The medicine ball diagonal chop is a standing core exercise in which a medicine ball is driven diagonally across the body, from high to low or low to high, to train rotational strength and control through the trunk. It primarily targets the obliques and rectus abdominis, which work to initiate and control the twisting motion, while the shoulders and hips assist in transferring force through the movement. The diagonal chop pattern closely resembles the trunk rotation used in throwing, swinging, and other rotational sports actions, making it a useful accessory for athletes as well as a general core-strengthening exercise.
Muscles Targeted
- Primary: Obliques, rectus abdominis
- Secondary: Transverse abdominis, anterior deltoids
- Tertiary: Hip rotators, forearms (grip)
Starting Position
Stand with your feet shoulder-width apart, holding a medicine ball with both hands positioned near the outside of one shoulder, slightly behind your head. Bend your knees slightly and rotate your torso toward the side where the ball starts, loading the obliques on that side.
Execution Steps
- Brace your core and begin rotating your torso toward the opposite hip
- Drive the medicine ball diagonally down and across your body, following the rotation of your trunk
- Pivot your rear foot as you rotate, allowing your hips to follow the direction of the chop
- Lower the ball toward the outside of the opposite hip, keeping your arms extended with a slight bend at the elbows
- Reverse the movement by rotating back to the starting position, controlling the ball back up to the starting shoulder
- Complete all reps on one side, then switch your stance and repeat on the other side
Form Cues
- Initiate with the core, not the arms: The obliques and abdominals should drive the rotation
- Keep the ball close to the body: Chopping too far away reduces control and core engagement
- Pivot the back foot: Allowing the rear foot to rotate lets the hips move naturally with the trunk
- Maintain a slight knee bend throughout: A stable lower body allows force to transfer efficiently through the core
- Control both directions of the chop: The return to the starting position should be as deliberate as the chop itself
Common Mistakes
- Rotating only the arms: Chopping with the arms instead of the trunk removes most of the core stimulus
- Using a ball that is too heavy: Excess weight forces momentum-driven, uncontrolled reps and increases lower-back stress
- Not pivoting the rear foot: A fixed back foot restricts hip rotation and can strain the knee
- Moving too quickly: Fast, jerky chops sacrifice range of motion and control for speed
- Rounding the lower back: Losing a neutral spine during the chop increases injury risk
Variations
- Kneeling medicine ball diagonal chop: Removes leg drive to isolate core rotation further
- Medicine ball diagonal high-to-low chop: Starts overhead and emphasizes the top-down rotational pattern
- Standing chop with resistance band: A band anchored to the side provides constant tension instead of gravity-based resistance
- Cable diagonal chop: A cable machine allows precise adjustment of resistance angle and height
Tips for Progression
- Increase the medicine ball weight gradually as control through the full rotation improves
- Slow the tempo, particularly the eccentric return, to increase time under tension
- Increase the range of motion from a partial chop to a full high-to-low or low-to-high arc
- Add a short pause at the end range of rotation to build control at end-range positions
Training Notes
Perform the medicine ball diagonal chop 2-3 times per week as part of a core-focused warm-up or accessory block, typically for 10-12 reps per side across 2-3 sets with 30-60 seconds of rest between sets. It pairs well with anti-rotation exercises like planks and Pallof presses to build well-rounded core control.