
Elbow to Knee Side Plank Crunch (left)
- Músculo objetivo
- —
- Equipamiento
- Body weight
- Parte del cuerpo
- Waist
- Tipo
- Strength
The elbow to knee side plank crunch (left) is a bodyweight core exercise that targets the muscles of the waist, especially the obliques along the left side of your trunk. Holding a side plank on your left forearm, you draw your top elbow and top knee together to crunch the side of your core, building lateral stability and rotational strength.
Cómo hacer el Elbow to Knee Side Plank Crunch (left)
- 1Lie on your left side with your left forearm flat on the floor, elbow stacked directly under your left shoulder.
- 2Stack your feet or stagger them slightly, then lift your hips off the floor so your body forms a straight line from head to feet — this is your side plank position.
- 3Extend your right arm overhead and your right leg in line with your body to lengthen the reaching side.
- 4Brace your core and exhale as you draw your right elbow and right knee toward each other in front of your torso, crunching the side of your waist.
- 5Squeeze your obliques at the top while keeping your hips lifted and your supporting shoulder stable.
- 6Inhale and slowly return your right arm and leg to the extended position without letting your hips drop.
- 7Complete all reps on the left side, then lower your hips under control to finish the set.
Consejos de técnica
- Keep your hips lifted and level throughout — your body should hold a straight line, not sag toward the floor.
- Stack your left elbow directly under your shoulder to protect the joint and keep the support strong.
- Move at a controlled tempo and exhale on the crunch so you engage the obliques rather than swinging into the rep.
- Keep your neck long and gaze forward instead of tucking your chin into your chest.
Errores comunes
- Letting the hips drop toward the floor, which removes tension from the obliques and strains the lower back.
- Placing the support elbow ahead of or behind the shoulder, which loads the shoulder joint unevenly.
- Rushing the reps and using momentum, so the core stops doing the work and the crunch loses effect.
- Forgetting to train both sides equally, leaving the right side underworked and creating an imbalance.
Preguntas frecuentes
What muscles does the elbow to knee side plank crunch work?
It mainly works the muscles of the waist, especially the obliques on the supporting (left) side, while the deeper core muscles stabilize your trunk and the supporting shoulder helps hold the plank.
Why does this version say "left"?
The left version is performed lying on your left side with your left forearm on the floor, so the left side of your waist supports and works hardest. Do the right-side version too to train both obliques evenly.
Is the elbow to knee side plank crunch good for beginners?
Yes. It needs no equipment, just your body weight. If a full side plank is too hard, drop your left knee to the floor for support and crunch from there until your core gets stronger.
How many sets and reps should I do?
Aim for 2–3 sets of 8–15 controlled reps per side. Focus on keeping your hips lifted and your form clean rather than chasing high numbers.







