C (running and constant swimming) showed lower incidence rates of locomotor diseases, 12.5% and 25% respectively, compared to Group A’s 62.5%.
• This significant reduction (p < 0.05) in locomotor disease frequency suggests that including swimming in training could help protect young horses from certain health issues associated with high intensity running.

Conclusion

• The findings suggest that a blended training program, incorporating a careful balance of running and swimming, can present multiple benefits for young racehorses. Not only can it improve performance and support healthy growth, it can notably decrease the risk of locomotor diseases, thus ensuring smoother progress and longevity in training.