How Heavy Are the Dumbbells You Lift? (ダンベル何キロ持てる？,Danberu Nan-Kiro Moteru?, lit. "Dumbbell Nan Kilo Moteru?") is a Japanese manga series written by Yabako Sandrovich and illustrated by MAAM. It has been serialized via Shogakukan's Ura Sunday website and MangaONE app since 2016 and has been collected in seven tankōbon volumes. The manga is licensed in North America by Seven Seas Entertainment. An anime television series adaptation by Doga Kobo premiered on July 3, 2019.
A second year High School girl who decides to go to the Silverman Gym in order to lose her increase in body fat. Due to lack of regular physical activity, she tends to tire out easily, furthermore, her terrible eating habits (consuming multiple forms of junk food during the day), tend to counter most of the progress she achieves through exercise.
A second year High School girl and School President of the same school as Sakura. She's popular in her school due to being a beautiful girl who excels in sports and academics along with coming from a rich family. She has a muscle-fetish and joins the Silverman Gym mostly to satisfy these desires. Unlike Sakura, she is in much better physical condition.
A trainer at the Silverman Gym who regularly coaches Sakura and Sōryūin. Due to Sakura getting a crush on him at first sight, this becomes her primary motivation to join. He's a dedicated, kindhearted and polite professional who always earnestly helps and supports Sakura. Although belying his charming demeanor and handsome profile, he is deceptively muscular. While normally looking lean in frame while covered up, he in fact has such large and well-defined physique that once he flexes his muscles, he reveals a muscle-mass so big he literally rips his clothes, comically making him become much larger and overall sporting a massive frame that is contrasting with his babyface.
An anime television series adaptation was announced on January 15, 2019. The series is animated by Doga Kobo and directed by Mitsue Yamazaki, with Fumihiko Shimo handling series composition, Ai Kikuchi designing the characters, and Yukari Hashimoto composing the music. It premiered on July 3, 2019 on AT-X, Tokyo MX, KBS, SUN, and other channels. The opening theme is "Onegai Muscle" (お願いマッスル) performed by Ai Fairouz and Kaito Ishikawa, and the ending theme is "Macho A Name?" (マッチョアネーム？) performed by Ishikawa.Funimation has licensed the series.