Recovery Insights Blog | Foundational Rehab

Bones Need Stress

It seems counterintuitive: if you have weak bones, shouldn't you protect them? Actually, bones need mechanical stress to stay strong. Without it, they weaken further.

Here's how exercise protects your bones—and how to do it safely.

Understanding Bone Health

How Bones Work

Bones are living tissue, constantly being broken down and rebuilt. This process is called remodeling.

**Osteoclasts:** Break down old bone

**Osteoblasts:** Build new bone

When breakdown exceeds building, bones weaken.

Bone Density Terminology

Normal: T-score above -1.0

Osteopenia: T-score between -1.0 and -2.5 (lower bone mass)

Osteoporosis: T-score at or below -2.5 (significantly reduced bone mass)

T-scores compare your bone density to a healthy 30-year-old.

Why It Matters

Low bone density increases fracture risk. Hip, spine, and wrist fractures can have serious consequences, especially in older adults.

How Exercise Builds Bone

Wolff's Law

Bones adapt to the loads placed on them. More stress (within limits) = stronger bones. No stress = weaker bones.

Astronauts lose bone mass in space because of zero gravity. Bed rest causes rapid bone loss. Your bones need you to move.

What Works

Two types of exercise build bone:

1. Weight-bearing impact exercise:

Forces through bones during standing activities

Impact creates beneficial stress signals

Examples: walking, running, jumping, dancing, tennis

2. Resistance training:

Muscles pulling on bones stimulates growth

Higher loads are more effective

Examples: weight lifting, resistance bands, bodyweight exercises

What Doesn't Work (For Bones)

Swimming

Cycling

Low-resistance exercise

These are great for cardiovascular health but don't provide enough bone stress. Include them, but they shouldn't be your only exercise.

Exercise Guidelines for Bone Health

If You Have Normal Bone Density (Prevention)

Impact exercise: 30+ minutes, most days

Brisk walking, jogging, hiking, tennis, dancing

Resistance training: 2-3 times per week

All major muscle groups

Progress to challenging weights

8-12 repetitions, 2-3 sets

Balance training: Regular practice

Prevents falls (which cause fractures)

Single-leg stance, tai chi, yoga

If You Have Osteopenia

Same recommendations as above, with attention to:

Proper form to prevent injury

Gradual progression

Avoiding extreme spinal flexion under load

Higher-impact activities are still beneficial and appropriate for most people.

If You Have Osteoporosis

What's still beneficial:

Weight-bearing walking

Resistance training (modified if needed)

Balance training (critical for fall prevention)

Posture exercises

What needs caution:

High-impact jumping (depends on severity)

Loaded spinal flexion (forward bending with weight)

Extreme rotation under load

Activities with fall risk

Work with a professional to design an appropriate program.

The Best Exercises for Bone Health

Lower Body (Hip and Spine)

Squats: The king of bone-building exercises

Loads spine and hips

Progress weight over time

Use proper form

Deadlifts: Excellent for hip and spine

Start light, focus on form

Romanian deadlifts are a good variation

Lunges and step-ups: Single-leg loading

Challenges balance

Functional movement

Heel drops: Simple impact exercise

Rise on toes, drop heels to floor

Creates impact through the skeleton

Upper Body (Wrist and Spine)

Pushing exercises: Push-ups, bench press, overhead press

Load through arms and spine

Wrist stress during weight-bearing

Pulling exercises: Rows, lat pulldowns

Spine loading

Upper back strength

Carrying: Farmer's walks

Loads entire skeleton

Functional and effective

Spine-Specific

Back extensions: Strengthen spinal extensors

Important for posture

Counteracts flexion

Rows and reverse flies: Upper back strength

Reduces kyphosis (rounded upper back)

Protects vertebrae

Planks: Core stability

Protects spine during activity

Isometric loading

Balance (Fall Prevention)

Falls cause fractures. Balance training is essential:

Single-leg stance (progress to eyes closed)

Tandem walking (heel to toe)

Tai chi (excellent evidence for fall reduction)

Standing on unstable surfaces

Reactive balance drills

What to Avoid

With Osteoporosis

Loaded spinal flexion:

Crunches and sit-ups

Toe touches with weight

Forward bending while lifting

Why? The front of vertebrae compresses, increasing fracture risk.

High fall-risk activities:

Activities on unstable surfaces (if balance is poor)

Sports with collision risk

Icy or slippery conditions

Extreme twisting under load:

Golf and tennis are usually fine

Be cautious with heavy rotational exercises

Common Sense Precautions

Use proper form always

Progress gradually

Avoid exercising when fatigued

Create a safe environment (no tripping hazards)

Wear appropriate footwear

Building a Bone-Health Program

Sample Week (Osteopenia/Prevention)

Monday: Weight training (lower body focus)

Squats, deadlifts, lunges, calf raises

3 sets of 8-12 reps

Tuesday: Weight-bearing cardio

30-minute brisk walk or hike

Include some hills

Wednesday: Weight training (upper body focus)

Rows, push-ups, overhead press, planks

3 sets of 8-12 reps

Thursday: Balance and flexibility

Tai chi, yoga, or balance exercises

20-30 minutes

Friday: Weight training (full body)

Mix of exercises from other days

Include farmer's walks

Saturday: Active recreation

Tennis, dancing, hiking, golf

Something you enjoy

Sunday: Rest or gentle walking

Progression

Bones adapt slowly. Expect:

6-12 months to see density changes

Continued improvement over years

Need for ongoing exercise (benefits reverse when you stop)

This is a lifelong commitment, not a quick fix.

Nutrition for Bones

Exercise alone isn't enough. You also need:

Calcium: 1000-1200 mg/day (from food ideally)

Dairy, fortified foods, leafy greens, sardines

Vitamin D: 800-1000 IU/day (or per blood levels)

Sun exposure, supplements, fatty fish

Protein: Adequate intake supports bone and muscle

0.8-1.0 g/kg body weight minimum

Limit: Excessive alcohol, caffeine, sodium, and smoking—all negatively affect bone health.

Medication and Exercise

If you're on bone medications (bisphosphonates, etc.):

Exercise is still essential and beneficial

Medication and exercise work together

Don't rely on medication alone

Discuss your exercise plan with your doctor

Starting Later in Life

It's Never Too Late

Even in your 70s, 80s, and beyond:

Exercise can improve bone density

Strength gains are absolutely possible

Balance improvements reduce fall risk

Function and independence improve

Start where you are. Chair exercises, wall push-ups, and short walks are valid starting points that can progress over time.

The Bottom Line

Your bones need you to challenge them. Impact exercise and resistance training tell bones to stay strong.

If you have osteoporosis, work with knowledgeable professionals to create a safe program. Avoid loaded spinal flexion, but don't avoid exercise altogether—that's the worst thing you can do.

Combine exercise with good nutrition and fall prevention strategies. Your bone health is largely in your hands.

Move it or lose it. Your bones are listening.

Osteoporosis and Exercise: How to Build Stronger Bones at Any Age