An workout ball provides instability, forcing your core to work harder. The result? Stronger core.
Stability ball plank. Circle your forearms with your torso still. Turn around. Pinch your shoulder blades and don't slouch.
Train your stomach to resist rotation to blast your abs and obliques while bracing your core and keeping a neutral spine.
Cable handles should be chest-high. Face perpendicular to the cord and bring the handle to your chest.
Farmer's carry is the simplest. It strengthens your core and endurance. It even strengthens upper traps and forearms.
Go forward with a heavy dumbbell or kettlebell in one hand, chest high, and shoulder blades clenched.
This boosts core power. Your core transfers force from the ground to your torso.
Chest-high cable machine. Turn your shoulders and hips simultaneously in a split stance with straight arms.
Keep your feet moving to avoid back strain. Instead, twist your hips and feet to avoid twisting your lower spine.