Why Does My SI Joint Hurt After Rolling on the Floor?

Why does my SI joint hurt after rolling on the floor? It is a fair question, and a common one after floor lessons. In most cases the area is simply irritated by pressure, effort or too much of a good thing, and a few small changes help. Paying attention to how you move, and doing less when your body asks for less, is the heart of the Feldenkrais Method®.

What the SI joint is, in plain words

You have two sacroiliac joints, often called SI joints. They sit at the back of your pelvis, one on each side, where the triangle shaped bone at the base of your spine (the sacrum) meets the pelvis. You can find the area by feeling for the two small dimples just above your buttocks.

These joints move only a little. That small movement is useful when you walk, bend and turn. But the area can feel sore when it is pressed, loaded or asked to work hard for a long time. Low back pain is very common: about 619 million people lived with it worldwide in 2020 (WHO, 2023). So if this happens to you, you are in large company.

Why your SI joint can hurt after rolling on the floor

Floor work looks gentle, yet several small things can add up. Here are the most common ones.

• Direct pressure on a hard surface. When you lie on a thin mat or bare floor, the sacrum presses straight into it. Rolling over that spot can leave the area tender.
• Big or fast rolls. A large swing of the pelvis asks the joint to go further, faster, than it was ready for.
• Momentum. Throwing a knee or hip over to get moving does the work for you, but the joint takes the jolt.
• Holding on with effort. Gripping the legs or pelvis, or holding your breath, makes the muscles around the joint work hard for no reason.
• Twisting further than is comfortable. The end of a turn is often where the ache begins.
• Many repetitions. The tenth roll is not the same as the second. Tired muscles share less of the load.
• One side doing all the work. If one side is stiffer, it may take the strain every time you roll.

A normal ache and a warning sign

Some soreness after unfamiliar movement is normal. It is usually dull, stays in the same area, and eases as the day goes on. A short rest, a walk and a change of position often help.

Take a different view when you notice any of these:

• pain that spreads down a leg
• numbness or weakness in a leg or foot
• pain after a fall or a knock
• fever
• any change in bladder or bowel control, which needs urgent medical care

These signs are not a verdict on how you moved. They are signs that a professional should take a look. The sciatica and nerve pain background in our Feldypedia article on sciatica and nerve related back pain explains how the two can differ.

What to change next time

Small adjustments often make the difference. Try them one at a time.

• Soften the surface. Use a thick mat, or fold a blanket and place it under your pelvis.
• Make the roll smaller and slower. Move only as far as feels easy, and pause when you notice effort.
• Roll as one piece. Keep your knees bent and let the whole trunk turn together, with no jerk.
• Do fewer repetitions. Three easy rolls are better than twelve tired ones.
• Rest on your side. Lie on your side with a pillow between the knees whenever you like.
• Imagine it instead. You can skip the movement and picture it. Your brain still takes part, and the joint gets a break.

In a Feldenkrais® lesson, you are always free to do less. That is part of the method. If this way of moving interests you, Feldy offers slow, guided lessons that ask for attention rather than effort. You can also read our guide to SI joint movements to approach with care and the page on sacroiliac joint dysfunction symptoms. For a calmer way to practise, see how to relax your back. For the wider picture, our Feldypedia article on chronic lower back pain is a helpful read.

Common Questions about SI joint pain after rolling on the floor (FAQ)

Is it normal for my SI joint to ache after rolling on the floor?

A mild, dull ache that settles within a day or two is quite common after floor work, especially if the surface was hard or you did more than usual. It is a signal to adjust, not a reason to panic. Sharp pain, pain that grows, or pain that does not ease with rest is different, and worth showing to a doctor or physiotherapist.

Who should avoid floor work like this?

Anyone whose pain is sharp, getting worse, or came after a fall should check with a professional before lying on the floor and rolling. The same goes for people with leg weakness, numbness, or a recent injury. You can always skip the movement and imagine it instead, which still trains attention. If you are unsure, ask your doctor or physiotherapist what suits you.

How often should I do floor rolling movements?

Less often than you might think. A few short, slow rounds on a soft surface, once a day or every other day, is plenty while the area is touchy. Rest between rounds. If you notice an ache the next morning, do fewer rolls or take a day off and let the area settle.

How long does an SI joint ache last after rolling?

A mild ache after too much pressure or too many repetitions often fades within a day or two. If it lasts longer than a few days, keeps coming back each time you roll, or grows stronger, stop the rolling and have it looked at. Everyone settles at their own pace, so notice the trend over days, not hours.

How is SI joint ache different from sciatica?

SI joint ache is usually felt low on one side of the back, near the dimple above the buttock, and can be local. Sciatica is pain that travels down the back of the leg, often with tingling or numbness. They can overlap, so if pain spreads down the leg, or you notice numbness or weakness, get it checked rather than guessing.

Should I stop Feldenkrais® if my SI joint hurts after a lesson?

Not necessarily, but do change how you take part. Make every movement smaller and slower, use a folded blanket under your pelvis, rest often, or only imagine the movement. A good lesson never asks you to push through pain. If the ache keeps returning after lessons, pause floor work and talk to a professional.

Which signs mean I should get my SI joint pain checked?

See a doctor or physiotherapist if the pain lasts, keeps returning, or limits your day. Get checked soon if pain spreads down a leg, or you notice numbness, weakness, pain after a fall, or fever. Any change in bladder or bowel control needs urgent medical care. Feldy sits alongside professional care and never replaces it.