@levi.bell54: Your core is a very complex system. It includes front abs, lateral obliques, lower back and many other small muscles. Doing exercises that active all those at the same time and require real life movements that don’t just push it to be mobile but strong in mobile situations are important. Weighted abs with the weight in between your legs requires your inner thighs to activate with your core to lock that weight in as you do your pull-ups. Then weighted landmine lateral rotations actives your lateral oblique in motion. And lastly back extension helps bullet proof the back to help keep it strong and helps protects it from life accidents