Knee Touch Crunch
Knee Touch Crunch Exercise Description
The Knee Touch Crunch is a bodyweight core exercise that combines a basic crunch with a cross-body knee drive. It primarily targets the rectus abdominis and the external and internal obliques, with assistance from the hip flexors during the knee lift. The movement involves controlled thoracic spinal flexion with slight trunk rotation while one hip flexes. Emphasis is on lifting the shoulder blades off the floor by drawing the ribcage toward the pelvis—not by pulling on the neck. Keeping the elbows wide and the lower back comfortably in contact with the floor helps direct the work to the abdominal wall and promotes efficient, well-controlled reps.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: External Obliques, Internal Obliques
- Stabilizing Muscles: Multifidus, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors
- Joint Involvement: Multi-joint
- Muscle Location: Stomach
- Movement Direction: Other
- Muscle Position: Anterior
- Gender: Male
How To Do The Knee Touch Crunch Exercise
‘- Lie on your back with knees bent, feet flat, hip-width apart. Lightly place fingertips to the sides of your head; elbows stay wide.
– Set your ribcage down and gently brace your abdomen. Keep a small, comfortable space between chin and chest.
– Exhale, lift your head and shoulder blades off the floor by curling the upper trunk (ribs toward pelvis).
– Simultaneously drive the right knee toward your chest while rotating your torso so the left shoulder moves toward the right knee. Think “chest to knee,” not “elbow to knee.”
– Keep the opposite foot flat and pelvis level; avoid yanking the head or collapsing the elbows inward.
– Inhale, lower your shoulder blades and right foot to the start with control.
– Repeat to the other side, bringing the left knee up as the right shoulder moves toward it. Alternate sides smoothly.
– Maintain a light abdominal brace and gentle contact of the lower back with the floor throughout.
– Move within a pain-free range; stop the curl once the shoulder blades clear the floor and the abs stay engaged.
Knee Touch Crunch Tips
‘- Keep your elbows wide and fingertips only lightly touching your head to avoid pulling on your neck.
– Focus on curling your ribcage toward your pelvis to lift your shoulder blades, rather than pulling with your neck.
– Maintain a small, comfortable space between your chin and chest as you crunch.
– Keep your lower back in gentle contact with the floor to direct the work to your abdominals.
– Think “chest to knee” instead of “elbow to knee” when you rotate toward the rising leg.
– Keep the opposite foot flat on the floor and your pelvis level as you drive one knee up.
– Use a light abdominal brace throughout the movement for controlled reps.
– Exhale as you curl up and drive the knee, then inhale as you lower with control.
– Stop the curl once your shoulder blades clear the floor while your abs stay engaged.
Knee Touch Crunch Beginner Introduction
The Knee Touch Crunch is a bodyweight core movement that blends a classic curl of the upper body with a diagonal knee lift toward the opposite side. The pattern links a gentle rise of the head, neck, and shoulders with a small twist through the midsection, so the chest approaches the lifted knee rather than the elbow reaching across. One leg drives upward while the other remains grounded, creating a coordinated, alternating rhythm from side to side.
This exercise centers on the abs and side abs, with help from the muscles at the front of the hips during each knee lift. Attention stays on smooth, deliberate motion rather than momentum, so the front of the torso handles most of the effort instead of the neck. A comfortable connection between the lower back and the floor supports the movement, while wide elbows encourage the upper body to curl from the ribs rather than from pulling on the head. The result is a controlled, cross-body core drill that highlights stability, alignment, and precise repetition.