If you can’t get into a figure 4 stretch, something is limiting your hip’s ability to rotate outward. That rotation, called external rotation, normally ranges from 40 to 50 degrees. When tight muscles, joint stiffness, or structural issues reduce that range, the figure 4 position feels impossible, painful, or both. The good news is that the cause is almost always identifiable, and most people can improve their range over time.
What the Figure 4 Stretch Demands From Your Hip
The figure 4 stretch targets the outer hip and glutes, particularly a deep muscle called the piriformis. To get into position, you cross one ankle over the opposite knee, forming a “4” shape with your legs. This requires your hip to rotate outward significantly while the knee falls open to the side.
That combination of movements asks a lot from the hip joint and the muscles surrounding it. If either the joint itself or the soft tissue around it can’t accommodate that range, you’ll hit a wall. Where you feel the restriction, and what kind of sensation it produces, tells you a lot about what’s going on.
Tight Muscles Are the Most Common Culprit
For most people who can’t do a figure 4 stretch, the piriformis and surrounding glute muscles are simply too tight. This is especially common if you sit for long hours, since the piriformis shortens and stiffens in a seated position. When you then ask it to lengthen during the stretch, it resists.
A tight piriformis also tends to compress the sciatic nerve, which runs directly beneath it (or sometimes through it). This compression can cause pain that radiates down the back of your leg. If your difficulty with the figure 4 comes with a shooting or burning sensation into your buttock or thigh, piriformis tightness is the likely explanation. As the muscle becomes more flexible over time, it puts less pressure on the nerve and your hip’s range of motion increases.
Tightness in the hip flexors and inner thigh muscles (adductors) can also contribute. These muscles oppose external rotation, so when they’re chronically shortened, they actively pull against the movement the figure 4 requires.
Joint Problems That Block the Movement
Sometimes the restriction isn’t muscular. It’s the hip joint itself. Two conditions are worth knowing about.
Femoroacetabular Impingement (FAI)
FAI occurs when the ball and socket of the hip joint don’t fit together smoothly. Extra bone growth on one or both surfaces creates abnormal contact when you move the hip into certain positions. The figure 4 is one of the positions most likely to trigger it. You’ll typically feel a pinching or catching sensation deep in the front of the hip or groin, not in the buttock. This pain is position-related and often worsens during or after physical activity. FAI is common in young athletes, particularly those in sports that demand repetitive hip movement like soccer or hockey.
When external rotation is limited by FAI, the body sometimes compensates by shifting how the pelvis sits, which can create repetitive microtrauma to the joint over time. If you feel a sharp, bony “block” rather than a muscular stretch when attempting the figure 4, this is worth investigating with a healthcare provider.
Hip Osteoarthritis
In people over 50, hip osteoarthritis is a frequent reason external rotation gradually disappears. The cartilage lining the joint wears down, and the resulting inflammation and structural changes progressively limit movement. Early signs include stiffness after sitting or resting, pain in the groin or inner thigh, and a feeling that the hip just won’t open up the way it used to. The pain from hip arthritis can also radiate to the knee, which sometimes leads people to focus on the wrong joint entirely.
Loss of external rotation is one of the earliest measurable changes in hip osteoarthritis, so difficulty with the figure 4 can actually be an early signal before other symptoms become obvious.
Where You Feel It Matters
Pay attention to the location and type of sensation when you attempt the stretch. These patterns point to different causes:
- Deep stretch or tightness in the buttock: This is muscular. The piriformis and glutes are restricting the movement, and consistent stretching will likely improve it.
- Pinching or sharp pain in the front of the hip or groin: This suggests a joint issue like FAI or arthritis. Forcing the stretch won’t help and could make things worse.
- Shooting pain or tingling down the leg: The sciatic nerve is involved, often from piriformis compression or a spinal issue like lumbar stenosis.
- Pain on the inner knee of the crossed leg: This usually means the knee joint is absorbing stress that the hip can’t handle. The hip is still the problem, but the knee takes the hit.
Numbness, weakness in the leg, or tingling that persists after you stop stretching are signs of nerve involvement that warrant professional evaluation.
Easier Variations to Start With
If the standard lying-down figure 4 is out of reach, the seated version reduces the intensity considerably. Sit in a chair with both feet flat on the ground. Place one ankle on the opposite knee, then gently lean forward from the hips while keeping your back straight. Gravity does less of the work in this position, so you control how deep you go. You should feel a stretch along the back of the hip on the crossed-leg side.
If even the seated version is too much, try it without leaning forward at all. Just placing the ankle on the opposite knee and sitting upright may be enough of a stretch initially. You can also use your hand to gently press down on the knee of the crossed leg, adding small amounts of pressure as your body allows.
Another option is the wall-assisted version. Lie on your back with both feet planted on a wall, knees bent at roughly 90 degrees. Cross one ankle over the opposite knee, then slowly slide the supporting foot lower on the wall to increase the stretch. The wall gives you something stable to push against, and you can fine-tune the intensity inch by inch.
How to Build Range Over Time
If the restriction is muscular, consistency matters more than intensity. Stretching the piriformis and outer hip for 30 to 60 seconds per side, several times a day, produces better results than one aggressive session. The muscle needs repeated signals that it’s safe to lengthen.
Warming up before stretching makes a measurable difference. Even a five-minute walk increases blood flow to the hip and makes the tissue more pliable. Stretching cold, tight muscles is less effective and more likely to cause irritation.
Strengthening the muscles around the hip also helps. Weak glutes force the piriformis to pick up extra work, which keeps it chronically tight. Simple exercises like glute bridges and clamshells build strength in the surrounding muscles so the piriformis isn’t constantly overloaded.
Progress is often slow. If your hip external rotation is well below the normal 40 to 50 degree range, expect weeks to months of consistent work before the figure 4 feels comfortable. Small gains in range add up, and most people notice the stretch getting easier within two to three weeks if they stay with it daily. If you’ve been stretching consistently for several weeks with no change, or if pain increases rather than decreases, the problem may be structural rather than muscular.