Sato T, Akatsuka H, Kito K, Tokoro Y, Tauchi H, Kato K
Mech Ageing Dev. 1986 May;34(3):297-304. doi: 10.1016/0047-6374(86)90081-3.
Micro- and ultramicromeasuring studies have been made on the age changes of surgically resected minor pectoral muscles in 200 Japanese females of various ages (26-80 years). With advancement of age, muscle fibers of type I decreased in number and increased in size, and the age-related increase in size is not considered to be due to an increase in number of myofibrils but seems to be due to an increase in their volume resulting from an increase in the number of myofilaments.
对200名不同年龄（26 - 80岁）的日本女性手术切除的胸小肌进行了微观和超微观测量研究。随着年龄的增长，I型肌纤维数量减少，体积增大，与年龄相关的体积增大并非由于肌原纤维数量增加，而是由于肌丝数量增加导致其体积增大。
