What Is a Plank Timer?
A plank timer is an interval timer designed for core holds. You hold the plank for a fixed duration, rest briefly, then repeat for multiple sets. TimerKit defaults to 3 rounds of 1:00 on and 0:20 off, which is long enough to build tension without forcing sloppy form.
How to Use This Plank Timer
Hit Start and focus on your form, not the clock. Keep your shoulders stacked over your elbows, squeeze glutes, brace your core, and breathe steadily through each hold. The timer automatically switches from hold to break and tells you when the next set starts.
Best Plank Progression for Most People
Start with the default 3x1:00 with 20-second breaks. Once that feels clean, add one set before increasing hold time. A practical progression is 3x45s, then 3x60s, then 4x60s, then 3x75s. Progression works better when quality stays high and hips stay level.