Strength training with osteoporosis: what's safe and what to skip

If you've been told you have osteopenia or osteoporosis, someone has probably also told you to be careful. Fair. But "careful" has quietly turned into "don't lift anything heavy," and for most women that advice is backwards.

Bones respond to load the way muscles do. Give them a reason to get stronger and they adapt. Take the reason away and they don't. The trick is giving them that reason safely.

Is strength training safe with osteoporosis?

For most women, yes, when it's progressive, supervised, and cleared by your doctor. The International Osteoporosis Foundation states plainly that progressive resistance training is safe for people with osteoporosis (IOF).

The danger usually isn't the lifting itself. It's specific movements done badly, and loads that jump too fast. Both of those are solved by coaching, which is why the trials that show the best results were supervised.

What did the LIFTMOR trial find?

Heavy, supervised lifting improved bone density in postmenopausal women with low bone mass, with no significant adverse events reported. That's the headline from LIFTMOR, the trial most people in this field point to (JBMR, 2018).

The setup: 101 women averaging about 65 years old, all with T-scores below -1.0 (low bone mass). Half did 8 months of twice-weekly, 30-minute supervised sessions at high intensity, 5 sets of 5 reps above 85% of their one-rep max. The other half did a low-intensity home program.

Two 30-minute sessions a week is 1 hour out of 168. For a spine-density gap of ~4 percentage points between the groups, that's about as good a trade as exists in fitness.

Two honest caveats. These women were screened, started gradually, and were coached on every rep. And 85% of a one-rep max is a destination you build toward over weeks.

What exercises should you avoid with osteoporosis?

Skip loaded forward bending of the spine and powerful twisting. The IOF specifically advises avoiding trunk flexion exercise because it may increase spine fracture risk, and avoiding powerful twisting movements of the trunk.

In practice that means no crunches, no sit-ups, no toe touches, no rounded-back lifting, and no fast rotational moves like golf-swing drills with weights. Deep forward bends while carrying something heavy, like lifting a full laundry basket off the floor with a rounded back, fall in the same bucket. Trunk extension and stabilization exercises are generally considered the safer core options.

What exercises are good for bone density?

Two kinds: weight-bearing exercise and muscle-strengthening exercise. The Bone Health and Osteoporosis Foundation recommends both (BHOF).

• Weight-bearing: brisk walking, stair climbing, hiking, and if your doctor allows it, higher-impact work like jogging or jumping
• Strengthening: squats or leg press, hip hinges done with a flat back, rows and other pulling, presses, carries
• Balance work, which the IOF calls highly recommended alongside strengthening, because the best fracture is the one where you never fall

One thing that surprises people: BHOF notes that biking and swimming aren't weight-bearing, so they don't help your bones much. Keep them if you love them, and add something that loads your skeleton.

How should you start lifting with low bone density?

Get your doctor's okay, start lighter than you think you need to, and progress slowly with someone watching your form. The first month is about learning the movements. Testing limits can wait.

1. Bring your latest bone density results and any restrictions to your first session.
2. Learn the hip hinge first. Lifting with a flat back is the single most protective skill.
3. Start with loads that leave 3 to 4 reps in the tank, then add weight in small steps.
4. Add balance work every session, even 5 minutes.
5. Train twice a week and keep it boring. Consistency over months is what moves bone.

If you've never lifted at all, the first month is laid out in strength training after 50 when you've never lifted.

Why does muscle matter for bones too?

Because muscle is what pulls on bone, protects joints, and keeps you upright when you trip. Losing it raises your fall risk at the same time bone density is dropping.

The Office on Women's Health puts natural muscle loss at about 3 to 5% per decade starting around age 30, becoming more noticeable by 60 (womenshealth.gov). Protein matters here too. I broke down the numbers in how much protein women over 40 actually need.

When should you not train without a doctor first?

If you've had a recent fracture, especially of the spine or hip, have very low bone density, or have other conditions like heart disease or uncontrolled blood pressure. Get specific clearance and ask what's off-limits.

A good coach programs around your doctor's guidance. That goes for menopause-related changes too: how much strength training you need in menopause covers the general weekly targets.

Getting help in Flower Mound

If you've been told to be careful and nobody has shown you what careful lifting actually looks like, that's exactly the gap I fill. Here's how training for women over 40 works at my studio.

One pitch. The free 6-Week Challenge starts with a body-composition scan, and every session is coached rep by rep. Bring your bone density results to the intro visit and we'll build the plan around them.