FITBODY Exercise Library · Stretching
90/90 Hip Stretch
The 90/90 hip stretch is the one position that opens both hips at once, one rotating out and one rotating in, and it is the single most useful thing I know for hips that have gotten stiff from sitting.
What Is the 90/90 Hip Stretch?
The 90/90 hip stretch is a seated position stretch where both knees are bent to 90 degrees, one leg in front of you and one out to the side. The name is really just a description of how you sit.
What makes it different from every other hip stretch is that it works both directions of hip rotation at the same time. Your front leg sits in external rotation, which stretches the glutes and the deep rotators. Your back leg sits in internal rotation, which almost nothing else in a normal workout addresses. Pigeon pose, figure 4, and most of the hip stretches women already know only open the hip one way. This one covers both, and it will show you very quickly which side is tighter.
How to Do the 90/90 Hip Stretch
Sit on something. A folded blanket, a yoga block, even a couch cushion under your hips changes this stretch completely for most women. When you sit flat on the floor with tight hips, your pelvis tips backward and your lower back rounds before your hips get anything at all. Lift your hips a few inches and suddenly you can sit tall and the stretch goes where it is supposed to. I have women start elevated far more often than not, and there is nothing wrong with staying there!
What Muscles Does the 90/90 Stretch Work?
The 90/90 stretches two different sets of muscles at once, which is exactly why it feels so different from a standard hip stretch. On the front leg, the external rotation lengthens the gluteus maximus, gluteus medius, and the deep external rotators including the piriformis. On the back leg, the internal rotation lengthens the hip flexors, the tensor fascia latae, and the adductors.
See the full breakdown
- Gluteus maximus: the largest glute muscle, lengthened as the front hip rotates outward and you hinge forward over it.
- Gluteus medius and minimus: the outer hip muscles, stretched through the front leg position and often the source of that deep ache on the outside of the hip.
- Piriformis and deep external rotators: the small muscles underneath the glutes that most stretching never reaches. This is the position that gets to them.
- Hip flexors and quadriceps: lengthened on the back leg as that hip rotates inward and extends.
- Tensor fascia latae: stretched on the back leg. If you sit a lot, this one is usually short and it contributes to that tight band down the outside of the thigh.
- Adductors: the inner thigh muscles, working on both sides to control the position.
Why Hip Rotation Matters More After 40
Hip flexibility declines measurably with age, and it declines faster in women. A study of 436 adults aged 55 to 86 found hip flexion range dropping about 6 degrees per decade in men and 7 degrees per decade in women. Hip rotation range specifically has also been shown to reduce with age, and typical values sit around 38 degrees of external rotation and 30 degrees of internal rotation in adults.
Here is why that matters practically. Your hips need rotation to squat, to walk with a normal stride, to get off the floor, and to turn without your lower back doing the twisting for them. When hip rotation goes, the lumbar spine usually picks up the slack, and that is a common thread in the low back complaints I hear from clients. The 90/90 is the most direct way I know to train rotation in both directions, and it costs you 2 minutes.
It pairs naturally with the Cossack squat for loaded lateral hip work and with a hip flexor stretch if the front of your hips is the tighter end.
How Long to Hold It
This is not an exercise you push hard. It responds to frequency and patience far more than to intensity, so short daily doses beat one heroic session per week.
| Goal | Sets | Hold per side |
|---|---|---|
| Daily hip mobility | 1 to 2 | 30 to 60 seconds |
| Working on a restricted hip | 2 to 3 | 60 to 90 seconds |
| Dynamic warm up, 90/90 switches | 2 | 8 to 10 switches |
Do it daily or at least 4 to 5 times per week for the best results. Save the long static holds for after training or as a standalone session, since prolonged static stretching immediately before heavy lifting can blunt strength output. Use the dynamic 90/90 switches instead if you want it in your warm up.
Variations and Modifications
Elevated 90/90
Sit on a folded blanket, yoga block, or cushion so your hips are a few inches above the floor. This reduces the hip flexion demand and lets you sit upright instead of collapsing backward. This is where most women should start, and staying here for months is perfectly fine.
Supported 90/90
Place both hands on the floor behind you and lean back slightly. This takes load off the hips and lets you hold the position while your range builds. Use it if sitting upright unsupported is not available yet.
90/90 Hip Switch
Instead of holding, rotate your knees from one side to the other, letting your feet stay planted while your hips do the turning. This is the dynamic version and it works beautifully in a warm up. Aim for 8 to 10 slow, controlled switches.
90/90 with Forward Fold
From the upright position, walk your hands forward and lower your chest toward your front shin. This deepens the stretch through the front glute considerably. Only add it once you can sit tall comfortably with a flat back.
Common Mistakes to Avoid
- Rounding your lower back to get lower. If your spine rounds, the stretch has moved from your hips into your lumbar spine and you have lost the point of it. Sit up on something and hinge from the hips instead.
- Forcing the back knee down. The back knee reaching the floor is a result of available internal rotation, not a target to chase. Pushing it down loads the knee joint rather than the hip.
- Ignoring the back leg entirely. Most women only feel the front hip and stop paying attention to the rest. The back leg internal rotation is the part almost nothing else in your week addresses, so keep that hip actively pressing toward the floor.
- Pushing into knee pain. Hip stretch, yes. Knee pain, no. This position puts real rotational demand through both knees, so if you feel pinching or pain in the joint, back out, open the angles wider than 90 degrees, and elevate your hips.
90/90 Hip Stretch FAQs
What is the 90/90 hip stretch?
The 90/90 hip stretch is a seated stretch performed with both knees bent to 90 degrees, one leg in front of your body and one out to the side. The name simply describes the position. What makes it unique is that it stretches both directions of hip rotation at the same time, with the front leg in external rotation and the back leg in internal rotation. Most familiar hip stretches like pigeon pose and figure 4 only open the hip one way, which is why the 90/90 tends to feel harder and more revealing than women expect.
What muscles does the 90/90 stretch work?
On the front leg, the external rotation lengthens the gluteus maximus, gluteus medius, and the deep external rotators including the piriformis. On the back leg, the internal rotation lengthens the hip flexors, tensor fascia latae, quadriceps, and adductors. Your core works quietly throughout to keep your torso upright. That combination means one position covers muscles that would normally take three or four separate stretches to reach.
How long should you hold the 90/90 stretch?
Thirty to sixty seconds per side is a solid target for general hip mobility, and 60 to 90 seconds if you are working on a genuinely restricted hip. Frequency matters more than duration here, so doing it daily or 4 to 5 times a week will move your range far faster than one long session. Save the longer static holds for after training or as a standalone session, since prolonged static stretching right before heavy lifting can temporarily reduce strength output. Use the dynamic 90/90 switches in your warm up instead.
Why does my back knee not touch the floor?
Because your hip internal rotation range does not currently allow it, and that is completely normal. Internal rotation is the direction almost nothing in daily life or a standard workout trains, so it is usually the more restricted of the two. Do not press the knee down with your hand, since that loads the knee joint rather than the hip. Elevate your hips on a cushion, sit tall, and let the range improve gradually. Most women see meaningful change within a few weeks of consistent work.
Is the 90/90 stretch bad for your knees?
It is not inherently bad, but it does place real rotational demand through both knee joints, so form matters. You should feel this stretch in your hips, not in your knees. If you feel pinching, sharp pain, or discomfort inside the knee joint, open both angles wider than 90 degrees, elevate your hips on a cushion or block, and reduce how far you hinge forward. Never force the back knee toward the floor. If knee pain persists in this position, skip it and use a figure 4 or supine hip stretch instead, and check with your doctor or physical therapist.
Is the 90/90 hip stretch good for women over 40?
Yes, and it is one of the most useful stretches I program for women in this stage. Hip flexibility declines measurably with age and research shows it declines slightly faster in women, with hip flexion range dropping around 7 degrees per decade. Hip rotation in particular is what lets you squat, walk with a full stride, and turn without your lower back doing the work instead. The 90/90 trains both directions of rotation in a couple of minutes, needs no equipment, and scales easily by sitting on a cushion. Start elevated, hold 30 to 60 seconds per side, and do it most days.
References
- Stathokostas, Liza, et al. “Flexibility of Older Adults Aged 55 to 86 Years and the Influence of Physical Activity.” Journal of Aging Research, vol. 2013, article 743843, doi.org/10.1155/2013/743843. Across 436 adults, hip flexion declined an average of 6 degrees per decade in men and 7 degrees per decade in women.
- “Clinical Evaluation of Hip Joint Rotation Range of Motion in Adults.” PubMed, 2012, PMID 22227606, pubmed.ncbi.nlm.nih.gov/22227606. Found hip rotation range of motion reduced significantly with age, with mean values of approximately 38 degrees external rotation and 30 degrees internal rotation.
- Behm, David G., and Anis Chaouachi. “A Review of the Acute Effects of Static and Dynamic Stretching on Performance.” European Journal of Applied Physiology, vol. 111, no. 11, 2011, pp. 2633 to 2651, doi.org/10.1007/s00421-011-1879-2. Basis for placing prolonged static holds after training rather than immediately before heavy lifting.
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I’m Julie Lohre, an IFBB Fitness Pro and certified personal trainer and nutrition specialist. For more than 20 years I have helped women over 40 get stronger, leaner, and more confident through personalized online coaching built around their real lives.