Frog Crunch
Frog Crunch Exercise Description
The frog crunch is a floor-based abdominal exercise that emphasizes controlled spinal flexion while the hips rest in a “butterfly” position (soles of the feet together, knees out). Positioning the legs this way reduces the tendency to anchor through the hip flexors compared with traditional feet-planted variations, helping you focus on curling the rib cage toward the pelvis. The primary mover is the rectus abdominis, with the external and internal obliques assisting in trunk flexion and stabilization; the transverse abdominis contributes to bracing. Expect a small, precise range of motion—lifting the shoulder blades without yanking the neck or driving the movement from the legs. Proper execution prioritizes a light posterior pelvic tilt and a smooth, controlled descent to maintain tension through the midsection and minimize momentum.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: External Obliques, Internal Obliques
- Stabilizing Muscles: 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 Frog Crunch Exercise
‘- Lie supine on a mat. Bring the soles of your feet together near your hips; let your knees fall out comfortably.
– Lightly posteriorly tilt the pelvis so the low back contacts the mat without forceful pressing.
– Cross arms over chest or place fingertips lightly at the sides of your head; keep elbows wide.
– Set a neutral neck with your gaze upward; imagine holding a small orange under your chin.
– Inhale to prepare; brace gently as if tightening a belt around your midsection.
– Exhale and curl the upper trunk: draw the sternum toward the pelvis, lifting shoulder blades off the mat.
– Keep hips relaxed and knees wide; avoid pressing feet or pulling with the legs.
– Pause briefly at the top while maintaining the posterior pelvic tilt.
– Inhale and lower slowly, articulating the spine back to the mat with control.
– Maintain even breathing, smooth tempo, and tension in the abdominals throughout.
– If you feel your neck or hip flexors taking over, reset: widen the elbows, deepen the pelvic tilt, and reduce the range.
Frog Crunch Tips
‘- Bring the soles of your feet together near your hips and let your knees fall out comfortably.
– Lightly posteriorly tilt your pelvis so your low back contacts the mat without forceful pressing.
– Cross your arms over your chest or place fingertips lightly at the sides of your head, keeping your elbows wide.
– Keep a neutral neck with your gaze upward, as if holding a small orange under your chin.
– Inhale to prepare and gently brace your midsection as if tightening a belt.
– As you exhale, curl your upper trunk by drawing your sternum toward your pelvis to lift your shoulder blades off the mat.
– Keep your hips relaxed and knees wide; avoid pressing through your feet or pulling with your legs.
– Pause briefly at the top while maintaining the light posterior pelvic tilt.
– Inhale and lower slowly, articulating your spine back to the mat with control.
– If your neck or hip flexors start taking over, reset by widening your elbows, deepening the pelvic tilt, and reducing your range of motion.
Frog Crunch Beginner Introduction
During the frog crunch, the body is on the ground with the back against a mat and the legs opened so the knees fall outward and the soles of the feet touch. This relaxed leg arrangement lessens help from the hip flexors so the movement centers on drawing the rib cage toward the pelvis. The main effort comes from the abs, with the side abs and deep abs helping bend and steady the trunk. Only a small lift occurs, just enough for the shoulder blades to come away from the floor without strain in the neck or pulling from the legs.
Breath and control form the theme of this exercise. A gentle tuck of the hips, a steady rise and unhurried return to the mat, and consistent tension through the midsection create a precise, compact motion rather than a big swing. Arms may rest across the chest or lightly support the sides of the head, while the gaze stays upward to help the neck stay comfortable. The result is a focused core drill that emphasizes smooth, continuous engagement over momentum.