Chapter 8

Dumbbell Curl is the eightieth chapter of Volume 1 of the manga Dumbbell Nan-Kilo Moteru?

Summary
At Kouyou Girls Academy, Satomi tells her colleague that she is gaining weight. But her colleague can't notice it. Her colleague gives Satomi an advert sheet of Silverman's Gym and tells her to exercise. But Satomi is worried that if she see's any students at the gym but she is reassured by her colleague saying "no high school girl would ever go to a gym".

After school Hibiki and Akemi decide to go to the gym. In the locker room Satomi is shocked to see Hibiki and Akemi there. As she would have never thought that they would get along.

Because of the students she Satomi doesn't seem to be interested in joining the gym anymore. Until she meets Machio. Machio asks Satomi if she has done any exercise in the past before training and tells him that she has tried calisthenics but then stop exercising after the pain in the muscles that she has worked on.

Machio then tells to focus on muscles that aren't in pain like "dumbbell Curls".

Machio also explains that working out isn't about the weight you can lift but the "efficiency with perfect form" as it is common amongst men to ego lift.

Akemi is doing 6 kg. Hibiki is doing 4 kg. Satomi is doing 2 kg.

Akemi then notices Satomi has a diamond tan mark on her belly button and questions where she got it. They come to the conclusion it is from a weird swimsuit she wore.

It is later revealed the tan mark was from a costume and Satomi is a cosplayer.