Bones are not static scaffolding. They are living tissue that is constantly being broken down and rebuilt, and they respond to how we move and how we eat. For women especially, understanding this process early can make a real difference to how strong we feel for decades to come.
Whether you are in your twenties, chasing toddlers in your thirties, or navigating perimenopause, this guide covers what the research says about building and protecting your bones, and why lifting (yes, real lifting) is one of the best things you can do for them.
Your bone “bank account”: peak bone mass
Think of your skeleton like a savings account. During childhood and adolescence, we make big deposits. According to the NIH Osteoporosis and Related Bone Diseases National Resource Center, most people reach their peak bone mass by their late twenties to around age 30. After that, the balance slowly shifts, and bone breakdown gradually starts to outpace bone building.
The higher your peak bone mass, the more “savings” you have to draw on later. Genetics play a big role, but so do lifestyle factors like physical activity, calcium and vitamin D intake, and avoiding smoking and excess alcohol. That is why bone-strengthening activity is recommended for kids and teens in both the WHO and U.S. physical activity guidelines, and why it is never too early (or too late) to invest.
Menopause and your bones
Estrogen plays an important protective role in bone. As estrogen levels fall during the menopause transition, the rate of bone loss speeds up. The NIH notes that women can lose up to about 20 percent of their bone density in the five to seven years following menopause, which is a big reason osteoporosis is much more common in women than in men.
According to the Bone Health & Osteoporosis Foundation (BHOF), approximately one in two women over age 50 will break a bone because of osteoporosis. We share that not to scare anyone, but because it is a powerful reason to start building habits now. Osteoporosis is often called a “silent” condition because there are usually no symptoms until a fracture happens.
Talk to your provider about screening
The U.S. Preventive Services Task Force recommends osteoporosis screening for women 65 and older, and for younger postmenopausal women at increased risk. If you have risk factors such as early menopause, a family history of hip fracture, low body weight, long-term steroid use, or a previous fracture, ask your healthcare provider whether a bone density (DXA) scan makes sense for you.
How exercise builds bone
Bones adapt to the loads placed on them. When muscles pull on bone and when impact sends forces through the skeleton, bone cells sense that strain and respond by maintaining or building bone. This is why the American College of Sports Medicine’s position stand on physical activity and bone health, along with the Exercise and Sports Science Australia position statement (Beck et al., 2017), emphasize two kinds of exercise:
Progressive resistance training
Lifting weights that are challenging for you, and gradually increasing that challenge over time. Exercises that load the hips and spine, like squats, deadlifts, and overhead presses, are especially relevant for bone.
Impact training
Activities that involve brief, higher-impact forces, such as jumping, skipping, hopping, or stomping. Varied, dynamic loading tends to be more bone-stimulating than repetitive, low-impact activity.
Walking is wonderful for heart health and mood, but on its own it provides a fairly modest, familiar load that may not be enough to substantially improve bone density. Swimming and cycling, while great for fitness, are not weight-bearing. Think of strength and impact work as the bone-specific part of your routine.
What the LIFTMOR trial found
For years, many women with low bone density were advised to avoid heavy lifting out of caution. The LIFTMOR trial (Lifting Intervention For Training Muscle and Osteoporosis Rehabilitation), published by Watson and colleagues in the Journal of Bone and Mineral Research in 2018, challenged that assumption.
The study included 101 postmenopausal women with low bone mass (osteopenia or osteoporosis). One group did an eight-month, twice-weekly, 30-minute supervised high-intensity resistance and impact training program. After an initial period of learning technique with lighter loads, they progressed to five sets of five repetitions at around 80 to 85 percent of their one-rep max in the deadlift, back squat, and overhead press, plus jumping chin-ups with drop landings. The comparison group did a low-intensity, home-based exercise program.
- The high-intensity group improved bone mineral density at the lumbar spine and femoral neck, while the comparison group lost bone at the spine.
- They also improved measures of physical function, including strength and balance-related tests.
- The program was well tolerated, with very few adverse events.
Important context
LIFTMOR participants were carefully screened and every session was closely supervised by qualified exercise professionals who progressed loads gradually. That is very different from jumping into heavy lifts on your own. If you have osteoporosis, a history of fractures, or other health conditions, work with your healthcare provider and a qualified exercise professional to build a program that is right for you.
The takeaway is hopeful: with the right support, bones can respond to challenging training even after menopause. Strength training is not something to fear. It is something to approach thoughtfully.
A beginner bone-friendly strength session
This sample session is designed for healthy women without osteoporosis who are new to strength training. Do it two or three times per week on non-consecutive days. Start with weights that feel manageable and build gradually as your technique becomes solid.
| Exercise | Sets × Reps | Rest | Coaching cues |
|---|---|---|---|
| Goblet squat | 3 × 8–10 | 90 sec | Weight at chest, sit between your heels, stand up tall |
| Dumbbell Romanian deadlift | 3 × 8–10 | 90 sec | Hinge at the hips with a long spine, weights close to the legs |
| Standing dumbbell overhead press | 3 × 8–10 | 90 sec | Ribs down, glutes engaged, press straight up |
| One-arm dumbbell row | 3 × 10 each side | 60 sec | Flat back, pull elbow toward your hip |
| Step-up | 2 × 8 each side | 60 sec | Drive through the heel of the top foot |
| Low-level jumps or heel drops | 3 × 10 | 60 sec | Rise onto toes and drop heels firmly to the floor, or do small two-foot hops with soft knees |
Our women’s strength program walks you through a full progression, including how to increase weight safely over time.
Pregnancy, postpartum, and pelvic floor
If you are pregnant, postpartum, or experience leaking, heaviness, or pelvic pain, impact exercises may not be right for you at the moment. Speak with your provider, and consider seeing a pelvic floor physical therapist. Our pregnancy program page covers safe modifications.
Calcium and vitamin D: the nutrition side
Exercise sends the signal, but bones also need raw materials. The NIH Office of Dietary Supplements lists these Recommended Dietary Allowances for women:
| Age | Calcium (per day) | Vitamin D (per day) |
|---|---|---|
| 14–18 years | 1,300 mg | 600 IU (15 mcg) |
| 19–50 years | 1,000 mg | 600 IU (15 mcg) |
| 51–70 years | 1,200 mg | 600 IU (15 mcg) |
| 71+ years | 1,200 mg | 800 IU (20 mcg) |
| Pregnant or breastfeeding (19–50) | 1,000 mg | 600 IU (15 mcg) |
Food-first sources of calcium
- Milk, yogurt, and cheese (a cup of milk provides roughly 300 mg)
- Calcium-fortified plant milks and juices (check the label)
- Canned sardines or salmon with the soft bones
- Tofu made with calcium sulfate
- Leafy greens like kale, bok choy, and collard greens
- Almonds, white beans, and chia seeds (smaller amounts that still add up)
Vitamin D is harder to get from food alone. It is found in fatty fish, egg yolks, and fortified foods like milk and some cereals, and our bodies also make it from sunlight. If you are wondering whether you need a supplement, ask your healthcare provider, who may check your levels. More is not always better: the NIH notes that very high supplement doses of calcium and vitamin D can cause problems.
Adequate protein also matters for bone and muscle. Find family-friendly ways to build balanced plates on our nutrition page.
Frequently asked questions
I have osteoporosis. Should I avoid lifting?
Not necessarily. Current expert guidance generally encourages appropriate resistance training for people with osteoporosis, but the program should be individualized. Some movements, like loaded spinal flexion (such as weighted sit-ups), may need to be modified. Work with your provider and a qualified professional.
Is it too late to build bone after 50?
Research like LIFTMOR suggests bones can still respond to the right training after menopause. Even maintaining bone density and improving strength and balance, which reduces fall risk, is a meaningful win.
How can I help my daughter build strong bones?
Encourage active play with jumping and running, sports she enjoys, and meals with calcium-rich foods. The teen years are prime time for building bone.
Strong bones, strong future
Bone health is a lifelong story, and every chapter matters. Lift something challenging, add a little impact when it is right for your body, eat to nourish, and keep showing up. Your future self will thank you.
This article is for educational purposes only and is not medical advice. It is researched from and cited to published guidelines and peer-reviewed research. Please consult your healthcare provider before starting a new exercise program or supplement, especially if you have osteoporosis, a history of fractures, or are pregnant or postpartum. See our medical disclaimer.
Sources & further reading
- Watson SL, Weeks BK, Weis LJ, et al. High-intensity resistance and impact training improves bone mineral density and physical function in postmenopausal women with osteopenia and osteoporosis: the LIFTMOR randomized controlled trial. Journal of Bone and Mineral Research, 2018.
- Beck BR, Daly RM, Singh MAF, Taaffe DR. Exercise and Sports Science Australia (ESSA) position statement on exercise prescription for the prevention and management of osteoporosis. Journal of Science and Medicine in Sport, 2017.
- Kohrt WM, Bloomfield SA, Little KD, Nelson ME, Yingling VR. American College of Sports Medicine position stand: physical activity and bone health. Medicine & Science in Sports & Exercise, 2004.
- NIH Office of Dietary Supplements. Calcium: Fact Sheet for Health Professionals and Vitamin D: Fact Sheet for Health Professionals. National Institutes of Health.
- NIH Osteoporosis and Related Bone Diseases National Resource Center. Osteoporosis: Peak Bone Mass in Women. National Institutes of Health.
- Bone Health & Osteoporosis Foundation. Osteoporosis fast facts. BHOF.
- U.S. Preventive Services Task Force. Osteoporosis to Prevent Fractures: Screening. Recommendation Statement, 2018.
- World Health Organization. WHO Guidelines on Physical Activity and Sedentary Behaviour. WHO, 2020.
Mom, designer and founder of Steady & Strong Wellness. Katelyn researches every article from official guidelines and peer-reviewed studies, and always encourages readers to partner with their own healthcare providers.
@steadyandstrongwellness
