5 Biggest Ab Day Mistakes
Make the most of your six-pack sculpting routine by avoiding these common training errors.
3. Arching your back
You’ve heard it so many times that it’s practically beaten into your brain: Maintain a flat or slightly arched back when you train with weights. And while that’s good advice to protect the spine, a flat back means you aren’t contracting your abs actively — though they may be isometrically contracting to keep your core tight. You often see this when guys are doing cable crunches or decline crunches with an arched back. A better way to get the abdominals actively engaged is to round your lower back, which allows the rectus abdominis to shorten. Just watch out for explosive movements when rounding your back.