Why is the Big Ten requiring the following for all student-athletes diagnosed with COVID-19? Fear of lawsuits? Negative publicity? Because they have the $ to do this testing? Valid concerns regarding the risks of myocarditis associated with COVID-19?

From this release: All COVID-19 positive student-athletes will have to undergo comprehensive cardiac testing to include labs and biomarkers, ECG, Echocardiogram and a Cardiac MRI. Following cardiac evaluation, student-athletes must receive clearance from a cardiologist designated by the university for the primary purpose of cardiac clearance for COVID-19 positive student-athletes. The earliest a student-athlete can return to game competition is 21 days following a COVID-19 positive diagnosis.

From the articles I've read, including this NYT article from September, you don't have to be seriously ill with COVID-19 to be diagnosed with myocarditis after testing positive for COVID-19.

Until there is more data regarding the risks of long-term health effects from COVID-19, I'm being cautious. I've reduced my training load about 20% since April and 99% of my training has been at a moderate pace. I'm 61 and in excellent health for my age.