There's a lot of confusion about what is your core and what exercises stregnthen the core. Your core isn't your six-pack. It's the transverse abdominis, much deeper.

Core exercises and six-pack workouts are two different ballgames. Core moves? They're like back pain bodyguards. But those six-pack crunches? They might throw your back out of whack, causing bulging discs, degenerative disc disease and discomfort.

Bottom line: Planks are a win, sit-ups and crunches, not so much.

Now, here's the deal – a core-targeting exercise that packs a punch in just 3 reps. I'm challenging you to give it a go for a solid week. Tell us how it goes – we're all ears!

Now, I dare you to take on this challenge for a week – 7 days of giving it your all. And don't leave us hanging, let us know your results.