I am an otherwise healthy, active 60-year old man. Recently, I decided I wanted to get more fit ... so upped my normal exercise program ... to include more heart-elevating activities such as running hills, a bicycle spin glass at my local gym and swimming. I felt fine yesterday while running hills; however, today I am experiencing pain in my chest on the right side. Inevitably suppose, it has me wondering about the symptoms of heart attack. What would they be?