Five Minute Plank is the summit of the plank series: 300 unbroken seconds of core work. A full 60-second plank opens the workout, followed by a 30-second elbow plank, 60 seconds of raised leg planks at 30 per leg, 60 seconds of side planks at 30 per side, a 30-second full plank, and a closing 60-second elbow plank. Six positions, five minutes, and not one second of it spent lying down - despite appearances.

The structure is a deliberate wave. It opens with the longest full plank of the entire series, spending your freshest minute on the foundational hold, then drops to a shorter elbow plank that feels almost like relief - a trick this workout plays more than once. The single-leg and side work arrives in the middle, where removing a contact point or turning sideways redistributes the load to glutes, hips and obliques just as your front line starts fading. Then comes the real test: the final 90 seconds return you to basic planks precisely when nothing about them feels basic anymore. Holding textbook form on a fatigued core is what separates a five-minute plank from five minutes of sagging, and it's the adaptation this finale is designed to force.

Ration your effort like you would on a long run - the first 60 seconds should feel almost easy, because you're saving your bracing strength for minute four. Keep a straight head-to-heel line in every horizontal hold: glutes tight, pelvis tucked, shoulders pushed away from your ears. In the raised leg planks, a low, controlled lift with square hips beats a high leg with a twisted spine. In the side planks, stack your shoulder over your supporting arm and keep your hips off an imaginary floor two inches below the real one. When your body starts bargaining in the final elbow plank, shrink the problem: hold for just ten more seconds, six times.

Five minutes ago this looked like a stretch of floor. Now it's the whole series, conquered - every rung of the plank ladder under your belt.

Make it Harder: Wear a loaded backpack for the opening and closing 60-second holds.

Make it Easier: Take each hold to failure, rest briefly on your knees, and rejoin the sequence where you left off - completion first, continuity later.