Oblique Crunches With Straight Leg Lift

Oblique Crunches With Straight Leg Lift Exercise Description

Oblique Crunches with Straight Leg Lift combine a diagonal crunch with a single-leg raise to train trunk flexion and rotation while maintaining pelvic control. The primary drivers are the external and internal obliques and rectus abdominis; the hip flexors of the lifted leg (iliopsoas, rectus femoris) assist the motion, while the transverse abdominis contributes to bracing. The goal is to bring the ribcage toward the pelvis on a diagonal without yanking the neck or allowing the low back to arch. Keeping the lumbar spine gently “imprinted” into the mat helps direct the work to the abdominal wall rather than the lower back and limits unwanted hip motion. Because it uses body weight only, this drill is accessible in most settings and can be adjusted by changing leg height or arm position. Expect a controlled, deliberate movement with smooth breathing and precise rotation from the thoracic spine.

Muscle Groups: Abs, Core, Obliques, Waist
Target Muscles: External Obliques, Internal Obliques, Rectus Abdominis
Assisting Muscles: Iliacus, Psoas Major, Rectus Femoris
Stabilizing Muscles: Transversus Abdominis
Body Area: Upper Body
Body Parts: Core, Torso
Body Surface: Front, Side
Body Symmetry: Unilateral
Equipment: Bodyweight
Exercise Patterns: Other
Exercise Type: Strength
Functional Grouping: Trunk Flexors, Trunk Lateral Flexors, Trunk Rotators
Joint Involvement: Multi-joint
Muscle Location: Deep Side Abs, Side Abs, Stomach
Movement Direction: Other
Muscle Position: Anterior, Lateral
Gender: Male

How To Do The Oblique Crunches With Straight Leg Lift Exercise

‘- Lie supine with legs extended, heels on the floor. Lightly place fingertips at your temples (elbows wide) or cross arms over chest.
– Set the pelvis with a gentle posterior tilt so the lower back contacts the mat; brace the abdominal wall.
– Lift the right leg straight to roughly 30–45 degrees, knee extended, hips level.
– Exhale; curl head and shoulders off the mat, rotating your ribcage toward the raised leg. Lead with the shoulders, not the elbows.
– Keep the chin slightly tucked and gaze toward the ceiling; avoid pulling on the head.
– Maintain lumbar contact with the mat; stop if the low back begins to arch.
– Inhale; lower the shoulders and leg with control to the start position.
– Repeat to the other side: lift the left leg and rotate toward it.
– Move slowly and smoothly; keep both hips stable and level.
– If lumbar contact is lost, reduce the leg height or slightly bend the lifted knee to maintain control.
– Breathe continuously—exhale on the curl/rotation, inhale on the return.

Oblique Crunches With Straight Leg Lift Tips

‘- Set a gentle posterior pelvic tilt so your lower back stays in contact with the mat before you start.
– Lightly place fingertips at your temples with elbows wide, or cross your arms over your chest to avoid pulling on your head.
– Lift the working leg straight to about 30–45 degrees with the knee extended while keeping both hips level.
– As you curl up, exhale and rotate your ribcage toward the raised leg, leading with the shoulders rather than the elbows.
– Keep your chin slightly tucked and your gaze toward the ceiling to avoid yanking the neck.
– Maintain lumbar contact with the mat throughout; stop the range if your low back begins to arch.
– Move slowly and smoothly when lifting and lowering both the shoulders and the leg.
– Keep both hips stable and level during the entire movement.
– If you lose lumbar contact, reduce the leg height or slightly bend the lifted knee to regain control.
– Breathe continuously—exhale on the curl and rotation, inhale on the controlled return.

Oblique Crunches With Straight Leg Lift Beginner Introduction

Oblique Crunches with Straight Leg Lift is a floor-based core exercise that blends an angled crunch with a single-leg raise. It emphasizes controlled bending and twisting through the upper torso while the hips remain steady on the mat. The movement mainly targets the abs and side abs, with support from the hip flexors and the front of the lifted thigh. A gentle, supported feeling through the lower back guides the work into the abdominal area rather than the spine.

The exercise is performed lying on your back with one leg long on the ground and the other raised, while the upper body lifts and turns toward the elevated leg. The neck stays relaxed, with the head lightly supported by the hands or with arms folded across the chest. The motion is unhurried and precise, with a clear sense of direction coming from the ribcage rather than the elbows. Most people breathe out as the torso lifts and rotates, then breathe in while returning. With only bodyweight required, it suits many spaces, and small shifts in leg height or arm position change how demanding it feels.