In a 2025 trial, older adults wore a weighted vest about seven hours a day for a full year…
But their hip bone density still went down.
You may have bought a vest to protect your bones. Here’s what the research says a vest can do, what it can’t, and what does load your bones.
Key Takeaways
- Osteoporosis Canada found “little to no evidence” that wearing a weighted vest on a walk or around the house raises your bone density.
- In a 2025 trial, a year of daily vest wear did not protect the hip during weight loss.
- Your bones change when the load is bigger than what they already carry all day, and a vest adds only a few pounds to steps you already take.
- Keep your vest if you like it, but two strength sessions a week with “appropriately challenging” weights come first.
Contents
Does a Weighted Vest Help Osteoporosis?
Probably not much, at least for your bone density. The research so far is thin, and most of it points the same way.
In 2025, Osteoporosis Canada reviewed the evidence on weighted vests. Here’s what the review concluded:
Osteoporosis Canada, “Weighted Vests: Are They Good For Bone Health?”, position statement, September 2025.
The same statement says several studies found vests had no effect on bone density. It also says the few studies that did report a benefit were often flawed.
So the vest you see all over social media has very little behind it, at least for bone.
What a Year-Long Weighted Vest Trial Found
The INVEST trial tested vests and bone for a full year. Most of the people in it were women in their 60s, and every one of them was losing weight on purpose.
That matters, because weight loss after 60 tends to cost some bone. The researchers wanted to know whether wearing the lost pounds back in a vest would protect the hip:
Beavers KM et al., JAMA Network Open, 2025. PMID 40540267.
This trial was about weight loss, so it doesn’t answer every question about vests. But the people in it wore their vests for most of the day, every day, for a year. The vest still didn’t protect the hip.
Look closely at the lifting group, too. They used moderate weights for 10 to 12 reps a set, and their bones didn’t respond either.
Why a Vest on a Walk Isn’t Enough Load
Your bones adapt to the load they carry every day. Bone density changes when the load is bigger than that.
A walk adds only a little more than your own body weight with each step. Stephen was asked whether three miles of walking a day is enough for your bones, and he answered: “It’s not enough stimulus to change your bone density by a significant degree.”
A vest adds a few pounds to those same steps. Osteoporosis Canada uses 3% of your body weight as its example of a low vest weight.
A few extra pounds on a walk doesn’t do much of either. A dumbbell or barbell you can only lift five times does both.
What Does Load Your Bones
The best-known trial in women with low bone density tested exactly the kind of load a vest can’t give you:
Watson SL et al., Journal of Bone and Mineral Research, 2018. PMID 28975661.
Those women weren’t lifting “heavy” on day one. They worked up to that level over months, and the screening, coaching and supervision made it work.
LIFTMOR and INVEST were different trials with different people, so they don’t compare directly. But the load was very different. One group lifted a weight they could manage about 5 times. The other lifted one they could manage 10 to 12 times.
Is a Weighted Vest Safe for You?
A light vest probably carries little risk. Osteoporosis Canada says the risk of injury is probably low when the vest weight is low, around 3% of your body weight, and that discomfort, fatigue and injury risk may rise as the weight goes up.
The statement also names two cautions:
- A vest can throw off your balance.
- A vest adds load to your spine, which may not suit you if you have arthritis in your spine or a disc injury.
Your doctor or physical therapist knows your spine and your bone density result. So their advice on a vest comes first.
Should You Keep Wearing Yours?
Sure, if you like it. A vest makes a walk more of a workout, and researchers who study vests say one may help with balance.
Just don’t count on the vest to protect your bones. That job belongs to strength training, twice a week, with weights that are “appropriately challenging” for you today and go up as tolerated.
So keep the vest for your walks. Then put your real effort into the two sessions a week that load your bones.
Keep Reading
Where to Start in Timonium
There’s no weighted vest program at 29 Again, and there’s no osteoporosis workout either. Your program gets built from how you move.
That begins with the Smart Start, a screening of how you move before anything gets loaded. It goes over your health history and your exercise history too, and it’s part of the free 1-week trial at 29 Again Custom Fitness in Timonium: the screen plus up to two coached sessions.
After that, we train twice a week on a program written around your own screen, and the weight goes up as tolerated.