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Feet in Straps: Frog

Classical Repertoire Beginner Supine Core IntegrationHip & Posterior Chain

Feet-in-straps frog press working the adductors and inner thighs while the pelvis stays anchored and the spine stays long.

Feet in Straps: Frog — Reformer schematicSide-view Reformer schematic for Feet in Straps: Frog. The drawing labels: open knees. Teal arrows show the direction of movement. Dashed lines are the straps, running to the pulley riser at the head end. Setup: Reformer, 2 medium springs, Footbar Medium, Headrest Medium.open knees
  • Body
  • Reformer
  • Strap
  • Movement
Schematic — Feet in Straps: Frog Reformer · 2 medium springs · Footbar Medium · Headrest Medium
AI-generated illustration: an instructor performing Feet in Straps: Frog, on a Reformer, springs set to 2 medium springs, footbar Medium, headrest Medium. Illustrative only — the schematic diagram above shows the movement.
AI-generated illustration Illustrative only — the schematic above is the reference drawing.

Teaching Precautions

Common precautions, not exhaustive. Screen every client and refer when in doubt.

  • Hip Impingement: Deep hip flexion with the knees wide can aggravate impingement or labral irritation. Use a shallower frog position and reduce the range.
  • Pregnancy: Supine work after the first trimester can compress the vena cava; elevate the head and shoulders or use a side-lying alternative.

Apparatus Setup

Reformer

Spring Tension 2 medium springs
Footbar Position Medium What this means →
Headrest Medium

Target Muscles

Transverse Abdominis (Primary)Quadriceps (Secondary)Gluteus Medius (Secondary)Adductors (Primary)

Setup Instructions

Lie supine on the carriage with feet in the long straps, knees bent wide into a frog position with the heels together and toes turned out.

Execution Instructions

  1. Exhale to press the legs out to a long V, inhale to bend the knees back into frog.
  2. Keep the heels together and the lower back anchored as the legs work.

Teaching Cues

Breath

"Exhale as the legs press to a long V, inhale as the knees bend back to frog."

Alignment

"Keep the heels together and the toes softly turned out."

Form

"Anchor the lower back — the pelvis does not rock with the legs."

Modifications & Progressions

Shallower Narrower Frog (Regression)

Reduce the depth of the frog bend and the width of the V to lessen hip flexion.

Wider Shallower Frog (Injury Modification)

Keep the knees wider and shallower and limit the press range; stop if there is pinching in the front of the hip.

Single-Leg Frog (Progression)

Press one leg at a time with the other knee held in frog, halving the load and exposing any difference between sides.

Related Exercises

The rest of the Feet in Straps family.

Related Guides