We chatted with a trainer to learn the five best core moves to sculpt a lean waistline in just 30 days. The best part ... on the rectus abdominis (the six-pack muscle) and not the deeper layers ...
We chatted with a trainer to learn the five best core moves to sculpt a lean waistline in just 30 days. The best part? This roundup doesn't involve classic crunches! "Traditional crunches focus on the ...