The half kneeling windmill is a loaded core rotation drill performed on one knee with a kettlebell held overhead that trains the obliques and shoulder stabilisers as the torso hinges and turns. Kneeling on the bell-side knee takes the hamstring stretch of the standing windmill out of the picture, so the range is limited by the thoracic spine and the hip of the front leg rather than by flexibility, and the shoulder has to hold a fixed overhead position while everything below it moves. Coaches use it in warm-ups and as a core accessory after pressing.
What Muscles Does the Half Kneeling Windmill Work?
- Primary: External and internal obliques
- Secondary: Deltoid and rotator cuff (overhead arm), gluteus medius (front leg)
- Tertiary: Erector spinae, latissimus dorsi, quadratus lumborum
How Do You Set Up for the Half Kneeling Windmill?
Kneel on a mat with your right knee down and your left foot planted in front, shin vertical, then walk the left foot out so it sits slightly wider than your hip. Press a light kettlebell overhead with your right hand, wrist stacked over your shoulder and elbow locked. Let your left arm hang inside your left thigh. Squeeze the right glute so the hips face forward and turn your eyes up to the bell.
How Do You Perform the Half Kneeling Windmill?
- Lock the overhead arm and fix your eyes on the kettlebell, hips square and the down-knee glute tight.
- Push your right hip back and hinge sideways, sliding your left hand down the inside of your left shin toward the floor.
- Reach the bottom when your left fingertips touch the mat, or the floor, with the bell still stacked straight over your shoulder.
- Pause for one second at the bottom, chest turned up toward the bell and both hips still.
- Drive the right hip forward and unwind the torso to return upright, keeping the elbow locked the whole way.
- Finish tall with the bell overhead, eyes on it and the left arm hanging inside the thigh, ready for the next rep.
What Are the Key Form Cues?
- Keep the bell over the shoulder: think of a plumb line from the kettlebell through your wrist and shoulder for the whole rep.
- Push the hip back, do not bend to the side: the down-side hip leads the movement so the torso hinges and rotates rather than folding.
- Keep your eyes on the bell so the shoulder stays packed.
- Screw the front foot into the floor on the way up to drive the return from the hip.
- Reach the bottom hand along the shin so the range grows one inch at a time.
What Are the Most Common Mistakes?
- Going too heavy: the elbow bends and the bell drifts forward as the torso hinges, so start with a light kettlebell you can lock out for the whole set.
- Letting the bell tilt off the shoulder line: the shoulder loads at an angle it cannot stabilise and the rep turns into a lean, so stop the descent where the arm still stacks.
- Bending at the waist instead of pushing the hip back: the lumbar spine flexes sideways under an overhead load, so start every rep from the hip.
- Looking at the floor: the neck drops, the torso stops rotating and the shoulder loses its packed position, so keep your eyes on the bell.
- Letting the front knee cave inward: the front hip rolls in and the pelvis twists out of line, so drive the front knee out over the foot.
What Are the Best Half Kneeling Windmill Variations?
- Tall kneeling bodyweight windmill: no load and both knees down, the regression for learning the hinge and rotation.
- Standing kettlebell windmill: the full version on two feet, with the hamstring stretch back in the movement.
- Half kneeling windmill with the bottom hand loaded: the kettlebell held low in the bottom hand, shifting the work off the shoulder.
- Half kneeling windmill on the other knee: the bell above the front-leg side, a different hip doing the work.
- Half kneeling dumbbell windmill: a dumbbell in place of the kettlebell, easier to balance.
How Do You Progress the Half Kneeling Windmill?
- Move up one kettlebell size once you complete every set with the elbow locked and the fingertips touching the floor.
- Add 1 rep per side each week, working from 5 up to 8.
- Add one set per session, up to 3 per side, before adding load again.
- Add a two-second pause at the bottom, or reach past the shin to the floor, before increasing weight.
How Should You Program the Half Kneeling Windmill?
Program the half kneeling windmill in the warm-up before overhead pressing, or as a core accessory after your mainkettlebellwork. Use it two or three times per week for 2 to 3 sets of 5 to 8 reps per side with 45 to 60 seconds of rest between sides. Pair it with a half kneeling press so the shoulder both moves and stabilises from the same base in one session.