Twisting Crunch (Straight Arms)
Twisting Crunch (Straight Arms) Exercise Description
The Twisting Crunch (Straight Arms) is a floor-based trunk flexion with rotation that targets the rectus abdominis and the external/internal obliques. Keeping the arms straight increases the lever length, raising the demand on the anterior core without loading the neck or pulling on the head. The movement is small and controlled: the shoulder blades lift from the floor while the ribcage rotates, with the pelvis held steady in a light posterior tilt. Focus on bracing the abdominal wall, keeping the neck neutral, and rotating from the thoracic spine rather than yanking through the arms. Exhaling as you curl helps maintain ribcage position and abdominal engagement while you move.
- Muscle Groups: Abs, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques
- Assisting Muscles: Rectus Abdominis
- Stabilizing Muscles: Multifidus, Quadratus Lumborum, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core
- Body Surface: Side
- Body Symmetry: Other
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Single-joint
- Muscle Location: Deep Side Abs, Side Abs
- Movement Direction: Rotational
- Muscle Position: Lateral
- Gender: Male
How To Do The Twisting Crunch (Straight Arms) Exercise
‘- Lie supine with knees bent, feet flat hip-width apart. Reach both arms straight toward the ceiling above your shoulders; palms face each other.
– Set your ribs down and lightly posteriorly tilt the pelvis so your low back contacts the floor. Gently brace your abdomen.
– Keep the neck neutral (gaze between knees) and shoulders away from ears.
– Exhale and perform a small crunch: lift head and shoulder blades while rotating your ribcage to the right. Keep arms straight and aligned with your sternum as you “reach” toward the outside of the right thigh.
– Pause briefly, maintaining the abdominal brace and pelvic position.
– Inhale and lower your shoulders and head to the mat with control.
– Repeat to the left, alternating sides.
– Move slowly; the range is modest—just enough for the shoulder blades to clear the floor.
– Keep rotation through the upper trunk; avoid pulling with the arms, jutting the chin, flaring the ribs, or arching the low back.
– Keep feet relaxed on the floor; do not anchor or swing the legs for momentum.
Twisting Crunch (Straight Arms) Tips
‘- Before you start, set your ribs down and lightly posteriorly tilt your pelvis so your low back contacts the floor.
– Gently brace your abdomen and maintain that brace as you move.
– Reach both arms straight toward the ceiling above your shoulders, palms facing each other, and keep them aligned with your sternum.
– Keep your neck neutral with your gaze between your knees and your shoulders away from your ears.
– As you exhale, perform a small crunch, lifting your head and shoulder blades while rotating your ribcage to one side.
– Keep the movement modest—only lift until your shoulder blades just clear the floor.
– Focus on rotating through the upper trunk (thoracic spine) rather than pulling with your arms.
– Keep your pelvis steady in a light posterior tilt, avoiding rib flare or arching in the low back.
– Inhale as you lower your shoulders and head back to the mat with control.
– Keep your feet relaxed on the floor; do not anchor or swing your legs for momentum.
– Alternate sides, reaching your straight arms toward the outside of the thigh on each rep.
Twisting Crunch (Straight Arms) Beginner Introduction
The Twisting Crunch (Straight Arms) is a controlled floor exercise that blends a small curl of the upper body with a gentle turn through the ribcage. It emphasizes the abs and side abs while the arms stay long, which lengthens the lever and increases the challenge for the front of the core. Because the hands stay away from the head, tension around the neck is minimized and the movement centers on the midsection rather than pulling with the arms.
During each repetition, the upper back rises slightly from the mat as the ribs rotate toward one thigh and the hips remain quietly anchored with a subtle tuck, so the lower back stays in contact with the floor. The motion alternates from side to side, with rotation driven from the upper spine instead of swinging the legs. Breathing out during the lift phase supports abdominal tension and a stable ribcage, while a slow return to the floor encourages precision, a modest range, and strong mind‑muscle awareness in the core.