Quick Answer: Sleeping with a pillow between your legs keeps the hips and spine aligned, reducing lower back pain, hip pressure, and knee discomfort for side sleepers. A contoured memory foam knee pillow ($25 to $50 CAD) works for targeted support. A full-length body pillow ($40 to $100 CAD) provides whole-body support and is especially helpful during pregnancy.
In This Guide
- Why Put a Pillow Between Your Legs?
- Types of Leg and Body Pillows
- Best Knee Pillows in Canada
- Body Pillows: Shapes and Sizes
- Who Benefits Most?
- FAQs
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Why Put a Pillow Between Your Legs?
When you sleep on your side without a pillow between your knees, your top leg drops down under gravity. This pulls your pelvis into rotation, which twists the lower spine. Over hours of sleep, this position creates tension in the lumbar region and compresses the hip joint.
A pillow between the legs keeps both knees at approximately hip height, maintaining neutral pelvic alignment. This reduces strain on the lower back, hips, and knees. It is one of the simplest and least expensive changes you can make to improve sleep comfort.
The Science of Hip Alignment During Sleep
Research published in the Journal of Orthopaedic and Sports Physical Therapy confirms that lateral pelvic tilt during side sleeping contributes to low back pain. Placing a pillow between the knees reduces pelvic tilt by an average of 8 to 12 degrees, significantly decreasing the rotational stress on the lumbar spine. The Cleveland Clinic recommends a pillow between the legs for side sleepers with sciatica, herniated discs, and hip bursitis.
Specific Benefits
- Lower back pain relief: Neutral pelvic alignment reduces lumbar rotation and compression
- Hip pain relief: The pillow prevents the top hip from dropping, reducing pressure on the hip joint and IT band
- Knee protection: Prevents bone-on-bone contact where the knees press together, reducing discomfort and bruising
- Sciatica relief: Neutral spine position reduces pressure on the sciatic nerve
- Pregnancy comfort: Supports the belly and keeps the pelvis aligned as the body changes shape
- Post-surgery recovery: Maintains proper alignment after hip or knee surgery
Types of Leg and Body Pillows
Contoured Knee Pillows
These are small pillows (about 10 by 8 inches) with an hourglass or figure-8 shape designed to fit between the knees. Most are made from memory foam. The contoured shape prevents the pillow from sliding out during the night, which is the main complaint with using a regular pillow between the legs.
Standard Body Pillows
A body pillow is a long, rectangular pillow measuring about 20 by 54 inches. You hug it from the front, which supports your arm, chest, belly, and legs simultaneously. Body pillows are the most versatile option because they provide full-body support and can be used in multiple positions.
C-Shaped Body Pillows
A C-shaped pillow curves around your body, supporting your head at the top and your legs at the bottom. It provides head, neck, back, and leg support in one piece. Popular with pregnant women because the curve wraps around the belly.
U-Shaped Body Pillows
A U-shaped pillow wraps around both sides of the body simultaneously. One arm of the U supports the back while the other supports the front. This is the most supportive option but also the largest, taking up significant bed space.
Wedge Knee Pillows
A wedge-shaped leg pillow elevates one or both legs above heart level. These are used more for circulation issues, varicose veins, and post-surgery recovery than for hip alignment during side sleeping.
| Type | Size | Best For | Price (CAD) |
|---|---|---|---|
| Contoured knee pillow | 10" x 8" | Hip/knee alignment, compact | $25 - $50 |
| Standard body pillow | 20" x 54" | Full-body support, versatile | $40 - $80 |
| C-shaped body pillow | ~60" length | Pregnancy, head-to-toe support | $50 - $100 |
| U-shaped body pillow | ~60" x 30" | Full wrap-around, pregnancy, couples alternatives | $60 - $120 |
| Wedge leg pillow | Varies | Leg elevation, circulation | $30 - $70 |
Best Knee Pillows in Canada
| Pillow | Material | Shape | Price (CAD) | Notes |
|---|---|---|---|---|
| ComfiLife Knee Pillow | Memory foam | Hourglass | $30 - $40 | Best seller on Amazon.ca, adjustable strap available |
| Cushy Form Knee Pillow | Memory foam | Hourglass | $35 - $45 | Firm density, good for heavier sleepers |
| TEMPUR-Pedic Universal Pillow | TEMPUR foam | Rectangular wedge | $50 - $70 | Premium feel, multi-position use |
| Milliard Contour Knee Pillow | Memory foam | Contoured | $25 - $35 | Budget-friendly, washable cover |
Body Pillows: Shapes and Sizes
If you want more than just knee support, a full body pillow provides head-to-toe comfort. Here is what to know about choosing the right one.
Standard Straight Body Pillows
A straight body pillow is the simplest and most affordable option. You hug it from the front and tuck it between your knees at the bottom. It supports your arm (preventing shoulder compression), your belly (if pregnant), and your legs.
Standard body pillow dimensions are approximately 20 by 54 inches. They fit standard body pillow covers, which are widely available. The fill is usually polyester fibre, memory foam, or down alternative.
Body Pillow Cover Options
Body pillow covers come in cotton, bamboo, microfibre, and jersey knit. Cotton and bamboo are the most breathable. Jersey knit has a soft, stretchy feel. Choose a cover with a zipper for easy removal and washing.
U-Shaped vs. C-Shaped: Which Is Better?
| Feature | U-Shaped | C-Shaped |
|---|---|---|
| Support areas | Head, back, front, and legs | Head, front or back, and legs |
| Switching sides | Easy (support on both sides) | Need to reposition pillow |
| Bed space needed | Large (30+ inches wide) | Moderate (20+ inches) |
| Best for pregnancy | Excellent | Very good |
| Couples sharing bed | Challenging (takes up a lot of room) | Better (less space) |
| Price (CAD) | $60 - $120 | $50 - $100 |
Who Benefits Most from a Leg or Body Pillow?
Side Sleepers
All side sleepers benefit from a pillow between the legs. It is particularly important for side sleepers with wide hips, as the greater distance between the knees creates more pelvic tilt without a pillow. See our side sleeper pillow guide for head pillow recommendations to pair with a knee pillow.
Pregnant Women
A body pillow becomes essential for many women during the second and third trimesters. The growing belly needs support to prevent lower back strain, and sleeping on the left side (recommended for circulation) is more comfortable with proper hip alignment. C-shaped and U-shaped pillows are the most popular pregnancy options.
People with Hip or Back Pain
If you wake up with hip soreness, lower back stiffness, or sciatica symptoms, a knee pillow is one of the first things to try. It is inexpensive, non-invasive, and effective for many people. Chiropractors and physiotherapists frequently recommend knee pillows as part of a sleep hygiene routine.
Post-Surgery Recovery
After hip or knee surgery, maintaining proper leg alignment during sleep is critical for healing. A contoured knee pillow keeps the surgical joint in a neutral position and prevents accidental twisting during the night.
Brad, Senior Sleep Consultant at Mattress Miracle: "A lot of people come in with hip pain and think they need a new mattress. Sometimes they do, but we always ask about their pillow setup first. Adding a knee pillow is a $30 fix that often solves the problem. If hip pain persists after that, then we look at mattress firmness and support."
Your Complete Sleep Setup
A knee pillow works best when paired with the right mattress and head pillow. At Mattress Miracle in Brantford, we can help you find the full combination. Lie on our showroom mattresses in your preferred sleep position, test different pillow heights, and see how adding a knee pillow changes the feel. We have been helping Brantford families sleep better since 1997. Visit us at 441 1/2 West Street.
Frequently Asked Questions
Why should you sleep with a pillow between your legs?
A pillow between the legs keeps the hips, pelvis, and spine aligned when lying on your side. Without one, the top leg drops, rotating the pelvis and straining the lower back. A knee pillow maintains neutral alignment and reduces pressure where the knees press together.
What type of pillow is best between the legs?
A contoured memory foam knee pillow with an hourglass shape is the most popular choice. It fits naturally between the knees and stays in place. Prices start around $25 to $30 CAD on Amazon.ca. A regular bed pillow works too but tends to shift during the night.
What is the difference between a body pillow and a knee pillow?
A knee pillow is small and fits only between the knees. A body pillow is 4 to 5 feet long and supports your arm, belly, and legs simultaneously. Body pillows are better for pregnancy and full-body comfort. Knee pillows are compact and focused specifically on hip alignment.
Is a U-shaped body pillow worth it?
If you have the bed space, yes. U-shaped pillows support both sides of the body, so you can switch sides without repositioning the pillow. They are excellent for pregnancy. The main drawback is size: they take up about 30 inches of bed width, which can crowd a partner on a queen-size bed.
Shop: Pillows at Mattress Miracle
Shop This Topic at Mattress Miracle
Popular pillows at Mattress Miracle:
- Somnia 3.0 posture pillow
- Symbia Orthopedic Wedge Pillow
- Talalay Latex Pillow (Dreamcloud)
- Cool Ice Pillow (Cooling Gel)
Or our full pillow range in our Brantford showroom.
Find Your Perfect Sleep Setup at Mattress Miracle
We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try mattresses and pillows together for the best alignment and comfort.
441 1/2 West Street, Brantford, Ontario
Call 519-770-0001Visit Our Brantford Showroom
We are located at 441 1/2 West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.
Mattress Miracle -- 441 1/2 West Street, Brantford, ON -- (519) 770-0001
Hours: Monday-Wednesday 10am-6pm, Thursday-Friday 10am-7pm, Saturday 10am-5pm, Sunday 12pm-4pm.
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