17,athlete.tired all the time.after practice get very sleepy.never felt this way. eat well and hydrated. pronounced pounding of heart w exertion.

More info please: Are you sleeping well? Any recent fever or other viral symptoms? What is your sport? While the new symptom of heart pounding may be significant, the sleepiness is not usually a feature of exercise intolerance related to an abnormal heart rhythm. Most patients report malaise, dizziness, fainting or nausea and vomiting. There can sometimes be swelling of limbs. Do you have any of these signs?