More ideas from Heidi
Do the Plank Power Progression to TIGHTEN, compress, and steamroll your core. It's a brutal supercircuit that burns like 1000 hells, but it's ridiculously effective for building tight, undulating abs.  Throw 2-3 into your ab workout. GIDDY UP.

Build a strong, compact, pancake-flat set of abs with The Plank Power Progression; an excruciating circuit designed to escalate in difficulty and force the core into fresh new growth. It burns a bunch of calories, too. I hate planks but they work.


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