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.