Long enough to finish a small action between ticks, short enough to hold a rhythm — a three-second beat marks a three-count lowering phase on a lift, paces a sequence of shots or instrument readings, or calls a slow, even drill. Choose how many rounds you want and it runs the beat clean from the first tick to the last.
On a lift, each beep can mark a phase — lower for three, then drive — which is why tempo training leans on a beat like this. Away from the gym floor it does the same job for any task you want stepped through three seconds at a time.
A single beep every 2 seconds, looping — an unhurried beat for paced breathing, controlled rep tempo, and a steady walking cadence.
A round, easy-to-count beep every 5 seconds, repeating — for station drills, physio holds, and stroke cadence. Repeats for as long as you need.