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Butterfly Stretch

The butterfly stretch is the fundamental seated groin opener: soles of the feet together, knees wide, torso tall or folding gently forward. It targets the adductors and inner-thigh line that squatting, running, and long sitting hours all shorten — two minutes a day pays measurable dividends. Coached by Maddy (NASM-CPT) — these are the exact form cues he gives on every client's first week.

Muscles worked

Inner thighs · adductor longus Inner thighs · gracilis Inner thighs · adductor magnus

Sets & reps by goal

GoalSets × RepsRest
Strength2–3 × 5 slow active knee drops30 s
Muscle3 × 20–30 s hold30 s
Endurance2 × 45–60 s hold30 s

Level — Beginner

Suitable for everyone from day one — intensity is controlled entirely by heel distance and fold depth.

Proper form — 5 cues

  1. Sit tall on your sit bones and bring the soles of your feet together.
  2. Draw the heels toward your hips to a point of mild — not sharp — tension.
  3. Hold the ankles and lengthen your spine upward before anything else.
  4. Let the knees sink toward the floor under their own weight.
  5. To deepen, hinge forward from the hips with a flat back, chest leading.

Breathing: Slow nasal inhales, long sighing exhales — let each exhale settle the knees a little lower.

The 3 mistakes Maddy corrects most

Bouncing the knees up and down. The flapping triggers the stretch reflex, so the adductors tighten defensively instead of releasing. Fix: Hold still and breathe; depth arrives through time under gentle tension, not through pumping.
Rounding the spine to get the head low. The fold happens in the back instead of the hips, so the groin stretch you came for never happens. Fix: Hinge with a proud chest — even five centimetres of flat-back fold beats a full slump.
Yanking the feet in as close as possible. Heels jammed against the body can pinch the knees and force the hips past their comfortable range. Fix: Start with heels a comfortable distance away; slide them closer over weeks as range opens.

Common questions

What is the butterfly stretch good for?

It lengthens the adductor group and the surrounding hip tissue — the muscles that limit how wide your knees track in a squat and how freely your hips move in sport. People who sit for long stretches often find their inner thighs chronically short; this stretch is the most direct, equipment-free answer to that.

Should I do the butterfly stretch before or after training?

Long, deep holds fit best after training or on separate mobility time, when warm tissue releases furthest and any short-term effect on force output does not matter. Before training, keep it brief and gentle — a mobiliser, not a deep stretch — and let dynamic movements do most of the warm-up work.

My knees are nowhere near the floor — is that bad?

Not at all — knee height in this position is set partly by hip anatomy you cannot train. What matters is whether your usable range is improving and whether the position feels less strained over weeks. Support the thighs on cushions, keep the spine tall, and compare yourself only to last month's version of you.

Related exercises

Butterfly Block StretchInner thighs · Inner thighs Hips and Inner Thigh StretchInner thighs · Inner thighs Adductor MachineInner thighs · Inner thighs Block Shoulder StretchRear shoulders · Side shoulders Calf StretchCalves · Calves

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