I Followed Up: Why is there the word "day" in "Don't skip the leg day" ...?

Response:

The "day" in "Don't skip leg day" refers to the way many workout routines are structured. In these routines, different muscle groups are trained on specific days—commonly known as a "split." For example, one day might be focused on chest and arms, another on back and shoulders, and a separate "leg day" is dedicated to lower body exercises. The phrase emphasizes not skipping the day designated for leg workouts, which can be tough but essential for balanced strength and development.