Legs · Mobility

Butterfly Stretch

The butterfly stretch is a seated hip stretch where you press the soles of your feet together and let your knees fall open. It stretches the inner thigh muscles, the adductors, and gently opens the hips, which makes it a common cool-down stretch and a good addition to a lower-body routine.

Also known as: Seated butterfly stretch, Bound angle pose, Cobbler's pose

Muscle group: Legs
Movement pattern: Mobility
Type: Isolation
Equipment: Mat
Difficulty: Beginner

What muscles does the butterfly stretch work?

Primary movers

Hip adductors

Assisting muscles

Hip flexors
Erector spinae
Gluteus maximus

The adductors on the inner thigh take the main stretch. Dropping the knees outward lengthens them, and the further your feet sit from your body, the gentler the stretch.

The hip flexors, glutes and lower back also stretch a little, especially if you hinge forward from the hips.

Tight hips often make the knees stay high. That is normal, so do not force them down.

Hold the stretch gently and breathe. Stretching should feel like mild tension, never sharp pain.

How to do the butterfly stretch

Setup

1
Sit on the floor with your knees bent and the soles of your feet pressed together.
2
Hold your feet or ankles.
3
Pull your heels in as close as is comfortable.
4
Sit tall on a folded towel if your lower back rounds.

Execution

1
Sit tall and let your knees drop toward the floor.
2
Press your knees down gently with your elbows if you want more stretch.
3
For a deeper stretch, hinge forward from the hips with a flat back.
4
Hold for 20 to 30 seconds while breathing slowly.
5
Sit back up slowly and straighten your legs.

Common butterfly stretch mistakes

Bouncing the knees

It can overstretch the muscles and strain the hips.

The fix: Hold a steady, gentle stretch.

Rounding the back

The stretch moves to the spine instead of the hips.

The fix: Hinge from the hips with a flat back.

Forcing the knees down

It can irritate the knees and hips.

The fix: Let gravity do the work and relax.

Holding your breath

It increases tension.

The fix: Breathe slowly and deeply.

How many sets and reps?

Goal	Sets	Reps	Load	Rest
Flexibility	2–3	20–30 s	Bodyweight, gentle	30 s
Cool-down	1–2	30–45 s	Relaxed hold	As needed
Beginner	2	15–20 s	Feet farther from the body	30 s

Use the butterfly stretch after leg day or on rest days. Tight hips take time, so be consistent and gentle rather than aggressive.

Running the butterfly stretch in your next block? Hercules logs every set, shows last session's numbers before you lift, and suggests when to add weight.

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Frog Stretch

Harder

A deeper adductor stretch on all fours.

Seated Straddle Stretch

Harder

Stretches the adductors and hamstrings together.

Frequently asked questions

What does the butterfly stretch work?

The inner thigh muscles, the adductors, plus the hips.

How long should I hold it?

Hold 20 to 30 seconds for two or three rounds.

Why are my knees so high?

Tight hips are common. Do not force them. Flexibility improves with regular, gentle practice.

Is it safe for the knees?

Usually, if you do not force them down. Stop if you feel knee pain.

Hercules tracks every butterfly stretch you log, shows you last session's numbers before you lift, and flags when your progress stalls.