How often should you sub in youth sport?
Choose a substitution reminder interval that fits your sport, competition rules and coaching plan.
Set reminders to an interval that fits your match format and local substitution rules; no one interval is right for every youth sport.
There is no universal interval
Substitution rules and game periods vary by sport, age and competition. A timer can remind you of a plan, but it cannot decide who should play or establish a legal substitution window. Check the rules that apply to your team.
Choose a practical interval
Start with period length and available change opportunities. A shorter interval means more reminders and more changes to coordinate. A longer interval is simpler to follow but may not match your playing-time aim. Treat the interval as a coach-selected planning input.
Worked example: four 12-minute periods
The timer’s example uses 12-minute periods and a six-minute interval. It places alerts at minutes 6 and 12 in each period, producing eight reminders across the game, including the period-end reminders. You can change both values to match your own format.
Use reminders without losing sight of play
Keep the timer where the coach or designated helper can see it. Pause or adjust the plan when there is an injury, a stoppage or a rule that changes the substitution opportunity. The referee and competition rules take precedence.
Sources and method
- The FA: Law 3, the Players and substitution procedure (official source; checked )
- LineupSheet timer example and alert calculation (LineupSheet method; checked )