Saw a post about a celebrity trainer’s three-minute arm workout using a single dumbbell. She says it’s perfect between Zoom calls or lunch breaks. Right. I can’t even find three uninterrupted minutes to finish my vanilla latte without a student popping in to beg for extra credit. A 12-pound dumbbell? The heaviest thing I lift these days is a stack of 30 essay notebooks. Not exactly a routine that fits the teacher who spends most of the day hunched over a desk or breaking up hallway squabbles. Pass.