Here's copy/paste chunks from the release that detail the medical protocols involved now. It doesn't specify which form of daily testing is involved.
• The Big Ten will require student-athletes, coaches, trainers and other individuals that are on the field for all practices and games to undergo daily antigen testing. Test results must be completed and recorded prior to each practice or game. Student-athletes who test positive for the coronavirus through point of contact (POC) daily testing would require a polymerase chain reaction (PCR) test to confirm the result of the POC test.
• Each institution will designate a Chief Infection Officer (CInO) who will oversee the collection and reporting of data for the Big Ten Conference. Team test positivity rate and population positivity rate thresholds will be used to determine recommendations for continuing practice and competition.
• 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.
In addition to the medical protocols approved, the 14 Big Ten institutions will establish a cardiac registry in an effort to examine the effects on COVID-19 positive student-athletes. The registry and associated data will attempt to answer many of the unknowns regarding the cardiac manifestations in COVID-19 positive elite athletes.
• The Big Ten Conference will use data provided by each Chief Infection Officer (CInO) to make decisions about the continuation of practice and competition, as determined by team positivity rate and population positivity rate, based on a seven-day rolling average:
- Team positivity rate (number of positive tests divided by total number of tests administered):
- Green 0-2%
- Orange 2-5%
- Red >5%
- Population positivity rate (number of positive individuals divided by total population at risk):
- Green 0-3.5%
- Orange 3.5-7.5%
- Red >7.5%
Decisions to alter or halt practice and competition will be based on the following scenarios:
- Green/Green and Green/Orange: Team continues with normal practice and competition.
- Orange/Orange and Orange/Red: Team must proceed with caution and enhance COVID-19 prevention (alter practice and meeting schedule, consider viability of continuing with scheduled competition).
- Red/Red: Team must stop regular practice and competition for a minimum of seven days and reassess metrics until improved.
The daily testing will begin by September 30, 2020.