I work out with a woman who refuses to do what everyone else in the group is doing. If we all have 5lb or 10lb weights for a particular activity; she’ll make everyone wait until she can find a 2.5lb weight. And if for some reason she can’t find the smallest size/weight, she won’t do the exercise. She’s perfectly healthy and has been coming to the gym for years so there is no reason she couldn’t do the same thing as everyone else. And, incredibly, on weekends, she comes to class early so she can hide her preferred items! If anyone else did happen to pick up one of “her” weights it would be by mistake and they would be more than happy to happy to trade with her. For the exercises we do, you don’t get much of a workout with something that small/light.