High Impact Exercise for Osteoporosis: How Much Is Safe?

June 23, 2026

For years, women with osteoporosis were told to play it safe: walk, don’t jump, and don’t lift anything heavy. I understood the caution. But for many of my patients it left them weaker, more fearful, and no better protected from fracture.

The truth sits between two extremes. Impact, the kind of loading where your bones feel real force, is one of the most effective stimuli for building bone. But “high impact exercise for osteoporosis” is not one prescription you either follow or avoid. The right amount of impact for someone preventing osteoporosis is very different from the right amount for someone who has already had a vertebral compression fracture. Getting that dose right is the whole game, and getting it wrong can cause exactly the fracture you’re trying to prevent.

In this guide I’ll explain what impact does for bone, how to match the level of impact to your own fracture risk, and why I’m cautious about the heavy, high-intensity programs being marketed to women with osteoporosis right now.

Is High Impact Exercise Safe and Effective for Osteoporosis?

Short answer: For most people with osteopenia or osteoporosis, appropriately dosed impact exercise is both safe and effective for building bone, but the level of impact must be matched to your fracture risk. Light, controlled impact suits someone who is new to it or at higher fracture risk; greater impact suits someone with better bone density and a solid movement foundation.

What I caution against is jumping straight into heavy, high-intensity impact protocols (such as the LIFTMOR program) without screening, preparation and supervision. That’s where I see people get hurt.

High Impact Exercise Examples

High impact exercise examples include running, brisk walking, jumping, jumping rope, jumping jacks, hopping, squat jumps, and skipping. Many of these occur during high intensity interval training (HIIT).

High Impact Exercise for Osteoporosis

Bone is living tissue, and it responds to demand. When you load it with force that is larger or faster than it is used to, you signal the cells in your bone to build. Research from Dr. Janet Rubin’s group at the University of North Carolina helps explain why: dynamic, repetitive loading steers the stem cells in your bone marrow toward becoming bone-building cells rather than fat cells. Static, gentle, or very repetitive low-level activity — including steady walking — generally isn’t enough on its own to increase density in postmenopausal women. Impact supplies the magnitude and speed that bone needs.

Here is what is happening inside the bone. Bones adapt their structure based on the mechanical forces applied to them.(2) When those forces exceed a certain threshold, bone formation begins to outpace bone breakdown, and the bone grows stronger. The cells responsible for breaking bone down (osteoclasts) and building it back up (osteoblasts) stay active throughout adulthood, though their number and function decline with age.

Your bone marrow also produces mesenchymal stem cells every day — undifferentiated cells that can become bone, muscle, or ligament. Their main nourishment is mechanical stimulation. When your muscles work hard against impact they vibrate, and that vibration prompts these stem cells to become bone-building cells. This is why high impact exercise is such a powerful stimulus: it creates the larger, faster forces that drive bone formation.

So yes, impact increases bone density. The real question is never whether to include it — it’s how much, for you. And that depends entirely on your fracture risk.

Match the Impact to Your Fracture Risk

The right impact depends on where you sit on the fracture-risk spectrum. This is exactly how I tier the programs in Exercise for Better Bones, by fracture risk and activity level, because a single prescription can’t be safe for everyone.

Building bone before osteoporosis (prevention).

If your bone density is normal and you have no fracture history, your bones can take, and benefit from, genuine high impact: jogging, skipping, jumping, hopping, and varied, multi-directional movement. This is the time to build reserve.

Osteopenia or osteoporosis, no fracture.

Moderate, progressive impact is appropriate and effective, but the operative word is progressive. Start with controlled, lower-level impact (heel drops, light hops, marching with intent), confirm you can do it with good form and no pain, and build the volume and height gradually over weeks and months. Impact works best layered onto a foundation of strength, weight-bearing and balance work, not as a stand-alone stunt.

Vertebral fracture, multiple fractures, or very low bone density.

If you’ve had a vertebral compression fracture, more than one low-trauma fracture, or your bone density is very low, the calculus changes. Higher-level impact carries real risk here, and the priority becomes loading bone safely while you build strength, posture and balance first. For most people in this group I keep impact gentle, closer to brisk walking, and I want to examine their technique. This is a program to build with a physical therapist, not from a video.

What “modified impact” actually means. When I modify impact for someone, I change one or more of: the height (a heel drop instead of a jump), the surface (a forgiving floor rather than concrete), the support (a hand on the counter), the volume (a few quality impacts, not dozens), and whether both feet leave the ground at once. Modified impact isn’t a watered-down version of “real” exercise, it’s the correct dose for your bones today, and the base you progress from.

Which Impact Exercises Load Which Bones

Once you know which level you’re working at, you can choose impacts that load the bones most at risk. The hip and spine are where osteoporotic fractures do the most damage, so they deserve priority.

To work out which movements load which bones, a 2024 research team (1) measured the forces at the hip, knee and ankle while 40 healthy, active adults (average age 40) performed six activities: walking, running at different intensities, countermovement jumps, squat jumps, one-legged (unilateral) hopping, and two-legged (bilateral) hopping. The results give useful guidance for choosing exercises — once you’ve established that impact is appropriate for you.

Hip Joint

The hip joint is particularly vulnerable to osteoporotic fractures, making it a priority area for bone-strengthening exercise. According to the study:

Running created the highest forces at the hip joint—up to 83% greater than walking. Fast running (sprinting) generated even higher hip forces than moderate-paced running.
Unilateral hopping (on one leg) also provided significant loading—21% higher than walking.
Interestingly, jumping exercises and bilateral hopping actually provided less force at the hip than walking.

Hip-Focused Recommendation: If your goal is to strengthen hip bones, running should be your primary activity, with faster running creating greater bone-building stimulus. One-legged hopping exercises also provide excellent hip loading.

Knee Joint

For the knee joint, the study revealed:

All exercises tested provided higher forces at the knee compared to walking.
Running again led the way, with forces 134% higher than walking.
Countermovement jumps (97% higher) and unilateral hopping (94% higher) were also very effective.
Squat jumps created forces 85% higher than walking.
Bilateral hopping showed the smallest increase (42%).

Knee-Focused Recommendation: All the high-impact exercises were beneficial for knee loading, with running providing the greatest stimulus, followed closely by jumping and one-legged hopping.

Ankle Joint

For the ankle joint:

Running increased forces by 94% compared to walking.
Unilateral hopping increased forces by 77%.
Bilateral hopping increased forces by 30%.
Interestingly, jump exercises actually reduced ankle loading compared to walking (19% less for squat jumps and 3% less for countermovement jumps).

Ankle-Focused Recommendation: Running and hopping exercises (especially on one leg) provide excellent loading for ankle bones, while jumping exercises may not be as effective for this joint.

How High Impact Exercise Affects Joint Loading

The researchers also examined how varying the intensity of each exercise affected joint loading. These findings are particularly valuable for creating progressive osteoporosis exercise programs:

Running Intensity

Increasing running speed from jogging to moderate speed increased forces at all joints.
Sprinting (maximum speed) dramatically increased hip joint forces but actually decreased forces at the knee and ankle.

Jumping Intensity

Higher jumps increased forces at all lower limb joints.

Hopping Intensity

Interestingly, faster hopping frequency actually reduced forces at all joints.

Exercises to Increase Bone Density in the Spine

To build bone density in the spine, combine progressive resistance, controlled impact, and back-extensor strength, and avoid forward bending of the spine.

Progressive resistance training to the point of muscle fatigue (in the range of 5–12 repetitions), advanced gradually. Research shows the spine responds particularly well to higher-intensity loading.
Controlled impact — hopping, jumping, heel drops, or stamping, dosed to your fracture-risk level (see above).
Back-extensor (paraspinal) strengthening to support posture and resist the forward collapse that drives vertebral fracture.

Just as important is what to avoid: loaded or repeated forward bending of the spine (deep crunches, toe-touches, rounded-back lifting), which raises vertebral fracture risk, it’s the flexion that’s dangerous, not impact in itself.

Osteoporosis Exercise Fundamentals in 7 Days

Get the 7-day email course: Learn the safest exercises to start after a diagnosis of osteoporosis or osteopenia.

Send Me the Free Course

Free · No spam · Unsubscribe Anytime

A Word on LIFTMOR and "Just Lift Heavy and Jump"

You may have read that a study called LIFTMOR proved heavy lifting and impact training is safe for women with osteoporosis.

The results were real, participants improved their bone density. But I want you to understand who those participants were: out of nearly 600 applicants, fewer than one in five qualified after rigorous screening, and anyone with significant musculoskeletal or other health conditions was excluded. They then trained under close supervision in tiny groups after a month of preparation. Most people with osteoporosis, who, on average, carry several other health conditions, would not have made it into that study.

I’ve heard from readers who followed LIFTMOR-style programs on their own, or in crowded classes, and ended up injured, including a vertebral compression fracture.

So while I’m an enthusiastic advocate for impact and for strength training, I’m cautious about heavy, complex lifts like the loaded deadlift for this population, and I don’t think anyone should attempt a LIFTMOR-style program without proper screening, preparation and supervision.

Read my full analysis of whether LIFTMOR is safe for people with low bone mass.

Building a Safe High Impact Routine

A good osteoporosis exercise program never relies on impact alone. It layers appropriate impact onto strength training, weight-bearing activity, balance, and flexibility, the multi-dimensional approach supported by long-term research such as Dr. Kemmler’s 16-year work, which used a graduated build-up rather than maximal loading and still produced meaningful results. Aim to train consistently, three or more times a week, and let your technique and your fracture risk, not your enthusiasm, set the pace.

How much impact, and how intense, follows the fracture-risk level you identified earlier. If your bones are healthy and you have a solid movement foundation, you can include genuine high impact across the week, a mix of running (including the occasional faster interval), hopping on one and two legs, and jumping, because variety loads the widest range of bones. If you have osteopenia or osteoporosis without a fracture, keep the impact moderate and progressive rather than maximal. And if you are at higher risk, keep impact gentle and build it with a physical therapist.

If you are new to impact, or returning after a break, build up in this order:

Start with brisk walking.
Add gentle two-legged (bilateral) hopping.
Progress to short, gentle jogging intervals.
Add jumping once the steps above feel comfortable and pain-free.
Only then consider one-legged (unilateral) hopping and faster running, if they suit your fracture risk.

Give your bones time to adapt between steps, weeks, not days, and stay at each level until it feels easy and pain-free before moving on.

How to Choose a High Impact Exercise

Osteoporosis is a systemic disease, affecting bones throughout your body, so a good program spreads impact across many of them rather than loading just one. How you choose, though, can shift if you also have a joint problem such as osteoarthritis or a joint replacement.

It helps to keep two separate goals in mind:

To build a particular bone, you want more force through it. The forces in the section above are your guide — running, for example, drives the most load through the hip.
To protect a joint that is arthritic or replaced, you want less force through it. You use the same findings in reverse, choosing the gentler option for that joint.

So if you have significant arthritis or a joint replacement, be selective. With advanced knee arthritis, for instance, running puts far more force through the knee than squat jumps do — so you might skip the running and use squat jumps instead. A quick guide for sparing a sensitive joint:

Hip: favour two-legged (bilateral) hopping and jumping, which load the hip less than running.
Knee: bilateral hopping adds the least load of the high-impact options.
Ankle: jumping, especially squat jumps, can actually reduce ankle loading compared with walking.

When a joint is healthy, choose the higher-force option to build the bone beneath it. When it is not, protect that joint and load your other bones in other ways.

Key Takeaways for Bone Health

Impact builds bone: Your bones strengthen in response to forces that are bigger and faster than their everyday routine, which is exactly what impact provides.
Match impact to your fracture risk: The right dose is different for prevention, for osteoporosis without a fracture, and for someone who has already fractured.
Progress gradually: Start with controlled, lower-level impact and build the height and volume over weeks, not days.
Build on a foundation: Impact works best layered onto strength, weight-bearing and balance work, not on its own.
Pain is your signal: Some discomfort with new exercise is normal; pain is not. Modify the exercise or seek guidance.

Beyond High Impact Exercise: A Holistic Approach

While high impact exercise is crucial for bone health, remember that it’s just one component of a comprehensive approach. Balanced nutrition and appropriate medical care are all essential partners to your exercise program.

I encourage you to establish your baseline performance before starting high impact exercises. Record how much high impact exercise you have been doing over the past six months and gradually increase the load level. Advancing too quickly can lead to injury and set backs.

By applying these evidence-based findings to your exercise routine, you’re taking a significant step toward maintaining strong, resilient bones for years to come.

Remember: Before beginning any new exercise program, especially if you have been diagnosed with osteoporosis or have other health concerns, consult with your healthcare provider or a physical therapist who can provide personalized guidance.

Frequently Asked Questions

Is high impact exercise good for osteoporosis?

For most people with osteopenia or osteoporosis, yes — when the impact is matched to their fracture risk and progressed gradually. Impact loads bone in a way that stimulates it to strengthen. The exception is people with a recent spinal fracture, multiple fractures, or very low bone density, who should keep impact gentle and work with a professional. What’s not advisable is jumping straight into heavy, high-intensity impact programs without screening and supervision.

Does high impact exercise increase bone density?

Yes. Bone strengthens in response to dynamic forces that are larger and faster than it is used to, and impact delivers exactly that — which is why it can build density when gentler activity like walking only maintains it. The benefit depends on the load being progressive and matched to what your bones can safely tolerate.

What exercises increase bone density in the spine?

The most effective combine progressive resistance training (advanced to muscle fatigue in roughly 5 to 12 repetitions), controlled impact dosed to your fracture risk, and back-extensor strengthening to support posture. Avoid loaded forward bending of the spine, which increases vertebral fracture risk.

What are modified impact exercises for osteoporosis?

Modified impact reduces the force or risk of a movement while keeping its bone-building benefit — for example a heel drop instead of a jump, stamping in place, hopping while holding a support, exercising on a forgiving surface, or doing fewer, higher-quality impacts. It is the right starting dose for fragile bone and a base you progress from.

Can you do high impact exercise if you have osteoporosis — who should be cautious?

Most people with osteoporosis can include some impact. Those who should be most cautious — and seek professional guidance first — are people with a vertebral compression fracture, multiple low-trauma fractures, very low bone density, marked rounding of the upper back, or poor balance. For them, impact is usually kept gentle while strength, posture and balance come first.

Should I do the LIFTMOR program if I have osteoporosis?

For most people, I would advise caution. LIFTMOR showed bone-density gains, but its participants were carefully screened (fewer than one in five applicants qualified), prepared, and closely supervised. Most people with osteoporosis carry other health conditions that would have excluded them, and I have seen real injuries — including a compression fracture — from people attempting LIFTMOR-style training without that screening and supervision. A graduated, multi-dimensional program matched to your fracture risk is safer and more sustainable.

Stronger bones in just 7 days with my free email course.