How Many Kilograms are the Dumbbells You Lift? / Dumbbell Nan Kilo Moteru? - 100 sit-ups a d- Oh, wait. Wrong series.

Don’t forget fitness: The manga does a good job at presenting the information on how to exercise.

I've read that manga, it goes from [generic slice of life] to [generic ecchi] to JoJo in the span of 5 panels on multiple occasions.