Hi , I Am 29, Female, Type 1 Diabetic For

Hi , I am 29, female, type 1 diabetic for 16 years, control is grand apart from few bad years as a teenager. Returned to swimming 3 years ago and proper workouts with a personal trainer, always found my claves would get tight - even as a teenager, but now seem to be worse only happens when I am exercising.
could this be related to diabeties or just my bad luck with muscles - trainer has had to change my exercises as I put on muscle very quickly and bulk up.