毕竟，正如辛达尔先生所指出的，动物运用着两种肌肉纤维：一种用于耐力，一种用于快速运动。
After all, as Dr Schindall points out, animals use two types of muscle fibre: one for endurance and one for rapid movements.
在疲劳状态下快速奔跑会促使你的肌肉纤维得到增强，否则就得不到锻炼。
Running fast while fatigued forces your body to recruit muscle fibers that might otherwise go untrained.
良好的食物应含有丰富的维生素和矿物质，而且还可以提供低饱和脂肪，盐和快速释放糖和高纤维。
Good food should be rich in vitamins and minerals, and also be low in saturated fat, salt and fast-releasing sugars and high in fiber.
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