Strengthen And Balance Your Core

Total body exercises rely on your abs, hips, and back muscles, but when you're unstable you use less weight, which means your muscles don't work as much.
Balance means strength.  There's an extensive network of small stabilizing muscles in your hips, knees, ankles, and core.  Develop these and you develop a stronger foundation for larger muscles, which can generate more strength.
According to a report published in Medicine & Science in Sports Exercise, volunteers who did Pilates twice a week for nine months increased their lean abdominal muscle by 21%.
For a stronger midsection and more power, incorporate classic Pilates moves into your workout twice a week.