I have had my blood pressure supervised for over ten years, and currently take atenolol and a diuretic. A combination of the medication, exercise and diet generally works for me, although I do have the occasional blip. The main exercise I take is walking, elliptical cycle and bicycle. Would it be safe to use rubber chest expanders to tone my upper body? I read somewhere that they can elevate blood pressure, but I used to be very pleased with the toning and stretching effects that I got from them.