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，我每天大約在健身房鍛鍊45分鍾，所有的主要肌群都練到了。
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，我每天大約在健身房鍛鍊45分鍾，所有的主要肌群都練到了。
Chapters are devoted to each major muscle group, with 115 total exercises for arms, shoulders, chest, back, legs, buttocks, and abdomen.
本書章節針對主要肌群，包括手臂，肩部，胸部，背部，腿部，臀部，腹部的全部115種訓練。