Dumbbell keeps up the good work with a well-organized, well-paced, funny, charming, and informative episode. Sadly we don’t learn any more about Hibiki’s progress with boxing training (if any), but then that was to be expected; this is not a boxing anime! Still, that was a hell of a punch. I wonder if we’ll see another down the line…
Instead we’re introduced to Tachibana Satomi (Horie Yui!), a history teacher who wants to lose a bit of weight. When she checks out Silverman Gym she’s a little disconcerted to find two of her students there (and even more cheesed off when one of Hibiki indirectly refers to her as “old”—she’s 29) but when she meets Machio (and is instantly smitten) she sticks with it.
Machio introduces her to dumbbell curls, which help build one’s biceps as part of balanced training with push-ups (which help build triceps). When Satomi gets hot and rolls up her shirt, Hibiki and Akemi notice a strange tan spot on her stomach, and she manages to conceal the true cause: her secret cosplay hobby.
The middle segment involves Akemi joining Ayaka and Hibiki for lunch, and Hibiki learns that far from being ideal for getting a nice bikini body, her diet is actually far better suited for a sumo thong. Akemi explains that suddenly gorging on an empty stomach boosts blood sugar and insulin production, resulting in weight gain, not loss.
But not all is lost: she suggests Hibiki shift to the diet of bodybuilder, most of whom seek a limit of 3% body fat before a contest, essentially making them dieting pros. It’s all about eating smaller meals high in protein but low in fat, which means boiling or steaming foods that normally sauteed or fried. Snacks like protein bars and shakes prevent hunger without adding fat.
When Hibiki laments that such a radical shift in her diet is miserably untenable, Akemi gives her some relief: the occasional “cheat day”, typically once a week, prevents a dieter’s body from going into energy conservation mode in addition to the psychological boost that comes from eating tasty stuff. Unfortunately, Hibiki still doesn’t grasp that she’ll have to start actually dieting for a while before having her cheat day!
We finish with another Satomi-POV segment, as she’s sufficiently slimmed down to wear a revealing sailor suit (KanColle?) to an event at Tokyo Big Sight, where she’s an instant sensation. That’s when she notices Hibiki and Akemi are there, but not for her; for Machio, who agreed to cosplay as the “Muscle King” in an anime apparently everyone in the world except Satomi has heard of.
The horde of cameramen circling her quickly shift to Machio, who is all too happy to destroy his costume with an iconic front press, then proceeds to explain the front press’ proper form. At day’s end, Satomi is just happy her students didn’t discover her cosplay hobby, but they do spot her as she’s slinking away with her suitcase, and lets Hibiki think she’s a doujinshi fan. Better than the alternative!