Plank Timer

Longer is not better. Strength coaches who work with the plank generally recommend holds of 20 to 60 seconds with perfect form, repeated for two to four sets, rather than a single multi-minute hold. Once you can hold 60 seconds comfortably, the exercise has stopped getting harder in a useful way; add difficulty instead by lifting a leg, moving the elbows forward, or switching to side planks and dynamic variations. Records of many hours exist, but they train endurance in a fixed position, not core strength.

A rough benchmark for healthy adults: under 30 seconds, build up; 30–60 seconds, solid; over 90 seconds, time to progress the exercise rather than the clock.

• Elbows under shoulders, forearms parallel, fists relaxed.
• Body in a straight line from head to heels; look at the floor a little in front of your hands.
• Squeeze the glutes and brace the abdomen as if about to be poked; this stops the lower back sagging, which is the most common fault and the one that causes pain.
• Breathe normally. Holding the breath raises blood pressure and shortens the hold.
• Stop the set when form breaks: hips drop, shoulders hunch, or the body starts to shake hard. That is the useful end point, not a clock.

Choose a goal (30, 45, 60 or 90 seconds) and the timer counts down with a tone at the end, or use count-up mode to see how long you can hold with good form. Your personal best is saved on this device. For a full set with rests between holds, the interval timer can run, for example, 40 seconds hold and 20 seconds rest for four rounds; for a circuit that mixes planks with other exercises, the workout timer. A simple progression: add 5 seconds to the goal each week until 60, then switch to harder variations at 45 seconds.