Out of shape - not physically healthy enough for difficult exercise because you have not been involved in physical activities
Ru: не в форме (физической)
I'm so out of shape that I get out of breath climbing the stairs.
Я настолько не в форме, что задыхаюсь, когда поднимаюсь по лестнице.
Are you IN good shape?
Manga: Sakamoto Days