From the standpoint of most spectators, football is all about the game. From the standpoint of most players, football is all about practice. What players go through at practice, particularly two-a-days, can be more grueling than what they go through during games. When coaches tell players, “Compared to practice, the game will be fun,” they aren’t kidding.
Though spectators and viewers think of games as the dangerous part of football, because it’s during games that injuries are widely seen — coaches whom I have interviewed think players are more likely to be injured at a practice than during a game. Partly this is simply because players spend so much more time practicing than performing, meaning more hours of risk.