(A-P) – The Big Ten has told its schools that until further notice full contact football practices cannot begin. The conference announced all teams will remain in the first two days of what is known as the “acclimatization period” as teams work in just helmets. The Big Ten said all other fall sports will continue to work with team physicians and athletic trainers to adjust practices to the appropriate level of activity.

The University of Iowa football program held its first practice on Friday, according to posts to its Twitter account. Players were seen in photographs wearing helmets but no pads. Players and coaches were also shown wearing cloth face masks.