t get any responses here, but from googling around on the web I came to the conclusion that
diltiazem, a calcium channel blocker, would be better
for an athlete than atenolol, a beta blocker. So I called the doctor who agreed to change my medication. Yesterday on the treadmill, after having only taken one 25mg dose of atenolol my heart rate only showed a bit over 120 when I was doing a pace for which a 140 should have been called for.