Fat-free mass is related to one-mile race performance in elite standardbred horses.

The research article focuses on the relationship between body composition (specifically fat-free mass) and racing performance in elite standardbred horses. It found that a horse’s muscle mass can indicate how well they will perform in a race, with a lower percentage of body fat correlating with better race times in male horses.

Research Methods and Participants

• The researchers undertook an in vivo study, meaning they observed horses in their natural environment rather than a lab setting.
• Their study comprised 14 horses in total, split between six males and eight females.
• These horses are categorised as elite standardbreds (STB), a breed known for their excellent harness racing abilities.
• Various body measurements were taken including muscle thickness (MTH) in specific areas and rump fat, which was then used to calculate percentage body fat (%fat).

Findings

• The team found no notable differences between male and female horses in respect to age, body mass, fat-free mass (FFM), or race time (RT).
• However, male horses were found to have less fat mass and a lower percentage of body fat compared to female horses. They also had larger muscle thickness in the vastus lateralis muscle, one of the main muscles in a horse’s thigh.
• When race times were compared against fat measurements, it was observed that a lower percentage of fat and fat mass was correlated with faster race times in male horses, but not females. In other words, the leaner the male horse, the faster their race time.

Correlations and Implications

• Interestingly, the correlation between fat-free mass (i.e., muscle mass) and race time showed a trending relationship in both males and females, although the correlation wasn’t statistically significant.
• When fat-free mass and percentage fat data were combined, they were found to significantly correlate to race times, implying that both muscularity and leanness might influence a horse’s racing performance.
• The scientists, however, noticed no correlation between muscle thickness (MTH) and race times.

In sum, the study concluded that fat-free mass is indeed related to race time in elite standardbred horses. Also, less body fat might contribute to superior race performance in male horses. These findings are important for breeders, trainers, and caretakers of racing horses, giving them viable metrics to assess the potential racing performance of a horse.