Nevill M E, Williams C, Roper D, Slater C, Nevill A M
Department of Physical Education and Sports Science, Loughborough University of Technology, UK.
J Sports Sci. 1993 Apr;11(2):119-26. doi: 10.1080/02640419308729975.
Eighteen games players (9 males, 9 females) performed 30 maximum 6-sprints on a non-motorized treadmill. Each sprint was preceded by a 60-s jog at 40% maximum speed and was followed by a 54-s walk at 20% maximum speed. Thus, the entire test was of 60-min duration. The subjects were then randomly assigned to three groups and repeated the 1-h test 24 h later after consuming either a high, normal or low carbohydrate diet (79 +/- 3, 47 +/- 8, 12 +/- 1% CHO, respectively). During trial 1, mean power output declined from 653 +/- 131 to 600 +/- 158 W during the 30 sprints (P < 0.01) and power output was lower during trial 2 than during trial 1 (n = 18, P < 0.01). During trial 2, there were no differences in sprint performance between the dietary groups for the exercise test as a whole (trial 2 mean power lower than trial 1 by 0.2, 0.5 and 5.0% for the high, normal and low CHO groups, respectively; N.S.), but if only the first nine sprints are considered, then the high CHO group performed better than the low CHO group (P < 0.05). Blood lactate and glucose concentrations were lower during trial 2 than trial 1 by 4.5, 13.8 and 29.0% (lactate) and 14.9, 11.3 and 35.8% (glucose) for the high, normal and low CHO groups, respectively (both P < 0.01). Thus, both the metabolic responses to, and the performance of, maximum intermittent exercise were reduced when the test was repeated after 24 h recovery.(ABSTRACT TRUNCATED AT 250 WORDS)
18名运动员（9名男性，9名女性）在一台非电动跑步机上进行了30次最大强度的6秒冲刺跑。每次冲刺跑前有一段以40%最大速度进行的60秒慢跑，之后是一段以20%最大速度进行的54秒步行。因此，整个测试时长为60分钟。然后将受试者随机分为三组，并在24小时后分别食用高碳水化合物、正常碳水化合物或低碳水化合物饮食（碳水化合物含量分别为79±3%、47±8%、12±1%）后重复进行1小时测试。在第一次测试中，30次冲刺跑期间平均功率输出从653±131瓦降至600±158瓦（P<0.01），且第二次测试时的功率输出低于第一次测试（n = 18，P<0.01）。在第二次测试中，就整个运动测试而言，不同饮食组的冲刺跑表现没有差异（高、正常和低碳水化合物组第二次测试的平均功率分别比第一次低0.2%、0.5%和5.0%；无显著性差异），但如果只考虑前9次冲刺跑，那么高碳水化合物组的表现优于低碳水化合物组（P<0.05）。高、正常和低碳水化合物组第二次测试时的血乳酸和血糖浓度分别比第一次低4.5%、13.8%和29.0%（乳酸）以及14.9%、11.3%和35.8%（葡萄糖）（均P<0.01）。因此，在24小时恢复后重复测试时，最大间歇运动的代谢反应和表现均有所降低。（摘要截选至250词）
