Building a lean, toned core goes beyond traditional crunches; it's about engaging all core muscles to burn calories and ...

15 reverse crunches, 15 stability-ball crunches, and 24 stability-ball climbers, although my abs are burning and I'm out of breath at the end. It's a struggle holding a plank for even one minute ...

It's necessary for balance, stability ... hold a weight or medicine ball in both hands and twist the torso to one side, then to the other side. While crunches have their place, they are far ...