Stability ball leg extension crunch. A rarely seen combination of an isolation pull exercise (the crunch) and an isolation push exercise (the leg extension). Main muscles worked: Quadriceps, Rectus Abdominis, Internal Oblique, External Oblique, Tensor Fasciae Latae, Iliopsoas, Pectineus, Sartorius, Adductor Longus, and Adductor Brevis.
Hanging straight leg and hip raise. A major compound exercise! Visit site to learn why this is one of the best exercises for core strength! Target muscle: Rectus Abdominis. Synergists: Iliopsoas, Tensor Fasciae Latae, Sartorius, Pectineus, Adductor Longus, Adductor Brevis, Internal and External Obliques, and Quadriceps.