Exercise for Strong Bones: What Works and Why

If you’ve been told you have osteoporosis or low bone density, here’s the encouraging part: bone is living tissue, and it still responds to exercise at any age.

Here’s what to aim for. We build most of our bone when we’re young, and that building tapers off by about 30.¹ After that, the goal shifts: hold on to the bone you have, add a little where you can, and prevent the fall that breaks a bone.² The right program helps with all three, and makes you stronger and steadier on your feet. Across 11 studies, people who exercised had about a quarter fewer major osteoporosis fractures.³

Prevention matters even more if something already makes you less steady, such as numbness in your feet from neuropathy, poor vision, or another condition that affects your balance.⁴ Balance and walking practice can help here: in people with neuropathy from diabetes, it improved their balance and their confidence on their feet.⁵ We’ll build it into your program.

Having osteoporosis (bones that have lost density and inner structure, so they break more easily) is no reason to be afraid of loading your bones. They need load to stay strong. The skill is in choosing the right kind and amount for you.

Every exercise plan we write starts from three rules:

1. Treating one problem shouldn’t cause another. A heavy squat might be good for your hips, but not if it flares your knee arthritis or your back. Before we add an exercise for your bones, we look at everything else going on.
2. Know your starting point. We check how well you move, how strong you are, how steady you are, and whether you’ve had any fractures, before we add load. Someone with low bone density and no fractures can often work up to heavier lifting and impact. Someone who has had a spine fracture starts differently and builds up more carefully.⁶
3. Build up gradually, with rest, under supervision. Small steps give us time to see how your body responds, and rest days give bone time to rebuild. Each step up, whether that’s more weight, more impact or a harder balance challenge, should be done under the supervision of a physical therapist, who checks your form and how you respond before the next one.⁶

How bone responds to exercise

Think of the calluses on a gardener’s hands. Skin toughens where it’s rubbed, and only there. Bone works much the same way: it gets thicker and stronger where it’s loaded, and it lets itself thin out where it isn’t. A leg exercise does little for your spine or your wrist, so a good program loads your hips, spine and arms.

The process has a name, mechanotransduction: turning a physical force into a chemical signal. Almost all of bone’s cells are osteocytes, sensors buried in the hard bone and linked by tiny fluid-filled channels.⁷ When you lift, step or stomp, the bone bends very slightly and pushes that fluid past them.⁸ In animal studies, that made osteocytes cut back on sclerostin, a protein that brakes bone building, so the cells that lay down new bone could get to work.⁹ Under a steady push the flow stops and the signal fades.¹⁰

Bone responds to changing forces, like a step or a lift, and a short burst of hard work is enough to start the process. It also gets used to whatever it does every day.¹¹ Walking puts weight through your legs, but on its own it does little to build bone. Swimming¹² and cycling¹³ are great for your heart and do even less, because the water or the bike carries your weight.

The four parts of a bone-strong program

1. Strong: strength training

When a muscle contracts, it pulls on the bone it’s attached to, and that pull is one of the strongest signals for bone to grow. The harder the muscle works, the bigger the pull, so lifting something heavy loads bone more than lifting something light.

That’s why strength training has to keep moving forward, a principle called progressive overload. As you get stronger, the same weight takes less effort, the pull on the bone shrinks, and the signal fades. Adding weight brings the challenge back. Lifting the same light weight forever builds endurance but stops challenging your bones. The goal is to challenge the muscle without injuring the tendons, ligaments and other soft tissues, so don’t work through pain. We’d rather build up slowly than risk an injury.

• How hard: challenging enough that the last few repetitions take real effort, with good form. We set the weight, how much and when to add more with you, based on your assessment.⁶
• Harder doesn’t have to mean heavier: you can also slow the movement down or switch to a one-leg version, like a kickstand deadlift.
• What to train: legs, hips and back first, then the rest of the body.

Strength also builds a reserve. If carrying the groceries takes most of your strength, it’s the kind of job people start to avoid. Get stronger now, and the same bags take less effort, so you keep carrying them for years.

Heavier lifting can go further. In one trial, screened women with low bone density lifted close to their maximum and did jumping drills twice a week, with a coach at every session; their spine bone density rose about 3% in eight months,¹⁴ with no spine fractures.¹⁵ Build toward heavy lifting with a physical therapist rather than on your own.

2. Impact: stomps and heel drops, if your spine allows

Quick, firm impacts send a strong “build” signal, especially to the hips.

• If you haven’t had a spine fracture: impact can become a regular habit, built up a little at a time. We’ll help you set the amount.⁶
• If you’ve had a spine fracture, or several fractures from minor falls: keep impact to about the level of brisk walking, unless a clinician who has assessed you says otherwise.
• If you have heel pain, such as plantar fasciitis, skip stomps and heel drops and tell us. There are other ways to load your hips.
• Wear supportive sneakers for impact work. Socks, slippers and bare feet don’t cushion your heels enough.
• If stomping causes bladder leaks, have your pelvic floor checked and we’ll adjust the impact.

Ready for more? Small jumps. If heel drops and stomps feel easy and you haven’t had a spine fracture, ask us about adding small jumps. Jump just a few inches, land firmly on both feet with your knees slightly bent (not locked, and not sinking into a squat), and jump again right away. The firm landing matters more than the height. In lab tests, women in their 40s doing small repeated jumps like these landed with about 4½ to 5½ times their body weight, above the level thought to be needed to build bone.¹⁶ Those tests measured force, not bone growth, so build up slowly.

Keep lifting, too. In women after menopause, programs that combined impact with strength training helped protect the spine and hip. Jumping on its own didn’t reliably help.¹⁷

3. Steady: balance training to prevent falls

Most broken hips happen in a fall,² so preventing falls is probably just as important as building bone. In a review of 108 trials in people over 60, exercise that challenged balance cut falls by about a quarter. Programs that added strength training probably cut them by about a third.¹⁸

• How it should feel: challenging. If it feels easy, it isn’t training your balance.⁶
• What to practice: standing still on one leg is only part of it. Good balance training also has you shift your weight before a step (as when you climb stairs), stay steady while you move (stepping over things, turning), reach and lean safely, and catch yourself with a quick step after a trip.¹⁹
• If you’ve fallen more than once, or you avoid activities because you’re afraid of falling: you’ll do best with regular, supervised strength and balance work over several months.⁶

Our article Eating for Strong Bones has more on what raises the risk of falling.

4. Straight: back strength and posture

Strong back muscles support the spine and help prevent a rounded upper back. This matters most after a spine fracture.

• Exercises: back extensions and the bird dog, with a neutral spine: back long with its natural curves, no rounding forward, no arching your lower back or cranking your head.
• Form first: we’ll show you how to do these without straining your neck or lower back.

In one study, six months of group spine-strengthening classes reduced upper-back rounding compared with health education.²⁰

Movements to avoid

These movements put extra pressure on the front of the spine bones. With osteoporosis, avoid them, especially if you’ve already had a fracture, and above all a fracture in your spine:

• Bending forward from the waist to lift or pick something up.
• Sit-ups and crunches, including ab machines that curl you forward.
• Toe touches and deep forward folds, such as Pilates roll-ups and forward-bending yoga poses.
• Fast or forceful twisting, especially while bending or holding something, as in a golf swing.

Why we’re firm about this: in a small 1984 Mayo Clinic study of women with spinal osteoporosis, 89% of those given forward-bending exercises had new spine fractures in the years that followed, compared with 16% of those given back-strengthening exercises.²¹ It was a small, older study, so don’t hang too much on the exact numbers, but it points the same way as everything else we know: protect the front of the spine, and strengthen the back.

Do this instead: bend with a hip hinge. Push your hips back, keep your back from rounding and your chest up, and bend your knees as needed.⁶ Gentle, comfortable turning is fine, and so is staying active; we’ll show you how to do everyday tasks this way.

What about weighted vests?

Weighted vests are popular online as a way to build bone while you walk. The evidence so far doesn’t back that up. In a 2025 trial, older adults who were losing weight wore a vest about 7 hours a day for a year and lost about as much hip bone as people who didn’t wear one.²²

Supervised strength training in the same trial didn’t stop that hip bone loss either, which shows how hard weight loss is on bone. If you have low bone density and want to lose weight, talk with us or your doctor first, and don’t let a vest replace the strength, impact and balance work above.

What about yoga, Pilates and exercise classes?

Yoga, Pilates and group classes are good for you, so keep doing the ones you enjoy. On their own, they don’t replace strength training: they don’t work every major muscle group, and they don’t keep getting harder as you get stronger. In one trial, women past menopause with low bone density who did high-intensity strength and impact training for eight months gained about 2% in spine bone density, while a Pilates-based program held about steady.²³ Both groups moved better by the end, so Pilates still earns its place; it just isn’t the bone builder. A simple plan: make strength training a regular anchor, and everything else can be whatever you like. In a class with a weights segment, pick weights that make the last few repetitions hard. If you do yoga or Pilates, skip the forward folds and roll-ups listed above.

Everyday activity counts too. Dancing, pickleball, hiking on uneven trails, yard work and taking the stairs keep you moving in different directions, and that keeps your balance sharp.

What to expect

• Strength and balance improve within weeks. Bone changes slowly: a small gain, roughly 1 to 3% at the hip at most,²⁴ after 8 to 12 months.²⁵ Holding steady is a win too; in one trial, the group that didn’t train lost bone in the same eight months.¹⁴
• A scan can miss real gains: a bone density scan measures how much mineral is there, not the bone’s shape. In the heavy-lifting trial above, hip density barely changed, but the outer shell of the hip bone thickened more than in women doing a light home program, and a thicker shell is harder to break.¹⁴
• Fewer fractures: across 11 studies, people who exercised had about a quarter fewer major osteoporotic fractures, though the best program isn’t pinned down yet.³ Exercise works alongside bone medicine, so keep taking any your doctor prescribes.

That matters, because a broken bone can change how independently you live. In a US study of older adults (average age 84) who broke a hip, about 1 in 4 died within a year.²⁶ Among women in their 70s who had a spine fracture and weren’t taking bone medicine, about 1 in 5 had another within a year.²⁷ Those numbers aren’t a prediction for you. They’re the reason a plan is worth starting now.

When to stop and call us or your doctor

• Sudden, sharp back pain, especially after bending, lifting or a minor fall. This can be a sign of a spine fracture.
• New pain that doesn’t settle within a day or two.
• Dizziness, chest pain or unusual shortness of breath.

Normal muscle soreness for a day or two after a new exercise is expected.