Shin Box Switch
What Is the Shin Box Switch?
Shin Box Switch is a compound exercise that primarily targets the hips and groin and also engages the glutes and core. It is an intermediate-level movement in which you sit on the floor in the shin box position, with both legs bent to about 90 degrees, and rotate your legs from one side to the other while your torso stays tall and your arms reach forward, without any help from your hands.
The drill trains both directions of hip rotation at once. In the shin box, the front hip is turned out and the back hip is turned in, and every switch makes the two hips trade roles, so each side moves through its full range of internal and external rotation with every rep. That makes it a popular hip mobility drill and a common part of a warm-up before squatting, deadlifting or running, when you want the hips moving freely before they are loaded.
The back hip does the harder mobility work, turning in against the stiffness of the rotators at the back of the hip, and the tensor fasciae latae, the front fibers of the gluteus medius and minimus and the adductors are the muscles that turn it in. The front hip turns out with help from the gluteus maximus. Because your hands never touch the floor, the hip flexors and abdominals have to hold your torso upright over your hips, and reaching the arms forward acts as a counterweight. Placing your hands on the floor behind you, as in the 90/90 Hip Switch, takes much of that trunk and hip flexor work away and makes the switch easier, while slower switches and longer pauses in each shin box make it harder.
The Shin Box Switch suits anyone whose hips feel stiff from long periods of sitting, and lifters and athletes who want more control of hip rotation rather than only a passive stretch. If you fall backward, cannot lift your knees through the middle without your hands, or feel the knees rather than the hips, build up with Lying Windshield Wipers and the 90/90 Hip Switch first, or sit on a folded blanket so your hips are higher than your knees.
Muscles Worked
- Gluteus Medius
- Primary
- Tensor Fasciae Latae
- Primary
- Adductor Longus
- High
- External Oblique
- High
- Gluteus Maximus
- High
- Gluteus Minimus
- High
- Rectus Abdominis
- Medium
- Rectus Femoris
- Medium
- Sartorius
- Medium
Instructions
- Sit on the floor in the shin box position: your front leg bent about 90 degrees with the outer shin on the floor across the front of your body, and your back leg bent about 90 degrees out to the side behind you with the inner knee on the floor.
- Sit tall with your chest facing over your front shin and reach both arms straight forward at shoulder height.
- Brace your abs lightly and keep your hips on the floor throughout.
- Lift both knees toward the ceiling, turning your torso to face forward, until both feet are flat on the floor about shoulder-width apart and your hands rest lightly on top of your knees.
- Keep rotating in the same direction and lower both knees to the other side, turning the new front leg out and the new back leg in, until you are in the mirror-image shin box.
- Turn your chest to face over the new front shin, sit tall, and reach both arms forward again.
- Pause for a breath, then switch back through the middle to the first side, moving slowly and letting the rotation come from your hips rather than your lower back.
- Keep alternating for 6 to 10 switches per side.
Common Mistakes
Twisting through the lower back
Turning the chest while the pelvis stays put makes the spine do the rotation, so let the legs rotate at the hips and let the torso turn with the pelvis.
Rounding or leaning back
Slumping onto the tailbone takes the hips out of position and puts load on the lower back, so sit tall with the arms reaching forward, or raise the seat on a folded blanket.
Throwing the legs across
Swinging the knees over with momentum skips the end range the drill is meant to train and jolts the knees, so lift and lower the legs slowly under control.
Forcing the knees to the floor
Pushing a knee down past what the hip allows moves the twist into the knee joint, so let each knee settle only as low as the hip lets it.
Holding your breath
Bracing without breathing makes the torso rigid and the switch jerky, so breathe out as the knees come through the middle and breathe in at each side.
Injuries
Shin Box Switch is a low risk exercise when performed with proper technique. It uses only body weight, but it takes both hips to the end of their rotation, and when a hip runs out of rotation the twist moves into the bent knee, especially the back knee as it turns in. The knees are the main strain point, followed by the front of the hip, which can pinch when a stiff hip is forced into deep internal rotation, and the lower back if you twist through it to get the legs across.
Move slowly and let each knee lower only as far as the hip allows; a knee that hovers above the floor is fine and should never be pushed down. Sitting on a folded blanket or low cushion raises the hips, reduces the rotation needed and makes an upright torso easier to hold. Cramping in the front of the hip is common while the hip flexors get used to holding the torso up, so rest and switch to a supported version for a few reps if it happens.
If you cannot switch without falling back, regress to the 90/90 Hip Switch with your hands on the floor behind you, or to Lying Windshield Wipers, which work the same rotation with no body weight over the hips. To progress, slow the switch down, pause longer in each shin box, or lift your hips off the floor into tall kneeling from each shin box before switching.
Stop if you feel sharp or twisting pain in either knee, a pinch in the front of the hip that does not ease when you shorten the range, or numbness or tingling down the leg. Anyone with a knee ligament or meniscus injury, or recovering from hip or knee surgery, including a hip replacement, should clear deep hip rotation with their surgeon or physical therapist first.
- Primary Focus
- Hips & groin
- Equipment
- Body weight
- Modality
- Stretching
- Difficulty
- Intermediate
Alternative Exercises
Frequently Asked Questions
- Q: What is the difference between Shin Box Switch and 90/90 Hip Switch?
Both switch the legs between the two 90/90 positions, but in the 90/90 Hip Switch you lean back onto your hands, which takes weight off the hips and trunk. In the Shin Box Switch your hands stay off the floor and your torso stays tall, so the hip flexors and abdominals hold you upright and the hips have to rotate further under your body weight.
- Q: Should I rise up onto my knees between sides?
Not in this version: the hips stay on the floor and the knees rise through the middle as the legs switch. Lifting the hips into tall kneeling from each shin box is a harder progression that adds glute work, and it is worth adding only once the basic switch is smooth.
- Q: Why do my hip flexors cramp during Shin Box Switches?
Holding your torso upright with no hand support makes the hip flexors work hard in a shortened position, and cramping there is common at first. Sit on a folded blanket, rest between sets, or place your hands behind you for a few reps until the position gets easier.
- Q: How many reps should I do?
About 6 to 10 slow switches per side, for one or two sets, works well as part of a warm-up. Pausing for a breath in each shin box is more useful than doing more reps faster.
- Q: What if my knees do not reach the floor?
That is normal when the hips are stiff, especially for the back knee as it turns in. Let the knees hover rather than pushing them down, sit on a folded blanket to raise your hips, and the range will improve with regular practice.