Thanks for using Healthcaremagic,
After going through the all available details, it is common to have low pulse rate in athletes due to parasympathetic stimulation.
Palpitations can be there due to various causes like ventricular premature beats
or other kind of arrhythmia
Your blood pressure and cholesterol
is all right what treatment you are taking is not clear as you have not mentioned drugs.
You should visit a cardiologist and check for ECG and 2D Echocardiography
to see everything is fine, we need to exclude valve defects, and cardiomyopathy
if required Holter monitoring may be performed to find out exact type of arrhythmia.
Treatment depends on cause in the mean time avoid too much tea, coffee, alcohol or smoking.
Hope this information helps
Wish you good health.
Dr.Akhilesh Dubey M.D.