Street Workout is a Manga/Manhwa/Manhua in english language, Manhw series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Baek Dong-hee, is a high school student who once pursued her dream of being the best b-boy in the world, lost both her dreams and hopes due to an accident. One day, he meets Kwon Jini, a girl who works out by chance, and his life, which had stopped, begins to move again.