Pilates

Reformer Feet-in-Straps Frog

The Reformer Feet-in-Straps Frog is a lying leg press with heels together and knees turned slightly outward. It trains your inner thighs and glutes while you keep your pelvis steady.

  • Beginner
  • Compound
  • Low injury risk
  • Rest 45 sec

How to do it

  1. Lie on your back with your head supported and shoulders clear of the shoulder rests.
  2. Place one foot in each loop, with the straps supported around your arches.
  3. Bring your heels together with knees bent and slightly apart.
  4. Flex your ankles so your toes point back toward your shins.
  5. Press your heels away along an upward diagonal until your legs are nearly straight.
  6. Bend your knees to bring your heels back toward your seat along the same path.

Form cues

  • Keep your tailbone heavy
  • Let your neck stay relaxed
  • Exhale out, inhale back

Common mistakes

  • Lowering the legs too farUse a higher diagonal if your lower back arches or your ribs lift.
  • Forcing a wide turnoutUse a small rotation from your hips so your knees stay aligned with your toes.
  • Letting the springs pull you backSlow the return so the carriage moves smoothly without hitting its stop.

Safety

Unsuitable spring resistance or a slipping foot loop can cause an abrupt carriage movement. Working beyond your controlled range can strain your hips, knees, or lower back.

  • Have trained staff show you safe strap entry and exit before your first attempt.
  • Check that both loops and rope attachments are secure and evenly adjusted.
  • Use the reformer's recommended beginner spring setting; lighter springs are not always easier to control.
  • End the set if a loop shifts or you cannot control the carriage.

If you have ongoing hip, knee, or lower-back pain, ask a physiotherapist about a suitable range before trying this exercise.

Muscles worked

Front
Back

Primary muscles

  • Adductors
  • Glutes

Secondary muscles

  • Hamstrings
  • Hip Flexors

Equipment

  • Pilates Reformer

Sets and reps

Sets
2–3
Target
8–12 reps
Rest
45 sec

Start with a short range and increase it only while your trunk stays still.