Osteoporosis Prevention and Treatment: How Much Force Do Your Bones Need?
And an exercise guide to help you build bone
Understanding Osteoporosis
Osteoporosis is a silent disease because most people don’t know they have it until a bone breaks. The bones slowly become thinner and weaker, and one day something as simple as a slip on the sidewalk or even turning the wrong way in bed can lead to a fracture.
Osteoporosis is far more common than most realize. About one in three women and one in five men over the age of 50 will suffer a fracture caused by osteoporosis. For women, the burden is especially heavy—over a lifetime, they will spend more days in the hospital because of osteoporosis than from breast cancer and heart disease combined.
Typically, when I write a long-form article like this, I put it behind a paywall. However, I felt that this topic needed to be exposed to a broader audience. The statistics regarding disability, morbidity, and mortality around osteoporosis-related fractures are too hard to ignore.
The 1.5 million osteoporotic fractures in the United States each year lead to more than half a million hospitalizations, over 800,000 emergency room encounters, more than 2,600,000 physician office visits, and the placement of nearly 180,000 individuals into nursing homes.
Hip fractures are by far the most devastating type of fracture, accounting for about 300,000 hospitalizations each year. These injuries change lives in an instant.
Within a year of breaking a hip, one in four people will die. Of those who survive, approximately half will never walk independently again, and many will require assistance with everyday activities, such as dressing, bathing, or even getting out of a chair.
This is why osteoporosis matters. It’s not only about thinning bones—it’s about the very real risk of losing independence, mobility, and years of healthy living. Preventing bone loss and even building stronger bone can mean the difference between living on your own terms and relying on others for basic care.
Okay… I’m in… what do I need to do?
To prevent bone loss or build new bone, we need mechanical strain (load) that exceeds the level of everyday activity. Research shows the skeleton responds when loads exceed roughly 3–4 times your body weight (see references below). No, that doesn’t mean you need to exercise with weights that are 3-4x your bodyweight. We are talking about ground reaction forces (GRF). That’s the relative amount of weight or force that your skeleton is exposed to with various activities.
These are the GRFs, strains, or loads that some activities produce on our skeleton:
Walking = ~1.2× body weight
Jogging = ~2–2.5× body weight
Jumping = 4–6× body weight
That’s the threshold or force that your bones notice with those activities. Daily walking is healthy, but on its own, it won’t build new bone. For building(increasing) bone density, we need safe, progressive bouts of jumping, hopping, or resistance training.
To build bone density, we need exercises that create a force of more than 3X our body weight.
Let’s dive into this further.
What Different Activities Do for Bone:
Wolff’s Law: Why Load Matters
Think of your bones like the support branches of a tree. If the branches are never stressed, they get weaker and start to sag. But if the tree is subject to wind, load from leaves, water, etc, they reinforce themselves where it matters most.
That’s essentially Wolff’s Law:
Bones will remodel (produce more bone) in response to the stress placed upon them.
Put too little stress on them (like only walking or sitting all day), and your body decides, “We don’t need as much bone here.” Bone breakdown cells (osteoclasts) take over.
Put enough stress on them (through impact or lifting), and your body says, “Reinforce this area.” Bone-building cells (osteoblasts) lay down new material, making the bone thicker and stronger.
Your bones are always listening.
Light loads (such as walking) tell them, “We can lose some more bone.”
Moderate loads (jogging) say, “Slow the loss.”
Heavy loads (jumping, lifting) shout, “Build more.”
It’s why astronauts lose bone in space (no load at all) and why athletes in sports like gymnastics or volleyball often have the strongest hips and spines.
The Science of Loading (references below)
Mechanostat theory: Bone adapts only when strain surpasses a threshold (Frost, 1987; Turner, 1998).
Impact trials: Brief, high-magnitude, and variable loads stimulate osteogenesis (Turner & Robling, 2003; Nikander et al., 2009).
Impact counts: 40–50 jumps/session, 2–3×/week, improved hip and spine bone density (Heinonen, 1996; Vainionpää, 2006).
Resistance training: High-load lifting (70–85% 1RM) improved spine and hip BMD in women with osteopenia/osteoporosis (Watson et al., 2018).
How Much and How Often? (Research-Based Targets)
Impacts per session: 40–50 high-strain jumps/session
Sessions per week: 2–3
Weekly total: ~100–150 high-impact reps is sufficient for measurable bone density improvements
Plateau effect: More than ~50–60 impacts in one session doesn’t add further benefit- but could increase risk of stress fractures.
Resistance training: 2–3×/week of multi-joint, high-load lifts (squats, deadlifts, overhead press) at 70–85% of your maximum capacity (1RM) improves spine and hip bone density
Taken together, 100–150 targeted impacts, plus 2–3 resistance training sessions per week, appear optimal for stimulating or maintaining bone density.
The HiRIT Program
The HiRIT (High-Intensity Resistance and Impact Training) protocol, tested in the LIFTMOR randomized controlled trial (Watson et al., 2018), provides a proven template for safely applying these principles. I like this program because it combines jumping (such as drop jumps off a box) and resistance training to maximize your bone mineral density growth potential.
Population: Postmenopausal women with low bone mass
Frequency: 2 sessions per week (~30 minutes each)
Resistance Component: 5 barbell lifts (deadlift, squat, overhead press, bench press, chin-ups/rows) at 70–85% of one rep maximum (1RM)
Impact Component: Drop landings from 20–30 cm boxes.
Results:
Increased spine and hip BMD
Improved strength, posture, and physical function
No major adverse events under supervision
This protocol has demonstrated that high-load resistance and moderate impact, performed just twice weekly, can reverse bone loss and restore strength.
What I found interesting was that despite the jumping and intensity, there were no bone stress injuries (BSIs) in the original study on the HiIRT program. This is important. As I often write about, people fear injuries as they age. That’s a natural fear, but it’s not based in fact or science. When your loading program is well-crafted and well-conceived, the risk of injury is very low. Compare that to the very high risks incurred by doing nothing.
Some of you may not be able to start the HiRIT program at its full capacity from the outset. However, you can begin with these exercises in a structured and monitored manner that gradually introduces stressors to your skeleton. Remember, given Wolff’s law… your bones will respond over time. Stress fractures or bone stress injuries occur if we add too much activity too soon, before the bone has a chance to adapt.
A Safe Progression
Phase 1: Foundation (2–4 weeks)
Walk daily and strengthen with bodyweight exercises like squats, step-ups, or resistance bands.
Phase 2: Introduction to Impact (4–6 weeks)
Add two sessions/week of 3×10 low jumps or jumping off a low box or step.
Phase 3: Progression (ongoing)
Advance to 3 sessions/week, 40–50 total impacts.
Add resistance training (squats, lunges, deadlifts).
Phase 4: Maintenance
Vary impact types to prevent plateau.
Maintain resistance work 2–3×/week.
A rate of 100–150 high-load impacts/week is sufficient for most people to stimulate bone growth.
An entire industry has been built to convince perimenopausal women that they need to spend a lot of money on various machines to build bone density. I see these ads often… so, what does the science say about the offerings from these companies? Hint: they’re not great at building new bone. Jumping drills and weight training is better.
What About the Rebounder?
Mini-trampolines—“rebounders”—are often marketed as bone-building tools. They can be helpful to improve some aspects of our fitness… but not our bone density.
Why It Helps
The bounce creates gentle, rhythmic motion that challenges your core, ankles, hips, and legs. Over time, this improves balance, coordination, and lower-body strength—all of which reduce the risk of falling.
Falls are one of the biggest drivers of fractures, so anything that helps you stay upright and steady has real value.
Why It Doesn’t Build Bone
Bones don’t respond to movement alone—they respond to force. And to build new bone, the cells that make new bone need to be subject to forces more than 3X your body weight.
Walking loads your skeleton with about 1.2× your body weight.
Jogging creates 2–2.5×.
Jumping on the ground delivers 4–6×—enough to stimulate bone growth.
On a rebounder, the mat/springs absorb much of the impact. The force of impact that reaches your bones is closer to walking than to ground jumping. That means you’re getting movement and muscle work—but not the high-strain loading needed to trigger new bone formation.
Research studies back this up: rebounder training improves balance, strength, and mobility, but doesn’t change bone density in the hips or spine.
Rebounders are excellent for:
Improving balance and coordination
Building confidence with movement
Supporting strength and mobility
But they won’t build bone density. For that, you need higher-impact exercise (like jumping or hopping on the ground) or supervised heavy resistance training that delivers enough stress to your skeleton.
Think of the rebounder as a stability tool—great for fall prevention, but not a substitute for bone-building loads.
What About Vibration Plates?
You’ve probably seen vibration platforms advertised as a way to strengthen bone with almost no effort. Stand on the plate, let it shake, and supposedly your bones respond as if you’d been jumping or lifting.
The vibrations send tiny, rapid signals through your skeleton. In theory, this mimics the strain bones feel during impact exercise. Some studies have shown very slight improvements in bone density—especially at the hip and spine—in sedentary or frail older adults.
Why They Fall Short
Again… bones respond when the load exceeds about 3–4 times your body weight—the kind of forces generated by jumping, hopping, or heavy resistance training.
On a vibration plate, the actual load transmitted to your skeleton is tiny by comparison:
Standing on the plate: only about 1.1–1.3× body weight
Doing squats or dynamic moves: up to 1.5–2.5× body weight.
That’s closer to walking or light jogging than to the high-impact forces bones need for growth. This explains why vibration plates rarely show meaningful bone density gains in research studies, though they can still improve balance and strength.
Vibration plates are not a substitute for impact or heavy loading. They simply don’t deliver enough force to trigger the remodeling that builds bone. But for people who cannot tolerate high-impact exercise, they can be a safe way to train balance, muscles, and stability—all of which reduce the risk of falls.
Beyond Exercise: Nutrition and Hormones
Exercise and loading are critical for building and maintaining bone—but they aren’t the whole story. Bone health also depends on the presence of the materials needed to build bone and the hormonal signals that regulate its turnover.
Vitamin D
Vitamin D helps your gut absorb calcium and directs it into bone. Without enough, calcium passes right through you. In northern climates or for those who avoid sun exposure, deficiency is common. Blood testing can guide whether supplementation is necessary.
Vitamin K2
K2 acts like a traffic cop for calcium—helping steer it into bone and away from arteries. While research is still emerging, there’s enough evidence to suggest it plays a supportive role in bone strength when combined with vitamin D and calcium.
Calcium
Calcium is the raw material of bone. The best way to get it is through diet—from dairy products, leafy greens, beans, nuts, and fortified foods. Dietary calcium is absorbed more efficiently, better regulated by the body, and comes without the potential risks associated with high-dose supplements. If someone cannot consistently meet their needs with food alone, then supplementation can fill the gap—but food should always be the first line.
Hormone Therapy
For women after menopause, declining estrogen accelerates bone loss. Hormone therapy (HT) is one of the most effective ways to prevent that rapid decline and preserve bone density. It’s right for most people… but it’s not right for everyone—there are risks and benefits to weigh—but it should be part of the conversation with your doctor. Testosterone therapy in men with symptomatic deficiency can have similar protective effects.
Building Bone Density Requires a Combination of:
Exercise loads the skeleton and provides the proper mechanical stimulus.
Vitamin D, K2, and calcium provide the raw materials and guides.
Dietary calcium is best, with supplements as backup.
Hormones supply the signals that keep bone turnover in balance.
Bone strength isn’t built by one element alone—it’s the combination of movement, nutrition, and hormonal health that completes the picture.
Important Note
If you have osteopenia or osteoporosis, begin an exercise program gradually and under professional guidance. A sound, progressive loading program reduces the risk of bone stress injuries (BSIs). Safety and consistency matter more than intensity.
Disclaimer:
This is for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified healthcare provider before beginning any new exercise program, especially if you have any underlying medical conditions, injuries, or concerns. Participation is voluntary and at your own risk.
References
Frost HM. Bone “mass” and the “mechanostat”: a proposal. Anat Rec. 1987;219(1):1–9.
Turner CH. Three rules for bone adaptation to mechanical stimuli. Bone. 1998;23(5):399–407.
Turner CH, Robling AG. Designing exercise regimens to increase bone strength. Exerc Sport Sci Rev. 2003;31(1):45–50.
Nikander R, Sievänen H, Heinonen A, Daly RM, Uusi-Rasi K, Kannus P. Targeted exercise against osteoporosis: a systematic review and meta-analysis. BMC Med. 2009;7:24.
Heinonen A, Kannus P, Sievänen H, et al. Randomised controlled trial of effect of high-impact exercise on selected risk factors for osteoporotic fractures. Lancet. 1996;348(9038):1343–1347.
Vainionpää A, Korpelainen R, Sievänen H, et al. Effect of impact exercise and its intensity on bone geometry at weight-bearing tibia and femur. Bone. 2006;39(5):886–893.
Watson SL, Weeks BK, Weis LJ, Harding AT, Horan SA, Beck BR. High-intensity resistance and impact training improves bone mineral density and physical function in postmenopausal women with osteopenia and osteoporosis: the LIFTMOR randomized controlled trial. J Bone Miner Res. 2018;33(2):211–220.
Thank you for the comprehensive and detailed article with lovely medical illustrations. I used to work for the orthopedic tissue bank at my university and your article is the best I’ve seen so far.
This is the most concise article I have seen. Thank you.