Twice a week, lift a weight heavy enough that the fifth repetition is genuinely hard. Not fifteen light reps. Five heavy ones.
Bone rebuilds in response to high mechanical strain. Light weights and long walks keep you moving, but they rarely reach the load threshold that signals your skeleton to lay down new bone.
The clearest evidence here comes from the LIFTMOR trial, published in the Journal of Bone and Mineral Research in 2018. Researchers took 101 postmenopausal women with low bone mass and ran them through eight months of supervised training.
The program, called high-intensity resistance and impact training, ran twice a week for about thirty minutes. It centered on three heavy compound lifts, the deadlift, the overhead press, and the back squat, worked up to roughly five hard reps near a woman's five-rep maximum.
It also included impact, specifically jumping chin-ups with a controlled drop landing, because bone responds to sudden load in a way that steady effort does not.
The training group gained bone density at the lumbar spine and femoral neck, reporting a spine gain of roughly three percent, while a control group doing lighter home exercise lost ground. Injuries were rare, and the heavy lifting was well tolerated under supervision.
This matters more for you than the general fitness advice suggests. Postmenopausal women lose bone fastest in the years around and after the transition, and this is exactly the population where two-pound dumbbells and walking fail to move the number on a DEXA scan.
So the move is heavy and specific. Work with a qualified coach to build safe form on the deadlift, squat, and overhead press, then progress to a load where five reps is hard, twice a week, adding controlled impact if your clinician clears it.
If you already have osteoporosis, prior spinal fractures, or significant joint issues, get individual clearance before loading heavy, because form and progression have to be supervised.
The protocol has a name, LIFTMOR, and a number, five hard reps twice a week. Bring both to your next training session, because at your stage the weight that feels almost too heavy is the one actually building the skeleton you want at sixty-five.
