Understanding Osteoporosis: Beginner's Guide

Why Catching Bone Loss Early Could Save You From a Serious Fracture

Osteoporosis is a disease that weakens bones, making them more likely to break. It causes no pain and gives no warning signs, so most people don't know they have it until a bone scan finds it — or, less ideally, until a fracture does. Doctors call it a "silent disease" because it can develop slowly over years without any symptoms you can feel.

Here is a quick summary of what you need to know:

• What it is: A disease in which bones lose density (strength and thickness), making them weak and fragile
• Who it affects: About 1 in 5 women and 1 in 20 men over age 50, according to the National Institutes of Health
• Why it matters: Around half of women over 50 will break a bone because of osteoporosis in their lifetime
• How it's detected: A painless scan called a DEXA scan (an X-ray that measures how strong your bones are) is the standard test
• What you can do: Exercise, nutrition, and medication can all slow bone loss and lower your risk of breaking a bone

You may have just gotten a DEXA scan result you don't fully understand. Or a doctor mentioned your T-score (a number that shows how your bone density compares to a healthy young adult). Or someone you care for had a fall, and now you're wondering if their bones are at risk.

Whatever brought you here, this guide will walk you through everything in plain language. No medical degree required.

For more bone health basics, see our Bone Health 101: Osteoporosis Facts & Tips.

Key terms to know:

• DEXA T-score fracture risk
• When start osteoporosis treatment
• How menopause causes osteoporosis

Understanding Osteoporosis: What Happens to Your Bones?

To understand how osteoporosis develops, it helps to look inside your bones. Your bones are not hard, dead objects. They are living tissues that constantly change.

Your body is always performing a process called bone remodeling. This is a continuous balancing act where old bone is removed and new bone is put in its place. Two main types of cells do this work:

• Osteoclasts: These cells break down and clear away old, worn-out bone.
• Osteoblasts: These cells lay down new bone tissue to keep your skeleton strong.

When you are young, your osteoblasts work faster than your osteoclasts. You build more bone than you lose. Most people reach their peak bone mass, which is the strongest and densest their bones will ever be, around age 30. Think of peak bone mass as a "bone bank account." The more bone you build in your youth, the more you have saved up for later in life.

After age 35, the balance shifts. Your body begins to break down old bone slightly faster than it can replace it, and that slow, steady loss is what eventually changes the internal structure of the bone itself.

To see what that change looks like, picture healthy bone as a strong honeycomb with small, tight spaces. As bone loss adds up, those honeycomb spaces grow larger and emptier, and the outer shell of the bone grows thinner too. The result is bone that's fragile and easily broken.

You can learn more about this biological process from the Osteoporosis Causes, Risk Factors, & Symptoms | NIAMS resource.

Causes, Symptoms, and How Doctors Diagnose Bone Loss

Because bone loss happens deep inside the body, osteoporosis has no early symptoms. You cannot feel your bones getting weaker. However, as the disease reaches an advanced stage, you might notice physical warning signs.

These later signs can include:

• Loss of height: Some height loss is a normal part of aging, but losing one to two inches or more over a relatively short time can be a sign of spinal compression from osteoporosis, and is worth mentioning to your doctor.
• Stooped posture: A curved upper back, sometimes called a dowager's hump, can have several causes, but in osteoporosis it happens when weakened spine bones gradually compress.
• Back pain: Most back pain is not caused by osteoporosis, but new, persistent, or unexplained back pain is worth discussing with a clinician, especially if you have height loss or fracture risk factors.
• Fragility fractures: Breaking a bone from a minor incident, such as a slip from standing height, bending over to make a bed, or even a strong cough, is a hallmark of weakened bone rather than a normal outcome of everyday activity.

To find out if you have bone loss before a break occurs, doctors use a dual-energy X-ray absorptiometry scan, or a DEXA scan. This is a quick, painless imaging test that uses very low-level X-rays to measure the mineral content in your bones, usually at your hip and spine.

The scan provides a few different numbers:

• T-score: This compares your bone density to that of a healthy 30-year-old. It is the primary number used to diagnose osteoporosis or its precursor, osteopenia.
• Z-score: This compares your bone density to other people of your same age, gender, and ethnic background. If this number is unusually low, your doctor may look for an underlying medical condition causing the bone loss.
• FRAX score: This is a tool that combines your DEXA results with your personal health history to estimate your percentage chance of breaking a bone over the next ten years.

For a deeper dive into these measurements, read our guides on Interpreting DEXA Scan Results and How to Interpret Bone Density.

Osteoporosis Risks in Men and Women

While anyone can develop osteoporosis, women face a much higher risk than men. In fact, about 80 percent of people with osteoporosis are women.

The main reason for this difference is estrogen. Estrogen is a hormone that acts like a protective shield for your bones by slowing down the osteoclasts (the cells that break down bone) and helping your body maintain a healthy balance of bone remodeling. During menopause, estrogen levels drop sharply. Without this protective shield, women can lose up to 20 percent of their bone density in the five to seven years following menopause. Thin women often lose bone mass even faster than overweight individuals.

Men also lose bone density as they age, but their risk is lower because they naturally start with larger, thicker bones. They also experience a more gradual decline in testosterone, which helps protect bones — creating a slow decline over decades, rather than the sudden drop in hormones that women experience during menopause.

For more information on this connection, read How Menopause Affects Bones and How Menopause Causes Osteoporosis.

Medical Conditions and Medications That Weaken Bones

Sometimes, bone loss is caused by a specific medical condition or a medication. This is known as secondary osteoporosis.

Certain medications can interfere with how your body builds or maintains bone. The most common culprits are corticosteroids, such as prednisone, which are used to treat conditions like asthma, rheumatoid arthritis, and lupus. Taking these medications for more than a few months can seriously weaken your bones. Other medications linked to bone loss include proton pump inhibitors (common heartburn drugs), certain antidepressants (SSRIs), some anti-seizure medications, and cancer treatments such as aromatase inhibitors. Taking too much thyroid hormone medication can also accelerate bone loss.

Medical conditions that can lead to secondary osteoporosis include:

• Overactive thyroid (hyperthyroidism) or overactive parathyroid glands
• Diabetes (type 1 and type 2)
• Digestive diseases that prevent your body from absorbing nutrients, such as celiac disease or inflammatory bowel disease
• Chronic kidney or liver disease
• Rheumatoid arthritis
• Eating disorders such as anorexia nervosa
• Premature menopause (before age 40)
• Vitamin D deficiency

To learn more about how secondary factors impact bone health, read How Menopause Causes Osteoporosis 2.

T-Scores and What They Mean for Your Fracture Risk

Your T-score is the standard way to understand how strong your bones are. The lower your score, the higher your risk of breaking a bone.

If your T-score is between -1.0 and -2.5, you have osteopenia. This means your bones are thinner than normal, but you do not have osteoporosis yet. Think of osteopenia as a yellow light. It is an early warning sign that tells you to start taking protective steps before the condition progresses.

A T-score of -2.5 or lower means you have osteoporosis. At this level, your bones have lost significant strength, and the risk of a fracture from a minor fall increases dramatically.

To learn more about how your score translates to real-world safety, read about DEXA T-Score & Fracture Risk.

Medical Treatments and Medications for Bone Loss

If you are diagnosed with osteoporosis, your doctor may recommend prescription medications to help protect your bones. These medications fall into two main categories:

• Antiresorptive medications: These medicines slow the cells that break down bone, helping you hold onto the bone density you already have. The most common type is a bisphosphonate, which may be taken as a weekly pill or given as an occasional IV infusion. Another option is a twice-yearly injection that also slows bone breakdown.
• Anabolic medications: These are bone-building medicines that signal your body to create new bone tissue. Doctors usually reserve them for people at higher fracture risk, such as those with very low T-scores or a prior fragility fracture. They are typically given as daily or monthly injections for a limited treatment period.

Because some osteoporosis medications can stay in your body for a long time, doctors sometimes recommend a "drug holiday." This is a planned break from your medication after a few years of treatment. It helps reduce the risk of very rare, long-term side effects while still keeping your bones protected.

To learn more about when these medical options are appropriate, check out our guide on When to Start Osteoporosis Treatment.

How to Protect Your Bones Through Exercise and Nutrition

Medication is only one part of the solution. You can actively support your skeleton by focus-firing on two lifestyle pillars: exercise and nutrition.

To make a bone stronger, you must put a physical load on it. This is called an osteogenic load, which simply means a physical force heavy enough to signal your osteoblasts to build new bone.

Your bones adapt to the stress you place on them. If you do not challenge them, they will not grow stronger. By combining progressive resistance training with a bone-healthy diet, you can give your body the exact tools it needs to maintain and even improve its skeletal strength.

The Best Exercises to Build Bone Strength and Prevent Falls

When it comes to exercise for bone health, not all movements are equal. Light activities like walking, stretching, or using light resistance bands are wonderful for your heart and joint mobility, but they do not create enough of a load to build new bone.

To trigger bone growth, you need progressive resistance training. This means lifting heavier weights for a lower number of repetitions. Research suggests that lifting weights that are about 75 to 85 percent of the maximum weight you can lift once is highly effective for building bone. Aim to train at least two to three times per week for the best results.

To protect your hip and spine, focus on large compound movements. These are exercises that work multiple joints and muscle groups at the same time:

• Squats and lunges: These load the hips and thighs.
• Hip hinges (like Romanian deadlifts): This is where you bend forward at your hips while keeping your back long and straight, rather than rounding your spine. This safely strengthens your lower back and glutes.
• Overhead press and pushing movements: These load the spine and wrists, helping protect two of the most common fracture sites.

Power training is also vital. Power is your ability to move a force quickly. It is what allows you to react fast enough to catch yourself if you stumble. When safe and cleared by a professional, power moves like gentle hopping or stamping can help stimulate bone growth.

Finally, fall prevention is essential. Since most hip fractures are caused by a fall, balance training is a lifesaver. Start with static balance, which means holding a steady position in place, like standing on one leg. As you improve, move to dynamic balance, which involves staying steady while moving, such as stepping over obstacles.

For safe movement ideas, explore the Best Osteoporosis Exercises and learn more about Strength Training and Osteoporosis.

Essential Nutrients and Foods for Stronger Bones

Your body cannot build strong bones without the proper raw materials. A bone-healthy diet requires several key nutrients:

• Calcium: This is the main mineral that makes up your bones. Women over 50 and men over 70 need 1,200 milligrams of calcium daily. It is best to get this from food first. Great sources include dairy products, leafy greens, and calcium-fortified foods.
• Vitamin D3: Your body cannot absorb calcium from your food without vitamin D. Vitamin D3 is the preferred form because it is highly active in the body. Aim for 800 to 1,000 international units daily.
• Magnesium: This mineral helps convert vitamin D into its active form so it can do its job.
• Vitamin K2: This acts like a traffic cop, directing calcium out of your bloodstream and directly into your bones where it belongs.

To learn how to structure your meals for maximum bone strength, read our resources on a Diet to Increase Bone Density, Bone Building Foods, and Best Foods for Bones.

For specific lists of what to eat, see:

• Calcium-Rich Foods
• Magnesium for Bone Density
• Vitamin K2 for Bone Density
• Supplements for Bone Health and Bone Density
• Essential Nutrients for Bone Health
• 9 Ways to Support Stronger Bones from a Nutritionist

Frequently Asked Questions About Osteoporosis

When should I see a doctor about my bone density?

You should talk to your doctor about getting a DEXA scan if you are a woman age 65 or older, or a man age 70 or older. You should ask for a scan earlier if you have major risk factors, such as a family history of hip fractures, a personal history of breaking a bone after age 50, or if you have taken corticosteroid medications for several months.

Can you rebuild bone density after age 65?

Yes. While you cannot easily rebuild the bone density of a 20-year-old, research shows that older adults can improve their bone strength. You can achieve this through a combination of heavy progressive resistance training, adequate calcium and vitamin D3 intake, and, when necessary, bone-building anabolic medications prescribed by your doctor.

Does Medicare cover bone density scans and treatments?

Yes, Medicare covers preventive bone density scans once every 24 months for qualified individuals, including estrogen-deficient women at risk for osteoporosis, people with vertebral abnormalities, and those taking long-term steroid medications. Medicare may cover scans more frequently if medically necessary. It also covers many standard osteoporosis medications under Part D or Part B, depending on how the drug is administered.

You can review specific guidelines on the Medicare Bone Mass Measurements Coverage | Medicare.gov page.

Your Next Steps Toward Stronger Bones

Understanding osteoporosis is the first step toward protecting your independence. While a diagnosis of osteopenia or osteoporosis can feel overwhelming, your bones are living tissue. They can adapt, strengthen, and improve at any age when given the right support.

If you want a clear, step-by-step plan to protect your skeleton, check out Groove's Osteoporosis Starter Guide.

For personalized support, Groove Health offers a Medicare-covered bone health and exercise program. This program directly translates clinical bone science into a practical, home-based care model. Every member is paired with a physical therapist who designs a personalized, progressive exercise plan specifically tailored to build bone strength and improve balance safely at home. By focusing on targeted, home-based exercise, Groove Health helps you actively prevent falls, reduce fracture risks, and maintain your physical independence.

Ready to take control of your bone health? Sign up for Groove Health today to check your eligibility.

References

1. National Institute of Arthritis and Musculoskeletal and Skin Diseases. “Osteoporosis: Causes, Risk Factors, and Symptoms.” NIAMS, National Institutes of Health, 2023.
2. Medicare.gov. “Bone Mass Measurements.” Medicare.gov, accessed July 2026.
3. LeBoff MS, Greenspan SL, Insogna KL, et al. “The Clinician’s Guide to Prevention and Treatment of Osteoporosis.” Osteoporosis International, 2022.
4. US Preventive Services Task Force. “Screening for Osteoporosis to Prevent Fractures: US Preventive Services Task Force Recommendation Statement.” JAMA, 2018.
5. Eastell R, Rosen CJ, Black DM, et al. “Pharmacological Management of Osteoporosis in Postmenopausal Women: An Endocrine Society Clinical Practice Guideline.” The Journal of Clinical Endocrinology & Metabolism, 2019.

This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional for diagnosis and treatment. If you are on Medicare and interested in a personalized bone health program, you can check your eligibility at groovehealth.com.