Two-a-days are the rite of passage that starts every high school football season. They are also the period when heat illness is most likely, which is why almost every state has regulated them.

The basic structure: one morning practice, one afternoon practice, usually separated by a three-to-four-hour rest period. Duration varies by program but typically runs 90 minutes to two hours per session. The first week is usually lighter contact or no contact at all, following the heat acclimatization protocols most state athletic associations now require.

What state regulations typically cover: the number of days before a player can wear full pads (usually four to five days minimum in shells or helmets-only first), the maximum practice time per session, the required rest period between sessions, and wet-bulb globe temperature limits that suspend or modify practice in extreme heat. Your state’s athletic association website has the specifics. Look them up before camp starts.

What your kid needs to bring every single day: a full water bottle and a way to refill it, their own snacks for the break period (a lunch, not a bag of chips), sunscreen, and any prescribed medications. The program will not remind them about any of this.

The heat piece is serious. Exertional heat stroke is the leading cause of preventable death in high school athletics, and football in August is when it happens most often.

The symptoms to know: extremely hot skin, confusion, stopping sweating, collapsing. This is different from heat exhaustion (heavy sweating, nausea, cramps, lightheadedness).

Heat stroke is a 911 call. Do not drive them to the ER first.

Sleep during two-a-days: this is the variable most families underestimate. Kids are training twice a day in the heat while their bodies are still growing. Eight to nine hours is the floor.

The kid who stays up until midnight on his phone during two-a-day week is not recovering. His performance in the afternoon session reflects that, and so does his injury risk.

The mental side: two-a-days separate the kids who showed up in shape from the ones who did not. That is partly the point.

The first week tells the coaching staff a lot about who put in work over the summer and who is starting from scratch. Your kid already knows which one they a