How is this different from just lifting weights at a gym?
Here's the point
The main differences are how the force is applied and how often you do it. Instead of lifting external weights, you push against a device that doesn't move, so your own body determines how much force you generate — and sessions are brief (about 10 minutes) and only once a week, rather than the more frequent sessions typical of gym-based weight training.
With gym weights or machines, you move an external load through a range of motion, and you control how much weight to add. With this type of equipment, the devices are isometric — you push against a resistance that doesn't move. Because you're generating the force through your own musculoskeletal system, your body's own protective mechanisms, like the Golgi tendon organ, pain receptors, and joint angle limits, help keep the effort within what your tissues can handle.
Sessions are also structured differently. A typical session is about 10 minutes, once a week, rather than the multiple weekly workouts common in gym training. The idea is that bone responds to the peak force applied in a brief moment, not to how long or how often you train. The actual process of adapting happens over weeks to months afterward, and more frequent loading isn't assumed to speed that up.
There's also a focus on specific skeletal regions. Four different devices are used to target areas like the hip and spine, chest and rib cage, upper extremities, and lower extremities, reflecting the idea that bone adapts locally to where force is applied, rather than relying on general full-body resistance training.
It's worth being clear that this approach shouldn't be understood as a guaranteed fix. Published research has looked at bone mineral density changes at the hip and spine in postmenopausal women using this type of axial loading device, and results have been encouraging, but individual results vary and research is ongoing.
Know these words
Osteogenic loading means applying brief, high, muscle-generated force to your skeleton in a way that's strong enough…
The Golgi tendon organ is a sensor in your tendons that detects how much force your muscles are producing and helps…
Mechanotransduction is how bone cells sense physical force and turn it into chemical signals that tell bone to adapt.
Wolff's Law says your bones adapt to the loads you put on them, getting stronger with use and losing density when…
Resistance training is exercise where your muscles work against weight or resistance, like squats, deadlifts, or…
Bone mineral density (BMD) measures how much mineral is packed into your bones, usually estimated with a DEXA scan,…
How sure is this?
Graded Strong Clinical Evidence: Supported by multiple well-designed clinical studies in humans. Read each study with its grade in mind. One study is a piece of the picture, not the whole of it.
The lessons behind this answer
More on exercise and loading
Yes, there's real science behind the idea that bone responds to mechanical force — it's not just a theory in the casual sense. It started over 130 years ago with a German surgeon's observations, and has since been refined by modern researchers who've worked out the cellular and biological mechanisms behind it.
Read the full answer →Your bones actually have their own sensing system built right in. Buried deep inside bone tissue are cells called osteocytes — by far the most numerous cells in your skeleton — and their whole job is to detect mechanical force, like the kind created when you move, bear weight, or put strain through a bone.
Read the full answer →When you push on bone, it actually bends very slightly — far too little to see, but enough at the microscopic level to squeeze fluid through tiny channels inside the bone. That fluid movement is what your bone cells sense, and it's the very first step in a chain of signals that tells your bone "you're using me."
Read the full answer →Pushing hard against a machine creates a strong, brief mechanical load on your skeleton. Your bones contain sensor cells that detect this load as fluid movement around them, and that signal tells bone-building cells to get to work, while slowing down the cells that break bone down. Over time, repeated signals like this are part of how bone tissue remodels itself.
Read the full answer →Walking is a familiar, repetitive movement, and your skeleton has adapted to it long ago. Because the forces involved are ones your bones already handle hundreds of times a day, your body treats walking as "maintenance" activity rather than a signal to build new bone. To trigger new bone formation, loading generally needs to be higher in magnitude, applied quickly, come from an unusual direction, and be brief with rest in between.
Read the full answer →Have a question that isn't here? Ask us at your next visit, or ask our AI bone health advisor.
Education only, not medical advice. Decisions about tests, medications and treatment belong with your own doctor. OsteoStrong does not diagnose, treat or cure any disease.
