Massey Equine, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand.
Equine Vet J. 2013 Jan;45(1):20-4. doi: 10.1111/j.2042-3306.2011.00534.x. Epub 2012 Feb 10.
There is increasing evidence that exercise early in life has a positive effect on musculoskeletal health. At present, there is little whole population research investigating the effect of racing as 2-year-olds on future racing career.
To investigate the association between attaining training milestones as 2-year-olds with length of career and racing success in Thoroughbred horses in New Zealand.
Retrospective data were obtained of the 2001/02-born Thoroughbred foal crop. The 3 training milestones were: registered with a trainer, trialled and raced. The association of the training milestones with career length was measured using the outcomes: number of race starts and number of years raced, in a Cox regression model. Logistic regression models analysed the association of the training milestones with the outcomes: won or placed in a race. Linear regression was performed to assess the association of training milestones with total career earnings.
Of 4683 horses in the population; 3152 horses were registered with a trainer, 2661 horses trialled and 2109 horses raced. Horses that raced as 2-year-olds had significantly (P<0.001) more race starts than those first raced as 3-year-olds or older, this was also true when the 2-year-old year data were omitted. Horses that raced as 2-year-olds had significantly (P<0.001) more years racing. Horses registered with a trainer, trialled or raced as 2-year-olds were more likely to have won or been placed in a race than those that achieved the milestones as 3-year-olds or older. Horses that first trialled and raced as 2-year-olds had greater total earnings than those that first trialled or raced at a later age.
Two-year-old training milestones had a strong association with positive racing career outcomes. Horses in training or racing as 2-year-olds may have better musculoskeletal health throughout life than horses that are first in training or racing at a later age.
越来越多的证据表明，生命早期的运动对骨骼肌肉健康有积极影响。目前，几乎没有针对 2 岁赛马对未来赛马生涯影响的全人群研究。
调查新西兰纯血马在 2 岁时达到训练里程碑与职业生涯长度和赛马成功的关系。
获得了 2001/02 年出生的纯血马驹的数据。3 个训练里程碑为：注册训练师、试跑和参赛。使用 Cox 回归模型测量了训练里程碑与职业生涯长度的关联，结果为：参赛次数和参赛年限。逻辑回归模型分析了训练里程碑与以下结果的关联：在比赛中获胜或获得名次。线性回归评估了训练里程碑与职业生涯总收入的关系。
在 4683 匹马中，3152 匹马注册了训练师，2661 匹马试跑，2109 匹马参赛。与 3 岁或以上首次参赛的马匹相比，2 岁参赛的马匹参赛次数明显更多（P<0.001），即使排除 2 岁的数据也是如此。2 岁参赛的马匹参赛年限明显更长（P<0.001）。2 岁注册、试跑或参赛的马匹比 3 岁或以上达到这些里程碑的马匹更有可能获胜或获得名次。首次试跑和参赛年龄为 2 岁的马匹总奖金收入高于首次试跑或参赛年龄较大的马匹。
2 岁的训练里程碑与积极的赛马生涯结果有很强的关联。在训练或 2 岁参赛的马可能比在以后的年龄开始训练或参赛的马在整个生命周期中拥有更好的骨骼肌肉健康。
