Influence of girth strap tensions on athletic performance of racehorses.

This study evaluates the impact of different girth strap tensions on the athletic performance of racehorses. The study found that lower girth tensions of less than 10 kg were optimal for performance, while higher tensions typical of race events could significantly reduce a horse’s capacity to run long distances.

Research Methodology

• The experiment included eight horses, each undergoing exercises at speeds designed to produce 80% of their maximal heart rates.
• The exercises were repeated four times using a randomised block design, and the horses were saddled with a standard canvas girth at varying tensions of approximately 5, 10, 15 or 20 kg.
• A physiograph-connected in-line load cell was used for continuous recording of the tension.
• To determine the performance limit of the horses, they were made to run on a 10% inclined treadmill until they became fatigued.

Analysis of Data

• The analysis of data was done through ANOVA, along with least squares linear regression.
• This was to establish the relationship between the distance covered, time until fatigue, and the maximum and minimum recorded tensions at inhalation and exhalation respectively.
• Tensions at peak inhalation (T/inh) and exhalation (T/exh), at rest (rest) and during exercise (ex) were measured.

Results

• Every 1 kg increase in resting girth tension corresponded to a decrease in distance to fatigue by 98.3 +/- 28.6 m and a reduction in run times by 0.24 +/- 0.07 min.
• Similar results were found for T/exhrest with a decrease of 81.3 +/- 26.9 m and 0.20 +/- 0.07 min per 1kg increase in tension.
• The experiments revealed that the mean distances to fatigue for the T/exhrest of 5, 10, 15 and 20 kg were 6624m, 5812m, 5268m and 5405m respectively.
• Distances to fatigue were found to be similar when the T/exhrest reached or exceeded 10 kg.

Conclusion

• The results of the study suggest that girths strapped at less than 10 kg tension are optimal for the performance of racing horses.
• However, in practical scenarios, such as Thoroughbred racing in Victoria, girth tensions often exceed this measure, likely compromising the horses’ performance and endurance.