Short of breath and being dizzy after 1 mile of walking. Been doing 2-21/2 m. 4 days/week 20 years. BP 126 / 68, chest x- rays neg., lung function OK, blood work. OK., non- nuclear? Stress heart test. Ok. Little better in last week or two. There is like a pressure in the upper part of my chest. Not painfall, just unpleasant and Feels like high blood pressure, if that is even what it feels like.