Weighted Russian Twists: Sit on the floor with your knees bent, holding a dumbbell or medicine ball.
Weighted Plank: Perform a plank while wearing a weighted vest or placing a weight plate on your back to increase the intensity and strengthen your core.
Dumbbell Leg Raise: Lie on your back and hold a dumbbell between your feet.
Cable Crunches: Kneel in front of a cable machine, hold the rope attachment behind your head, and crunch downwards, pulling against the resistance.
Medicine Ball V-Ups: Hold a medicine ball with both hands and lie on your back.
Weighted Bicycle Crunches: Perform bicycle crunches holding a small plate or dumbbell across your chest to add resistance to the twist motion.
Dumbbell Side Bend: Stand with your feet shoulder-width apart and hold a dumbbell in one hand.
Kettlebell Windmills: Stand with your feet wide apart, holding a kettlebell in one hand. Turn your feet at a slight angle, lift the kettlebell overhead