Hill R C, Lewis D D, Scott K C, Omori M, Jackson M, Sundstrom D A, Jones G L, Speakman J R, Doyle C A, Butterwick R F
Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville 32610-0126, USA.
Am J Vet Res. 2001 Mar;62(3):440-7. doi: 10.2460/ajvr.2001.62.440.
To determine effects of increased dietary protein and decreased dietary carbohydrate on hematologic variables, body composition, and racing performance in Greyhounds.
8 adult Greyhounds.
Dogs were fed a high-protein (HP; 37% metabolizable-energy [ME] protein, 33% ME fat, 30% ME carbohydrate) or moderate-protein (MP; 24% ME protein, 33% ME fat, 43% ME carbohydrate) extruded diet for 11 weeks. Dogs subsequently were fed the other diet for 11 weeks (crossover design). Dogs raced a distance of 500 m twice weekly. Rectal temperature, hematologic variables before and after racing, plasma volume, total body water, body weight, average weekly food intake, and race times were measured at the end of each diet period.
When dogs were fed the MP diet, compared with the HP diet, values (mean +/- SD) differed significantly for race time (32.43 +/- 0.48 vs 32.61 +/- 0.50 seconds), body weight (32.8 +/- 2.5 vs 32.2 +/- 2.9 kg), Hct before (56 +/- 4 vs 54 +/- 6%) and after (67 +/- 3 vs 64 +/- 8%) racing, and glucose (131 +/- 16 vs 151 +/- 27 mg/dl) and triglyceride (128 +/- 17 vs 104 +/- 28 mg/dl) concentrations after racing.
Greyhounds were 0.18 seconds slower (equivalent to 0.08 m/s or 2.6 m) over a distance of 500 m when fed a diet with increased protein and decreased carbohydrate. Improved performance attributed to feeding meat to racing Greyhounds apparently is not attributable to increased dietary protein and decreased dietary carbohydrate.
确定增加日粮蛋白质和减少日粮碳水化合物对灵缇犬血液学指标、身体成分和赛跑成绩的影响。
8只成年灵缇犬。
给犬饲喂高蛋白（HP；37%代谢能[ME]蛋白质、33% ME脂肪、30% ME碳水化合物）或中蛋白（MP；24% ME蛋白质、33% ME脂肪、43% ME碳水化合物）的挤压日粮，持续11周。随后，犬再饲喂另一种日粮11周（交叉设计）。犬每周进行两次500米的赛跑。在每个日粮期结束时，测量直肠温度、赛跑前后的血液学指标、血浆量、总体水、体重、平均每周食物摄入量和赛跑时间。
当犬饲喂MP日粮时，与HP日粮相比，赛跑时间（32.43±0.48秒对32.61±0.50秒）、体重（32.8±2.5千克对32.2±2.9千克）、赛跑前（56±4%对54±6%）和赛跑后（67±3%对64±8%）的血细胞比容、以及赛跑后的葡萄糖（131±十六对151±27毫克/分升）和甘油三酯（128±17对104±28毫克/分升）浓度的值（均值±标准差）存在显著差异。
当给灵缇犬饲喂蛋白质增加而碳水化合物减少的日粮时，在500米的距离上，它们的速度要慢0.18秒（相当于0.08米/秒或2.6米）。给赛跑灵缇犬喂食肉类带来的性能提升显然并非归因于日粮蛋白质增加和日粮碳水化合物减少。
