98, 99, 100…you mutter through pursed lips, before collapsing flat on your back on the gym floor. Your core crunched to oblivion, your hip flexors probably firing on all cylinders and your neck a little sore, you’ll be back again tomorrow for one hundred more.
If that’s ever been you, you’re not alone. Less than a decade ago, many mainstream core workouts focused almost exclusively on crunch-style moves designed to target the rectus abdominis (also known as your six-pack muscles).
