Kearns C F, McKeever K H, Kumagai K, Abe T
Equine Science Center, Department of Animal Science, Rutgers-The State University of New Jersey, 84 Lipman Drive, New Brunswick, NJ 08901-8525, USA.
Vet J. 2002 May;163(3):260-6. doi: 10.1053/tvjl.2001.0656.
This study examined whether body composition was predictive of competitive success in elite standardbreds (STB). Rump fat and muscle thickness (MTH) (vastus lateralis/intermedius [VL], extensor carpi radialis [ECR]) were measured in vivo in male n=6; female n=8 by B-mode ultrasound. Percentage body fat (%fat) was calculated from rump fat. There were no gender differences for age, body mass (males 432+/-11 kg; females 443+/-13 kg), fat-free mass (FFM) (males 400+/-12 kg; females 400+/-11 kg), ECR MTH (males 61+/-2 cm; females 60+/-2 cm) or race time (RT) (males 113+/-3 s; females 114+/-2 s). Males had less (P<0.05) fat mass (males 32+4 kg; females 44+/-3 kg) and %fat (males 7.4+/-0.9%; females 9.9+/-0.5%) and larger (P<0.05) VL MTH (males 88+/-7 cm; females 81+/-3 cm). RT was correlated to %fat and fat mass in males (r=0.89; r=0.82, P<0.05) not females (r=0.51; r=0.14). FFM tended to relate to RT in males (r=-0.76, P=0.07) and females (r=-0.59, P=0.12). Combined %fat and FFM data were correlated to RT (%fat r=0.70, P<0.01; FFM r=-0.65, P<0.01). RT was not correlated to MTH (VL r=-0.28; ECR r=-0.31). In conclusion, FFM was related to RT in elite STB with %fat negatively related to RT in males.
本研究调查了身体组成是否能预测优秀标准赛马（STB）的比赛成绩。通过B超在活体中测量了6匹雄性和8匹雌性STB的臀部脂肪和肌肉厚度（MTH）（股外侧肌/股中间肌[VL]、桡侧腕伸肌[ECR]）。根据臀部脂肪计算体脂百分比（%fat）。在年龄、体重（雄性432±11千克；雌性443±13千克）、去脂体重（FFM）（雄性400±12千克；雌性400±11千克）、ECR MTH（雄性61±2厘米；雌性60±2厘米）或比赛时间（RT）（雄性113±3秒；雌性114±2秒）方面，不存在性别差异。雄性的脂肪量（雄性32±4千克；雌性44±3千克）和%fat（雄性7.4±0.9%；雌性9.9±0.5%）较少，而VL MTH较大（P<0.05）（雄性88±7厘米；雌性81±3厘米）。RT与雄性的%fat和脂肪量相关（r=0.89；r=0.82，P<0.05），与雌性无关（r=0.51；r=0.14）。FFM在雄性（r=-0.76，P=0.07）和雌性（r=-0.59，P=0.12）中均与RT有一定关联。%fat和FFM的综合数据与RT相关（%fat r=0.70，P<0.01；FFM r=-0.65，P<0.01）。RT与MTH无关（VL r=-0.28；ECR r=-0.31）。总之，在优秀STB中，FFM与RT相关，而在雄性中%fat与RT呈负相关。
