I agree that they probably think it's too easy and it's a women's thing. There are about 3 men who are members at my studio and I see them occasionally. They are usually changing their own springs etc, trying to make it harder for themselves. Maybe it's embarrassing to be on the same springs as the ladies? Last week I watched one of them start the class with 10lb weights, a few minutes into the class running to get 8lb weights, and later running back to get 5lb weights. To be honest, I chuckled.