https://www.sciencedaily.com/releases/2018/07/180723142929.htm

The rules, which notably limited full-padded practice to once per day during off season and to a total of 14 during the regular season, would change the way the game was played, critics warned -- and to its detriment.

As ESPN Monday Night Football analyst and former NFL head coach Jon Gruden explained, "The less time we spend meeting, the less time we spend practicing, the less time we spend together practicing like we're going to play on game day, the less we're going to execute, the less we're going to be disciplined and the less we're going to perform."