Training Methodology
Two-a-Days
Two-a-days refers to a practice or training schedule that includes two sessions in a single day, typically associated with preseason football camps but used across team sports during summer training periods. In football, two-a-days traditionally involve a morning practice and an afternoon practice, often in full pads, during the weeks before the season officially begins. The format became standard in American football at all levels and was largely unquestioned for decades. That changed significantly after a series of heat-related player deaths and mounting evidence about overuse injury risk, leading to systematic rule changes at the high school and collegiate levels starting in the 2000s and accelerating through the 2010s.
Rule changes and current landscape
The NFHS (National Federation of State High School Associations) and most state athletic associations now have explicit guidelines limiting or structuring two-a-day sessions, including mandatory acclimatization periods at the start of preseason, limits on consecutive two-a-day days, required rest intervals between sessions, and heat monitoring requirements. The NCAA has similar regulations at the collegiate level. Coaches should know their state’s specific rules before designing a preseason camp schedule. Running two-a-days in violation of state guidelines creates genuine liability exposure, and more importantly, puts athletes at real risk.
Programming two-a-days when they are permitted
When two-a-days are appropriate and within guidelines, the key programming principle is session differentiation. Morning and afternoon sessions should not simply be two identical practices. One session should be higher intensity with full contact or competitive work; the other should be lower intensity with technique work, walkthroughs, or conditioning at reduced load. Recovery nutrition and hydration between sessions matters considerably. Coaches who run two full-intensity sessions back to back without adequate recovery time between them are not getting double the training effect. They are accumulating fatigue and increasing injury risk without proportional performance benefit.
Related terms
Heat Acclimation · WBGT (Wet-Bulb Globe Temperature) · Load Management · ACWR (Acute:Chronic Workload Ratio) · Preseason Conditioning