How Heavy Are the Dumbbells You Lift? (Original Japanese Version)

Dismayed by her recent weight gain, high school girl and food lover Hibiki Sakura joins Silverman Gym. The hordes of muscle men at the gym are intimidating, but Hibiki gives strength training a try after meeting the handsome trainer Machio Naruzo.

Machio explains why exercising causes you to gain both weight and muscle, and describes how to do a lat pulldown. Akemi lectures on the importance of dynamic stretching. Hibiki learns about Ayaka's family business.

Satomi Tachibana, one of Hibiki's teachers, comes to Silverman Gym to lose some weight. Can she hide her secret hobby from her students? Ayaka joins Hibiki and Akemi for lunch, and notices that something about Hibiki's bento feels off…

A crowded gym forces Hibiki and Akemi to use different equipment than usual. Ayaka joins them on a day when they have no choice but to train at home. And finally, the long-awaited beach day arrives.

Hibiki embarks on a special training regime in preparation for Sports Day. After the event is over, she hatches a plan to win the grand prize in the Silverman Gym raffle.

Determined to buy a home theater system, Hibiki enters the Silverman Gym arm wrestling tournament for the chance to win 100,000 yen. How will she fare against Zina, her Russian opponent? It turns out she has a lot to teach Hibiki and her friends…

Hibiki, Akemi, and Ayaka hold a welcome party for Gina. Tachibana-sensei deals with the consequences of Gina discovering her secret hobby. The gang enters an idol competition.

Two more teachers from Hibiki's school join Silverman Gym. A field trip goes bad when Hibiki's group gets lost. How will they survive?

The daily routine at Silverman Gym is interrupted by the arrival of a man from Machio's past.

Hibiki and the gang attend the Silverman Gym Christmas party, drawn in by the prospect of finding a boyfriend among the male attendees.

Hibiki and her friends visit an unusual shrine for New Year's, encounter difficulties when planning their first workout of the year, and enter an amateur talent show.

Hibiki and the other regulars at Silverman Gym take a trip to the tropical paradise of Nikunoshima over spring break. Who among them will claim the title of Miss Nikunoshima?