The readings that you have noted seem like false readings because while using the treadmill, it is normal to find the heart rate
increasing. If it happens again at rest then bradycardia (slow heart
rate) needs to be ruled out for which you should get a holter monitor done.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor.