Your core muscles affect everything you do. Ask any woman who has had a C-section or a man who has had a hernia operation and they will tell you how not being able to use their ab muscles made it very difficult … Read
Best abdominal core workouts by Darebee & NeilaRay for stronger abs, allowing you to implement much more variety than your traditional sit-up. Boxer abs aren't only a great way to mix up your workout, but is the best way to build up those abs!
Advanced Ab Challenge
Best ab exercises to get a six-pack — Flutter kick