Key Takeaways
- The SI joint connects your spine to your pelvis and is a common source of lower back and buttock pain in seniors
- Gentle pelvic stability and hip-strengthening exercises can reduce SI joint pain without medication
- Most exercises can be done seated or lying down, making them safe for older adults
- Avoid twisting under load, prolonged sitting, and one-sided heavy lifting
- Acute SI joint pain typically improves within 2-4 weeks with proper exercise and rest
Table of Contents
What Is the SI Joint?
The sacroiliac (SI) joint sits where your spine meets your pelvis — specifically where the sacrum (the triangular bone at the base of the spine) connects to the ilium (the large wing-shaped bone of the pelvis) on each side. You have two SI joints, one on the left and one on the right.
These joints are responsible for transmitting all the forces between your upper body and your lower body. Every time you walk, stand up from a chair, or climb stairs, your SI joints are absorbing and transferring load. Despite their importance, SI joint problems are frequently misdiagnosed as general lower back pain, sciatica, or hip problems — which means many seniors are treating the wrong area entirely.
SI joint pain typically presents as a deep ache on one side of the lower back or buttock, and it can sometimes radiate down the back of the thigh. It often worsens with prolonged sitting or standing, and many people notice it most when getting up from a seated position. Not sure what's causing your discomfort? Take our find your exercises quiz to get a tailored recommendation.
What Causes SI Joint Pain in Seniors?
Several age-related factors make SI joint dysfunction more common in older adults:
- Cartilage changes: The cartilage covering the SI joint surfaces wears down with age, leading to rougher joint surfaces and increased friction
- Muscle weakness: Weakened glutes and core muscles — especially common in seniors who are less active — reduce the support around the SI joint and allow excessive movement
- Osteoarthritis: The SI joint can develop osteoarthritis just like any other joint, causing stiffness, inflammation, and pain
- Poor posture: Years of poor sitting and standing habits alter the alignment of the pelvis, placing uneven stress on the SI joints
- Leg length differences: Even a small difference in leg length — whether structural or functional — can cause one SI joint to bear more load than the other over time
The good news is that targeted exercises can address the most common contributors — muscle weakness and joint stiffness — and significantly reduce SI joint pain in many seniors.
7 SI Joint Exercises for Seniors
1. Seated Pelvic Tilts
Sit tall in a sturdy chair with feet flat on the floor, hip-width apart. Slowly tilt your pelvis forward, creating a gentle arch in your lower back. Then tilt backward, rounding your lower back and tucking your tailbone under. Move slowly and smoothly between the two positions, breathing naturally throughout. Repeat 12-15 times. This exercise gently mobilises the SI joint and activates the deep core muscles that support it.
2. Supine Knee-to-Chest
Lie on your back with both knees bent and feet flat on the floor. Gently pull one knee toward your chest with both hands, clasping just below the kneecap. Hold for 20 seconds, feeling a gentle stretch in the SI joint area and lower back. Keep the opposite foot flat on the floor and avoid lifting your head or shoulders. Lower slowly and repeat on the other side. This stretches the muscles around the SI joint and helps relieve tension in the lower back and buttock.
3. Seated Figure-4 Stretch
Sit tall in a chair. Cross one ankle over the opposite knee to form a figure-4 shape. Keeping your back straight, gently lean forward from the hips until you feel a stretch deep in the buttock of the crossed leg. Hold for 20 seconds, then switch sides. This stretches the piriformis muscle, which runs directly over the SI joint and is a frequent contributor to SI joint pain when tight. For more stretches that target this area, see our seated core exercises for seniors.
4. Bridges
Lie on your back with knees bent and feet flat on the floor, hip-width apart. Press through your heels to lift your hips toward the ceiling, creating a straight line from your shoulders to your knees. Squeeze your glutes firmly at the top and hold for 5 seconds. Lower slowly back to the floor. Repeat 10 times. Bridges are one of the most effective exercises for SI joint pain because they strengthen the glutes — the primary muscles that stabilise the SI joint. For more ways to build lower body strength, see our leg strengthening exercises for seniors.
5. Clamshells
Lie on your side with your knees bent at about 45 degrees and your hips stacked one on top of the other. Keeping your feet together, slowly open your top knee like a clamshell, lifting it as high as you comfortably can without rolling your hips backward. Hold briefly at the top, then lower slowly. Repeat 12 times, then switch sides. Clamshells target the gluteus medius — the side hip muscle that plays a critical role in SI joint stability.
6. Seated Hip Adduction Squeeze
Sit tall in a chair and place a pillow or folded towel between your knees. Squeeze the pillow with both knees, engaging your inner thigh muscles. Hold the squeeze for 5 seconds, then release. Repeat 10 times. This exercise strengthens the adductor muscles, which help stabilise the pelvis and support the SI joint from the inside. It's gentle enough to do even during periods of mild SI joint discomfort.
7. Modified Bird-Dog
Start on your hands and knees with your hands under your shoulders and knees under your hips. Keep your back flat like a tabletop. Slowly extend your right arm forward and your left leg backward at the same time, reaching in opposite directions. Hold for 5 seconds, keeping your hips level and avoiding any rotation. Return to the starting position and repeat with the opposite arm and leg. Complete 8 repetitions per side. This exercise builds core stability and teaches the muscles around the SI joint to work together to control pelvic movement. If you find this too challenging, try our exercises for seniors with limited mobility for easier alternatives.
Free SI Joint Exercise Routine
Get a printable daily routine with these exercises, warm-up tips, and a progress tracker — delivered straight to your inbox.
Movements to Avoid with SI Joint Pain
While gentle exercise helps SI joint pain, certain movements can aggravate it. If you're dealing with SI joint dysfunction, avoid or modify the following:
- Twisting under load: Rotating your torso while carrying something heavy puts significant shearing force through the SI joint
- Prolonged sitting: Sitting for more than 30 minutes at a time can stiffen the SI joint and increase pain — stand up and move briefly every half hour
- Crossing your legs: This tilts the pelvis unevenly and places asymmetrical stress on the SI joints
- One-sided heavy lifting: Carrying heavy bags or objects on one side loads one SI joint far more than the other
- High-impact activities: Running, jumping, and high-impact aerobics send shock forces directly through the SI joint and can worsen inflammation
When to See a Doctor
While most SI joint pain responds well to gentle exercise, certain symptoms warrant medical attention. See your doctor if you experience:
- Pain radiating down your leg below the knee
- Numbness, tingling, or weakness in one or both legs
- Pain that wakes you at night or prevents sleep
- Pain that does not improve after 4 weeks of consistent exercise and rest
- Sudden onset of severe pain following a fall or injury
Your doctor may recommend imaging, physical therapy, or other treatments to complement your home exercise programme. You can also try our fall risk assessment to evaluate your balance and fall risk.
Frequently Asked Questions
What is the fastest way to relieve SI joint pain?
Gentle stretching of the piriformis and hip flexors combined with pelvic stability exercises. Apply ice for 15 minutes several times daily during acute pain.
Should I exercise with SI joint pain?
Yes, gentle exercise helps. Avoid high-impact activities. Start with the beginner exercises listed and progress as pain allows.
What makes SI joint pain worse?
Prolonged sitting, standing on one leg, climbing stairs, twisting under load, and sleeping on a sagging mattress.
How long does SI joint pain last?
Acute episodes typically improve within 2-4 weeks with proper exercise and rest. Chronic SI dysfunction may need ongoing management with regular exercises.
68 Chair Exercises — Including SI Joint Relief
Our book includes gentle seated exercises for every joint, with detailed instructions, illustrations, and companion videos so you can check your form at home.
View on Amazon