Chapter 5

Plank is the fifth chapter of the manga Dumbbell Nan-Kilo Moteru?.

Summary
"The Seven Commandos 4: The Great Escape of Fury" was released which Hibiki and Ayaka are big fans of the show. Ayaka invites Hibiki to go to her house after school to watch the new film. While they are watching, Ayaka's older sister asks for her help with running the family business, which is a boxing gym behind their house. As Hibiki watches Ayaka training the boxing members, she realises Ayaka has a great body, which she explains is due to the exercises she does. Ayaka's sister then recommends that Hibiki tries the punching bag, with the latter shocking everyone by punching it so hard it flies off its hinges and into the wall. Ayaka's sister then humorously states she would train Hibiki.

Exercises Learned
The exercises that are focused on in this chapter are dragon flags and the plank.

Trivia

 * Harnnold Dogegenchonegger is first seen on the covers of the action movies Hibiki and Ayaka are watching.
 * cameos when Uehara Ayaka mentions that a few champion boxers have trained at their gym.