Athletes can apply for an exception to use a banned substance if it is used for medical purposes. which of the following athletes is most likely to be allowed to use meldonium if she or he is using it for its original intended purpose? 1.) an olympic speedskater using it for chronic fatigue syndrome.2.) a professional tennis player using it for chronic pain.3.) a professional runner using it for a heart condition.4.) an olympic wrestler using it as a sleep aid.

3.) A professional runner using it for a heart condition

Explanation:

Meldonium is known as an endocrine modulator and was manufactured to treat heart problems. Its active ingredient, mildronate, has protective function in the heart where it controls arrhythmias, decreases chances of myocardial infarction and prevents the formation of atherosclerotic plaques. Diabetes can also be treated with the drug, which led tennis player Maria Sharapova to use it for 10 years until she was caught in the doping test and suspended in 2016 as a result.