Bridge - Mountain Climber (Cross Body)
- Target muscle
- Obliques, Rectus Abdominis
- Equipment
- Body weight
- Body part
- Waist
- Type
- Strength
The bridge mountain climber (cross body) is a bodyweight core exercise that primarily targets the obliques and the rectus abdominis. Starting from a high-plank bridge, you drive each knee diagonally toward the opposite elbow, which forces the torso to rotate and lights up the side abs. It builds anti-extension and rotational core strength with no equipment needed.
How to do the Bridge - Mountain Climber (Cross Body)
- 1Set up in a high-plank bridge position with your hands directly under your shoulders and your arms fully extended.
- 2Extend your legs behind you with your feet hip-width apart, forming a straight line from head to heels.
- 3Brace your core and squeeze your glutes so your hips stay level and your back stays flat.
- 4Drive your right knee diagonally across your body toward your left elbow, rotating slightly through your torso.
- 5Pause briefly as your knee reaches across, keeping your shoulders square and your hips low.
- 6Return your right foot to the start position under control without letting your hips sag or pike.
- 7Drive your left knee diagonally toward your right elbow with the same controlled rotation.
- 8Continue alternating sides for the prescribed reps or time, keeping a steady, controlled tempo throughout.
Form tips
- Keep your hips low and level rather than letting them rise — the abs should do the work, not momentum.
- Pull the knee across with your obliques, focusing on the cross-body twist instead of just sliding the foot.
- Maintain a neutral neck by looking at a spot on the floor slightly ahead of your hands.
- Press the floor away to keep your shoulder blades stable and your upper back from collapsing.
- Control both the drive and the return; a slower tempo keeps more tension on the core.
Common mistakes
- Letting the hips pike up toward the ceiling, which shifts the work off the abs and reduces core tension.
- Bouncing through reps with momentum, which removes oblique engagement and turns it into a cardio shuffle.
- Sagging the lower back, which strains the spine because the core isn't braced.
- Letting the hands drift forward of the shoulders, which destabilizes the plank and stresses the wrists.
- Rushing the return so the foot slaps down, losing control and the cross-body twist.
Frequently asked questions
What muscles does the bridge mountain climber (cross body) work?
It primarily works the obliques and the rectus abdominis. The cross-body knee drive adds a rotational element that emphasizes the side abs more than a standard mountain climber.
How is the cross-body version different from a regular mountain climber?
A regular mountain climber drives the knee straight toward the same-side chest, while the cross-body version drives it diagonally toward the opposite elbow. That diagonal path rotates the torso and targets the obliques harder.
Is the bridge mountain climber (cross body) good for beginners?
Yes. It needs no equipment and you control the pace, so beginners can start slow with a few reps per side and build up. Keep the hips low and the movement controlled rather than fast.
How many reps should I do?
A good starting point is 2–3 sets of 10–15 reps per side, or 20–40 seconds of steady alternating reps. Stop the set once your hips start rising or your form breaks down.
Where should I feel this exercise?
You should feel it mainly in your obliques and the front of your abs as you brace the plank and rotate the knee across. If you feel it in your lower back, drop your hips lower and brace harder.
