Three Minute Plank is the midpoint of the plank series and the first version that changes the menu, not just the clock. Six holds of 30 seconds each: a bear plank to open, a full plank, a side elbow plank on each side with your free arm reaching for the ceiling, and two raised leg planks - one per leg - to finish. Three continuous minutes of core work with no position repeated back-to-back and no easy holds anywhere on the card.
The new additions earn their place. The bear plank - hands and toes down, knees bent and hovering just off the floor - fires the deep abdominal muscles harder than a standard plank because your knees hang unsupported under your hips, and it makes an ideal opener: it switches your whole trunk on before the longer levers arrive. The side elbow planks with the raised arm add a rotation challenge, since reaching upward pulls your torso toward twisting open and your obliques have to refuse. Ending on raised leg planks is the sting in the tail - by then your core has been under load for two full minutes, and removing one point of contact forces glutes and lower back to stabilize a tired system. Thirty-second holds are long enough that there's nowhere to hide.
In the bear plank, keep your knees an inch or two off the floor and your back flat like a tabletop - if your hips rise, the exercise quietly turns into something easier. In the side elbow planks, stack your shoulder directly over your elbow and reach your top arm straight up, keeping both hips lifted and forward. In the raised leg planks, extend the leg behind you at hip height with toes pointed back, and resist the tilt: the hip of the lifted leg will want to rotate skyward, and keeping it square is the actual exercise.
Halfway up the ladder, the holds get longer and the positions get smarter. Three minutes here is worth more than five spent slouching.
Make it Harder: Hold the bear plank for a full 60 seconds before starting the rest of the sequence.
Make it Easier: Cut every hold to 10-count and keep the order exactly as written.
