Seated Windshield Wiper Bodyweight

The seated windshield wiper is a bodyweight core exercise performed from a reclined seated position, sweeping both legs side to side like the blades of a car's windshield wiper. It builds strength and control in the obliques and lower rectus abdominis while also demanding hip flexor endurance and hip mobility. Because the legs move as a unit while the torso stays braced, the exercise trains rotational core control without any added equipment. It suits intermediate lifters who have already built a base of straight-line ab strength.

Muscles Targeted

• Primary: Obliques, rectus abdominis (lower)
• Secondary: Hip flexors
• Tertiary: Inner and outer thighs (adductors/abductors), lower back stabilizers

Starting Position

Sit on the floor with knees bent and feet flat, then lean your torso back to roughly a 45-degree angle while keeping your spine straight, not rounded. Plant your hands on the floor behind your hips or extend your arms out to the sides for balance. Lift both feet off the floor and draw your knees toward your chest to establish the working position.

Execution Steps

1. Brace your core and lean back to the 45-degree torso angle with feet lifted and knees bent
2. Lower both knees together toward one side, rotating from the hips while keeping the shoulders anchored
3. Stop just short of the floor on that side, keeping tension in the obliques rather than resting the legs down
4. Draw the knees back through center using the core, not momentum
5. Continue the sweep to the opposite side, mirroring the movement
6. Repeat, alternating sides for the desired number of reps

Form Cues

• Keep the shoulders and upper back anchored - only the hips and legs should rotate
• Move the knees together as a single unit rather than letting them separate
• Keep the lower back flat if reclined further, avoiding an excessive arch
• Control the descent on each side; don't let gravity snap the legs down
• Exhale as the legs sweep back through the center, where the obliques work hardest

Common Mistakes

• Letting the shoulders rotate with the legs: this turns the movement into a full-body twist rather than an isolated hip rotation. Keep the upper back stable.
• Touching the legs fully to the floor and resting: this removes tension between reps. Stop just above the floor and reverse the movement.
• Rounding the lower back excessively at the start: this can strain the spine under load. Keep a neutral, braced spine throughout.
• Using momentum to fling the legs side to side: fast, uncontrolled reps reduce oblique engagement and increase injury risk. Slow the tempo.
• Keeping the knees too straight for your current strength level: fully extended legs increase the lever arm dramatically. Bend the knees until you build sufficient strength.

Variations

• Bent-knee windshield wiper (regression): keeping the knees bent throughout reduces the resistance lever, suited to beginners
• Straight-leg windshield wiper: extending the legs fully increases the difficulty substantially
• Hanging windshield wiper: performed from a pull-up bar, adds grip and lat demand along with core work
• Medicine ball windshield wiper: holding a medicine ball between the feet adds resistance
• Feet-improved windshield wiper: feet rest on a bench, changing the use and core recruitment

Tips for Progression

• Progress from bent-knee to straight-leg versions as core strength improves
• Increase the range of motion gradually, working toward tapping the floor on each side
• Add reps per set before adding resistance
• Slow the tempo on both the lowering and returning phases to increase time under tension

Training Notes

Include the seated windshield wiper 2-3 times per week as part of a core-focused block, performing 8-12 reps per side for 2-3 sets. Rest 30-45 seconds between sets. It pairs well with anti-extension exercises like planks to give the core both rotational and static training stimulus.