人的肌肉主要是由两大类不同的肌纤维混合组成的，即红肌纤维和白肌纤维。红肌纤维也称侵肌纤维，由于它们周围的毛细血管丰富，在运动时氧化脂肪的能力较强，而它们本身较细，对发达肌肉体积的作用较差。所以胖人应该注意红肌纤维的锻炼。当锻炼的强度在最大肌力的30％以下时 Human muscle is mainly composed of two types of different muscle fibers, namely, red muscle fibers and white muscle fibers. Red muscle fibers, also known as invader fibers, have a high ability to oxidize fat during exercise due to the abundance of capillaries around them, which are themselves thin and have a poor effect on the developed muscle mass. So fat people should pay attention to red muscle fiber exercise. When the intensity of exercise less than 30% of the maximum muscle strength