Knee Touch Crunch

Knee Touch Crunch Exercise Description

The knee touch crunch is a bodyweight abdominal exercise that emphasizes controlled trunk flexion. Its primary target is the rectus abdominis, with the external/internal obliques and transverse abdominis assisting in stabilization. You’ll lift the head and shoulder blades while bringing the rib cage toward the pelvis, reaching forward to lightly touch the knees at the top. The focus is on a small, precise range of motion driven by the abdominals, not by swinging the arms or pulling the neck. Maintaining a gentle posterior pelvic tilt and a neutral neck helps minimize hip flexor dominance and keeps the lumbar spine supported.

Muscle Groups: Abs, Core, Waist
Target Muscles: Rectus Abdominis
Assisting Muscles: External Obliques
Stabilizing Muscles: Internal Obliques, Transversus Abdominis
Body Area: Upper Body
Body Parts: Core, Torso
Body Surface: Front
Body Symmetry: Other
Equipment: Bodyweight
Exercise Patterns: Other
Exercise Type: Strength
Functional Grouping: Trunk Flexors
Joint Involvement: Single-joint
Muscle Location: Stomach
Movement Direction: Other
Muscle Position: Anterior
Gender: Female

How To Do The Knee Touch Crunch Exercise

‘- Lie supine with knees bent ~90°, feet flat hip-width apart, arms extended toward your knees.
– Gently posteriorly tilt the pelvis so the low back lightly contacts the floor; brace the abdominal wall.
– Set the neck neutral: chin slightly tucked, eyes looking up (not at your knees), shoulders down.
– Inhale to prepare; keep ribs stacked over pelvis.
– Exhale and draw the ribs down as you lift the head and shoulder blades off the floor.
– Reach fingertips forward to lightly touch the tops of the knees; movement comes from trunk flexion.
– Keep low back in contact with the floor; pelvis stays stable without thrusting the ribs.
– Pause briefly with the scapulae clear of the floor, keeping the neck long and jaw relaxed.
– Inhale and slowly lower the shoulder blades back to the floor with control, maintaining your pelvic position.
– Common checks: do not yank the head, do not lead by flinging the arms, and avoid holding your breath.

Knee Touch Crunch Tips

‘- Before lifting, gently posteriorly tilt your pelvis so your low back lightly contacts the floor.
– Keep your arms extended toward your knees and reach forward only enough to lightly touch the tops of the knees.
– Maintain a neutral neck with a slight chin tuck and eyes looking up, not at your knees.
– Keep your shoulders down as you lift so the movement comes from trunk flexion, not from shrugging.
– As you exhale, draw the ribs down toward the pelvis to lift the head and shoulder blades.
– Focus on using the abdominals to curl the trunk instead of swinging the arms or yanking the head.
– Keep the low back in contact with the floor and the pelvis stable without thrusting the ribs.
– Pause briefly with the shoulder blades off the floor, keeping the neck long and the jaw relaxed.
– Inhale as you slowly lower the shoulder blades back to the floor, maintaining your pelvic position.
– Avoid holding your breath; use an inhale to prepare and an exhale as you lift.

Knee Touch Crunch Beginner Introduction

The knee touch crunch is a floor-based abs exercise centered on slow, deliberate movement rather than big, sweeping motions. It mainly trains the abs, with the side abs and deep core working together to steady the body. During each repetition, the head and upper back curl gently away from the ground as the chest travels a little closer to the thighs, and the hands reach forward until the knees are lightly contacted. The motion stays compact and controlled, which helps highlight tension through the midsection instead of relying on swinging the arms or straining the neck.

This crunch style emphasizes support for the lower back and a relaxed, natural neck position. A subtle tuck of the hips allows the back to rest comfortably on the floor, which can lessen excess work from the front of the hips and bring more attention to the core. The movement encourages calm breathing, steady positioning of the pelvis, and a brief hold with the shoulder blades hovering off the surface, creating a focused, precise ab workout.