Today we’re learning to train bone density. Why? 1 in 3 women and 1 in 5 men will develop osteoporosis. Women will spend more time in a hospital for osteoporosis-related fractures than for breast cancer and heart disease combined. 1 in 5 people who fracture their hip ( Men and Women) die within a year, and 50% are never functionally independent again. Those are sobering statistics.

My point is… Regardless of your sex, your bone density matters. A lot.

You should start building bone density early and keep building. It’s much harder to play catch-up. But it’s never too late to start. Even if you already have osteoporosis.

Not enough people have DEXA scans to determine their bone density. Most people find out they have osteoporosis the same way they find out they have a lot of things in medicine: something breaks. A wrist fracture after a minor fall. A vertebra fracture after lifting something that shouldn’t have been a problem. A hip fracture that changes your life in a moment.

Your skeleton is living tissue, constantly remodeling itself in response to the demands you place on it. Bone is not inert. Skeletal biology is responsive and will always respond, regardless of your age. Most people in their 40s and early 50s are not loading their skeletons anywhere near the threshold required to maintain bone density, let alone build it, and most of them have no idea.

There is a downloadable guide at the end to take to the gym with you.

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Why Your 10-Pound Dumbbell Is Not Enough

Bone responds to mechanical load. This is Wolff’s Law. Your osteoblasts, the cells that build new bone, are activated by strain, and below a certain threshold, they are simply not activated. Above it, they laid down new material. Your skeleton is always looking for a specific signal.

If you’re not interested in the science behind these recommendtions you can skip down to the 6 Exercises section.

This force or strain threshold matters. Research shows that to stimulate new bone formation, the skeleton needs to experience ground reaction forces of roughly 3 to 4 times your body weight. No, this is not the weight you need to lift. It is the total force your skeleton absorbs during a given activity, and the difference between various activities can be dramatic.

Walking produces about 1.2 times your body weight, which is healthy but nowhere near sufficient to build bone. Jogging produces about 2 to 2.5 times the force, which helps slow loss, but still falls short at most skeletal sites. Jumping produces 4 to 6 times body weight and is above the threshold, giving your osteoblasts the signal they need. Heavy resistance training at 70 to 85 percent of your one-rep maximum (I’ll explain) produces the necessary force for the spine and hip, which is why heavy resistance training is the cornerstone of nearly every evidence-based bone-building protocol.

Your 10-pound dumbbell curl does not come close to any of those thresholds. Neither does the rebounder your neighbor swears by, because the mat absorbs the impact and reduces the ground reaction force to something closer to walking. It is a useful balance tool and has real value for fall prevention. But it will not build bone.

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You do not need to do a large volume of high-load work to get the signal to start building. You need enough, done consistently, over time.

The Liftmor Study

The LIFTMOR trial, published in the Journal of Bone and Mineral Research in 2018, is a landmark study in this space. Watson and colleagues randomized postmenopausal women with low bone mass to either a high-intensity resistance-and-impact training program, called HiRIT, or a low-intensity home exercise program. The HiRIT group trained twice a week for 30 minutes each session. The exercises were heavy and supervised.

The HiRIT group showed meaningful improvements in lumbar spine and femoral neck bone mineral density. They also showed improvements in strength, posture, and functional performance. The low-intensity group showed no meaningful change in bone density.

This is important because many of you with osteoporosis fear heavy weightlifting. Despite heavy loading, jump landings, and training women who already had compromised bone mass, there were no bone stress injuries (fractures) in the HiRIT group.

A well-designed, supervised, and progressively loaded program has a very low risk of causing fractures. Fragility causes fractures, and the fear of loading is itself a risk factor for the fragility that produces them. This is very important. Fear pervades most discussions about exercising people with osteoporosis or osteopenia. That fear will result in less loading and worsening bone loss. The implications and risks of the loss of bone mass are far worse than the risk of fracture from performing these exercises.

The broader literature adds an important point on dosing: 40 to 50 high-impact repetitions per session, two to three times per week, is sufficient to drive measurable improvements in hip and spine bone density. Beyond 50 to 60 impacts per session, the benefit plateaus, and the injury risk begins to climb. More loading is not always better loading.

“I Can’t Lift Heavy — I Have Osteoporosis”

I see this everywhere online, and I understand where it comes from. If your bones are already fragile, the idea of loading them heavily feels like exactly the wrong thing to do. It is an intuitive fear, and it is almost completely backwards.

The fear assumes that the bone is so fragile that additional load will break it. The data actually show that the bone became fragile because it was not loaded enough. The solution to that problem is not to continue not loading it. The skeleton does not strengthen through protection. It strengthens through demand.

The LIFTMOR trial enrolled postmenopausal women who already had osteopenia or osteoporosis, women whose bones were already compromised, and put them through a high-intensity resistance and impact program twice a week for eight months. No bone stress injuries. No fractures. Meaningful improvements in bone density, strength, and function.

The risk calculation is also worth stating plainly. A hip fracture in an older adult carries a one-year mortality rate of roughly 25 percent. Half of those who survive never walk independently again. That is the cost of fragility. The risk of a well-supervised, progressively loaded strength program is a muscle strain or a bruise.

These are not equivalent risks, and treating them as equivalent, as avoidance does, is not caution. It is a decision to accept the larger risk in order to avoid the smaller one.

Lift heavy enough to matter. Progress gradually. Get a professional to guide you on performing the exercises and progressing them.

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The 6 Exercises To Build Bone Density

The LIFTMOR protocol uses five barbell lifts and one impact exercise. Together they load the sites most at risk in osteoporosis, the lumbar spine, the femoral neck, and the wrist, while also building the strength, balance, and coordination that reduce fall risk.

I will show demonstration videos… BUT— if you are new to them, you should have someone teach them to you and supervise you! As I mentioned, the Liftmor protocol uses 80-85% of the weight you can do once. That’s a heavy lift. You need to be trained to do them properly to avoid injuries.

1. Deadlift

The deadlift loads the posterior chain, spine, hips, and femoral neck with significant axial force. It is one of the most effective exercises for spinal bone density. Technique matters here more than almost anywhere else. Learn it well before loading it heavily.

2. Back Squat

The squat loads the lumbar spine and the hip simultaneously, and it trains lower-body strength that helps protect the hip during a fall. The bar position on the upper back creates the compressive spinal load that drives osteogenesis at that site.

3. Overhead Press

The overhead press loads the spine through axial compression while also training the shoulder girdle and upper back. Posture and spinal extension are improved. For women who are losing height due to vertebral changes, this matters. These can be done with dumbbells, too.

4. Bench Press (or Incline Press)

The bench press loads the upper body and trains the pressing musculature that helps break a fall with the arms. It also contributes to wrist loading, one of the most common sites of osteoporotic fractures.

5. Chin-Up or Supported Row

Pull strength is chronically undertrained and critically important. The chin-up or a heavy-supported row loads the spine through traction and builds the back musculature that maintains upright posture as the years pass.

6. Drop Landing (Box Jump Landing)

This is the impact component. Stepping off a low box, 8-12 inches, and landing with control generates a ground reaction force of 4 to 6 times body weight. This is the signal bone needs, and no amount of walking or light resistance work provides. The key is control on landing, soft knees, hips back, absorbing the force rather than collapsing into it.

What Weight to Use, and How to Find Your Starting Point

The LIFTMOR protocol used loads at 80-85% of one-rep maximum (1RM). You do not need to test a true one-rep max to get started. Find a weight you can lift for 5 repetitions with good form, but not 6. That is approximately 85-87% of your 1RM. If you can do 8 repetitions before form breaks down, you are at roughly 80 percent. Use that as your working range and build from there.

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How to Start, and How to Progress

Again, please work with a professional to learn these exercises well.

Weeks 1 to 4: Foundation

Bodyweight and light barbell work. Learn the movement patterns. Establish hip hinge mechanics, squat depth, and overhead positioning. Add low box step-downs, 2 sets of 10, twice per week.

Weeks 4 to 8: Introduction to Load

Begin adding weight to each lift, aiming for 3 sets of 5 repetitions at a weight that is challenging but technically clean. Add drop landings from a low step, 3 sets of 10, twice per week.

Weeks 8 and Beyond: Progressive Overload

Add weight to the bar when you can complete all sets with solid form. Aim for 2 sessions per week, 30 to 45 minutes each, following the LIFTMOR structure. Keep drop landings at 40-50 total reps per session. Progress the box height gradually.

The program does not need to be complicated. Two sessions per week, six movements, progressive loading over months, and the consistency to keep showing up are the variables that determine the outcome more than any others.

A Note on Professional Guidance

If you have osteopenia or osteoporosis, or if you have never trained with heavy barbells, start with a physical therapist or certified strength coach who understands bone health. The program is not dangerous when properly taught and progressively loaded. It can be dangerous when ego overrides technique. A few sessions to establish form are worth considerably more than months of training with poor mechanics.

If you are healthy and have been lifting for years, you are probably already doing most of this. The question is whether you are loading it heavily enough. Lightweight movement, which has been moved many times, does not provide the signal your skeleton needs. Heavy weight moved well, a few times, twice a week, does.

Your bones are listening. Give them something worth responding to.

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For the full science behind bone loading, Wolff’s Law, ground reaction forces, nutrition, hormones, and what the rebounder and vibration plate research actually shows, read my earlier deep-dive here: Osteoporosis Prevention and Treatment.

Disclaimer: This is for informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician before beginning a new exercise program, particularly if you have a history of fracture, osteoporosis, or other musculoskeletal conditions. Use a professional to guide you through the Liftmor protocol.

For subscribers: Here is a downloadable guide you can bring to the gym or share with the professional guiding you.

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