Seated Calf Raise.

Fifty-seven centimetres for the calves.

Calves are the first thing people cut when space is tight, and you see the result ten years later. This one is 575 mm wide and fits against a wall or in the gap between two large stations, so you do not have to drop something else to get it in. The thigh pad places the load directly over the knees, and the step gives you a full stretch at the bottom before you press up onto the toes, the whole range of motion, not just the top of it. The plates go on pegs (Ø50 mm), and at 60 kg dead weight you can move it yourself when the room is rearranged. The space exists. The excuse does not.