major muscle group

基本解释

I went Monday through Friday for about 45 minutes, hitting every major muscle group.
——周一到周五，我每天大约在健身房锻炼45分钟，所有的主要肌群都练到了。
Made it to the gym 5 times. – I went Monday through Friday for about 45 minutes, hitting every major muscle group.
去了五次健身房。 ——周一到周五，我每天大约在健身房锻炼45分钟，所有的主要肌群都练到了。
Chapters are devoted to each major muscle group, with 115 total exercises for arms, shoulders, chest, back, legs, buttocks, and abdomen.
本书章节针对主要肌群，包括手臂，肩部，胸部，背部，腿部，臀部，腹部的全部115种训练。