Is Reformer Pilates Good for Building Bone Density?

Is Reformer Pilates Good for Building Bone Density? What I’ve Learned Teaching Along the Wasatch Front

Strength isn’t always loud. Sometimes it’s built in the quiet, spring-loaded push of a carriage.

If you’ve found yourself wondering is reformer Pilates good for building bone density, you’re asking one of the most important questions I hear in my studio. Women in their 40s, 50s, and beyond sit across from me — often after a bone scan that shook them — and ask if the reformer can help. The answer isn’t a simple yes-or-no checkbox. It’s more nuanced than that. And it’s worth every word that follows.

Bone loss is quiet. It doesn’t announce itself until something cracks. That silence is what makes it so frightening — and it’s what drives so many of my clients along the Wasatch Front, from Sandy to Draper to Park City, to start searching for weight-bearing exercise that doesn’t wreck their joints. Reformer Pilates lives in that sweet spot. But let me tell you what the research actually says, what I see in my teaching, and where the honest limitations are.

Is Reformer Pilates Good for Building Bone Density? The Short Answer

Bone responds to mechanical stress. This is Wolff’s Law — a principle established in the 19th century that remains foundational in orthopedic medicine. When muscles pull on bone during resistance exercise, the bone adapts by becoming denser and stronger. The reformer, with its adjustable spring system, creates exactly that kind of progressive muscular tension.

A 2020 study published in the Journal of Bodywork and Movement Therapies found that Pilates-based exercise programs showed positive effects on bone mineral density in postmenopausal women, particularly at the lumbar spine and femoral neck — two of the most fracture-prone sites. Other research in Archives of Osteoporosis has echoed these findings, showing that resistance-based Pilates can slow the rate of bone loss when practiced consistently.

Is it the single most powerful bone-building modality? No. Heavy barbell squats and plyometric jumping generate more ground-reaction force. But for a lot of the women I work with in Utah County and the Salt Lake Valley, those options feel inaccessible or unsafe. The reformer meets them exactly where they are.

How the Reformer Creates Bone-Loading Stimulus

Understanding why reformer Pilates can influence bone density requires understanding how the machine works. It isn’t just stretching on a fancy bed.

The reformer uses a sliding carriage connected to springs of varying resistance. When you push or pull against those springs — in a footwork series, a standing lunge, or a pulling straps sequence — your muscles contract forcefully against resistance. Those muscle contractions create tensile and compressive forces on the bones they attach to.

Here’s what matters for bone health specifically:

• Progressive resistance: Springs can be increased as you get stronger. Bone needs increasing load over time to continue adapting — this is called progressive overload.
• Weight-bearing positions: Many reformer exercises place you on your feet (standing splits, lunges, scooter) or on hands and knees, loading the spine, hips, and wrists through gravity plus spring tension.
• Multi-directional loading: The reformer allows pulling, pushing, rotation, and lateral movement. Bone responds best to varied force directions, not just one plane of motion.
• Eccentric contractions: Controlling the carriage as it returns — the deceleration phase — creates substantial muscular and skeletal load. The reformer practically demands eccentric control.

In my Alchemize Pilates classes, I specifically program footwork series at heavier spring loads, standing balance work, and pulling exercises because I know many of my clients are training for bone health whether they realize it or not.

What I See in My Studio: Real Clients, Real Bones

I want to be careful here. I’m a Pilates instructor, not an endocrinologist. I don’t order DEXA scans or prescribe medication. But I’ve had the privilege of working with clients who share their medical results with me — and some of those conversations have stopped me in my tracks.

One of my long-term clients — a woman in her early 60s who lives near Cottonwood — came to me three years ago after being diagnosed with osteopenia. Her doctor told her she needed resistance training. She was terrified of the gym. We started with two reformer sessions per week, focusing on heavy spring footwork, prone pulling straps, quadruped arm and leg work, and standing reformer exercises.

At her follow-up DEXA scan 18 months later, her T-scores had stabilized. Not dramatically improved, but stabilized — which in the context of postmenopausal bone loss is significant. Her doctor was encouraged. She was elated. And she told me something I’ll never forget: “I came because I was scared. I stayed because I feel strong.”

I’ve seen similar patterns with other clients. Not miraculous reversals, but a slowing of loss, an increase in confidence, and — critically — better balance and coordination, which reduces fall risk. Because bone density is only half the equation. If you don’t fall, you don’t fracture.

The Honest Limitations: Where Reformer Pilates Falls Short for Bone Density

I believe in honesty over hype. Here’s where I have to level with you.

The research on bone density and exercise consistently shows that the most potent stimuli for bone formation are:

1. High-impact loading — jumping, running, stomping. The sudden ground-reaction forces signal bone to build rapidly.
2. Heavy resistance training — squats, deadlifts, and presses at loads exceeding 70-80% of your one-rep max.

Reformer Pilates, even at its heaviest spring settings, typically doesn’t reach those force thresholds. The springs on most commercial reformers max out at a level that’s challenging for muscular endurance but not equivalent to heavy barbell work. And the reformer is low-impact by design — which is wonderful for joint health but means it doesn’t deliver the same percussive skeletal loading as jumping.

This doesn’t make it useless. Far from it. But if bone density is your primary medical concern, I’d encourage you to consider a combined approach. Reformer Pilates alongside walking, gentle plyometrics (if your doctor approves), or some form of progressive weight training can be powerful. I’ve written about the differences between reformer Pilates and the gym — they’re not enemies. They’re teammates.

Some of my clients do both. They come to my studio twice a week and lift weights once or twice on their own. That combination tends to produce the best results — for bones, for posture, for life.

Why Bone Density Isn’t the Whole Story (And Where Reformer Pilates Shines)

Here’s something that doesn’t get enough attention: bone density numbers are just one predictor of fracture risk. The other — equally important — predictor is fall risk.

A person with slightly lower bone density who has excellent balance, proprioception, core stability, and reactive strength is at lower fracture risk than someone with better T-scores who trips over a curb.

This is where reformer Pilates doesn’t just contribute. It dominates.

• Balance training: Single-leg standing work, split-stance lunges, and unstable surface challenges on the reformer build the kind of balance that prevents falls.
• Proprioception: The moving carriage requires constant spatial awareness. Your body learns where it is in space — a skill that degrades with age but can be rebuilt.
• Core stability: Joseph Pilates called the core the “powerhouse” for a reason. A stable trunk protects the spine during unexpected perturbations — like stumbling on an icy Draper sidewalk in January.
• Posture correction: Kyphotic (rounded) posture increases vertebral compression fracture risk. Reformer Pilates is one of the most effective tools I’ve used for thoracic extension and spinal alignment.
• Confidence: Clients who feel strong move through the world differently. They step more boldly. They catch themselves when they stumble. This isn’t woo — it’s motor learning.

When we zoom out from the DEXA scan number and look at the whole picture of skeletal health, reformer Pilates earns its place at the table — not as a silver bullet, but as a powerful, sustainable, joint-kind practice that addresses multiple fracture risk factors simultaneously.

Practical Tips for Using Reformer Pilates to Support Bone Health

If you’re training on the reformer with bone density in mind — whether at my studio or elsewhere — here are the principles I follow:

1. Use heavier springs when appropriate. Don’t default to light resistance. Bone needs load. If your footwork feels easy, add a spring.
2. Prioritize weight-bearing exercises. Standing lunges, scooter, standing arm work, and quadruped positions load the skeleton more than supine exercises.
3. Train consistently. Bone adaptation is slow. You need at least 2-3 sessions per week, sustained over months and years. This isn’t a 30-day fix.
4. Include upper body pulling and pushing. The wrists, shoulders, and thoracic spine need loading too — especially for women, who are vulnerable to distal radius (wrist) fractures.
5. Don’t skip the eccentric phase. Control the carriage on the way back. That slow, controlled return is where a huge percentage of your bone-loading stimulus lives.
6. Complement with impact if you can. Even brisk walking, heel drops, or gentle skipping adds percussive load that the reformer doesn’t provide.

If you’re in the Salt Lake City area — Sandy, Lehi, Draper, anywhere along the Wasatch Front — and you’d like guidance on building a bone-health focused reformer practice, I’d love to work with you. You can book a session here and we’ll build a plan that’s actually tailored to your body and your goals.

Is Reformer Pilates Good for Building Bone Density? My Final Honest Take

So — is reformer Pilates good for building bone density? Yes. With nuance.

It provides meaningful resistance training that can stimulate bone adaptation, particularly when programmed with heavier springs and weight-bearing positions. It excels at reducing fall risk through balance, proprioception, and core stability. It is sustainable, joint-friendly, and adaptable to nearly any fitness level or limitation. It is not the most aggressive bone-building tool available, and for someone with severe osteoporosis, it should be part of a broader strategy that includes medical guidance, nutrition (calcium, vitamin D, protein), and possibly higher-load exercise.

But here’s what I know after years of teaching: the best exercise for your bones is the one you’ll actually do. Consistently. With joy. With a body that feels capable instead of broken. For so many of my clients, reformer Pilates is that exercise. And that matters more than any study can measure.

— Bianca

Bianca — Founder & Lead Instructor, Alchemize Pilates

Bianca is a certified Pilates instructor and the founder of Alchemize Pilates, a boutique reformer studio serving clients across Utah’s Wasatch Front. With advanced training in classical and contemporary Pilates methods, she specializes in working with women navigating perimenopause, postmenopause, and bone health concerns. When she’s not teaching, you’ll find her on the trails above the Salt Lake Valley or researching the latest in movement science.