Chapter 41

Ab Roller is the forty-first chapter of the manga Dumbbell Nan-Kilo Moteru?.

Plot
While cleaning her room, Gina finds some strange things. At school, Hibiki and Gina show them to Akemi and Ayaka who reveal to them that one of the items was none other than an Ab roller, a tool used for abdominal exercises. Overhearing the conversation, Satomi-sensei tries it out herself but ends up putting her back out.

Exercise Learned
The focus of this chapter is the use of an Ab roller.