Exercise After a Fracture: Returning to Fitness After Cast Removal

The cast is finally off. Your bone has healed. But your limb looks smaller, feels weaker, and moves differently than before. Now what?

Returning to exercise after a fracture requires patience and progression. This guide covers how to safely rebuild strength, mobility, and confidence after a broken bone.

What Happens During Immobilization

While you were in a cast, several things occurred:

• Muscle atrophy: Muscles shrink significantly (20-30% strength loss is common)
• Joint stiffness: Connective tissue tightens without movement
• Bone weakening: The healed bone and surrounding bones lose density
• Proprioception loss: Your body's sense of position decreases
• Swelling: Fluid may accumulate, especially in lower limbs
• Nerve sensitivity: The area may feel strange or hypersensitive

The good news: Your body recovers faster than it declined. Muscle memory helps rebuild strength quicker than building it originally.

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The 4 Phases of Post-Fracture Recovery

Phase 1: Immediate Post-Cast (Weeks 1-2)

Goals:

• Reduce swelling
• Restore basic range of motion
• Begin gentle muscle activation
• Manage pain and sensitivity

What to do:

Swelling management:

• Elevate the limb when resting
• Ice 15-20 minutes, several times daily
• Gentle compression if recommended
• Move the limb gently to promote circulation

Range of motion:

• Gentle, pain-free movements
• Move the joint through available range
• Multiple short sessions daily (5-10 minutes, 3-4x/day)
• Don't force—work within comfortable limits

Muscle activation:

• Isometric contractions (tighten muscles without moving joint)
• Very light movements
• Focus on "waking up" the muscles

Don't do:

• Stretching aggressively
• Loading the limb heavily
• Pushing through significant pain
• Impact activities

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Phase 2: Mobility and Light Strengthening (Weeks 2-6)

Goals:

• Restore full (or near-full) range of motion
• Begin progressive strengthening
• Improve joint stability
• Reduce lingering swelling

What to do:

Range of motion:

• Gentle stretching at end range
• Active movement through full available range
• May include assisted stretching
• Compare to uninjured side for goals

Strengthening:

• Bodyweight exercises first
• Very light resistance bands
• Isometric exercises at multiple angles
• Progress from non-weight-bearing to weight-bearing (lower limb)

Proprioception:

• Balance exercises (if lower limb)
• Coordination drills
• Movement awareness exercises

Signs you're progressing well:

• Range of motion increasing
• Swelling decreasing
• Less pain with daily activities
• Strength returning

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Phase 3: Progressive Strengthening (Weeks 6-12)

Goals:

• Rebuild significant strength
• Return to normal daily activities
• Prepare for return to exercise/sport
• Full range of motion

What to do:

Strengthening:

• Progressive resistance (weights, bands)
• Compound movements
• Start with higher reps, lower load
• Progress weight gradually

Functional training:

• Movements that mimic daily life
• Sport-specific movements (later in phase)
• Power and speed work (end of phase)

Cardiovascular:

• Low-impact options initially (bike, swimming, elliptical)
• Progress to walking, then running (lower limb)
• Build duration before intensity

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Phase 4: Return to Full Activity (Months 3-6+)

Goals:

• Equal strength to uninjured side
• Full participation in activities
• Confidence in the limb
• Prevention of re-injury

Criteria to return to sports:

• 90%+ strength compared to uninjured side
• Full range of motion
• No pain with activity
• Passed sport-specific tests
• Cleared by healthcare provider

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Specific Fracture Locations

Wrist Fracture (Distal Radius)

Common challenges: Grip weakness, limited wrist extension, finger stiffness

Key exercises:

Early (Phase 1-2):

• Finger tendon glides (make fist, open fully)
• Wrist circles (gentle)
• Wrist flexion/extension (active movement)
• Putty squeezing (light resistance)

Progressive (Phase 3+):

• Wrist curls and reverse curls
• Grip strengthening
• Forearm rotation exercises
• Push-up progressions (on knees, then full)

Timeline: Most return to normal activity by 8-12 weeks; full strength by 3-6 months.

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Ankle Fracture

Common challenges: Stiffness (especially dorsiflexion), weakness, balance issues

Key exercises:

Early (Phase 1-2):

• Ankle alphabet (trace letters with foot)
• Ankle pumps (up and down)
• Towel scrunches (toes)
• Gentle calf stretches (no aggressive stretching)

Progressive (Phase 3+):

• Calf raises (double leg, then single)
• Heel walks, toe walks
• Balance board exercises
• Step-ups and step-downs
• Walking progression, then jogging

Timeline: Weight-bearing varies by fracture type (4-8 weeks); full activity 3-6 months.

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Lower Leg Fracture (Tibia/Fibula)

Common challenges: Significant muscle atrophy, walking pattern changes, weakness

Key exercises:

Early (Phase 1-2):

• Ankle movements (maintain mobility)
• Quad sets (isometric)
• Straight leg raises (non-weight-bearing)
• Hip strengthening (to compensate)

Progressive (Phase 3+):

• Weight-bearing progression per MD
• Squats (bodyweight to loaded)
• Leg press
• Calf strengthening
• Gait retraining (normal walking pattern)
• Return to running program

Timeline: Weight-bearing often delayed 6-12 weeks; return to running 4-6 months; full activity 6-12 months.

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Upper Arm/Shoulder Fracture (Humerus)

Common challenges: Shoulder stiffness, weakness, fear of movement

Key exercises:

Early (Phase 1-2):

• Pendulum exercises (gentle swinging)
• Elbow/wrist/finger movements (maintain mobility)
• Isometric shoulder contractions
• Scapular squeezes

Progressive (Phase 3+):

• Shoulder ROM exercises (flexion, abduction, rotation)
• Rotator cuff strengthening (light bands)
• Pushing and pulling progressions
• Return to pressing movements

Timeline: Varies significantly by fracture location; often 3-6 months to return to lifting.

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Important Guidelines

Progress Based on Symptoms, Not Calendar

Advance when:

• Current exercises are easy and pain-free
• Range of motion is improving
• Strength is returning
• You've completed 1-2 weeks at current level

Hold back when:

• Pain increases
• Swelling returns
• Range of motion plateaus or decreases
• Something doesn't feel right

The 10% Rule

Don't increase intensity or volume by more than 10% per week. This applies to:

• Weight/resistance
• Repetitions
• Duration of activity
• Training frequency

Compare to Your Uninjured Side

Your goal is equal strength and mobility to your other limb (or to pre-injury levels if both limbs were injured).

Testing:

• Can you do the same number of reps?
• Same weight?
• Same range of motion?
• Same balance/stability?

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Red Flags: When to Stop and Consult

Seek medical attention if you experience:

• Sharp pain at fracture site
• Increased swelling after exercise
• Numbness or tingling
• Visible deformity
• Inability to bear weight (if you were cleared to)
• Fever or signs of infection
• Clicking or instability at fracture site
• Pain that doesn't resolve with rest

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Sample Return-to-Running Program (Post Lower Limb Fracture)

Prerequisites:

• Full weight-bearing without pain
• Good single-leg balance
• Can do 20 single-leg calf raises
• Cleared by healthcare provider

Week 1:

• Walk 20 min, 4x/week
• Include 4x1 min easy jog intervals

Week 2:

• Walk 5 min / Jog 3 min, repeat 3x
• 3-4 sessions

Week 3:

• Walk 3 min / Jog 5 min, repeat 3x
• 3-4 sessions

Week 4:

• Walk 2 min / Jog 8 min, repeat 2x
• 3-4 sessions

Week 5:

• Jog 15-20 min continuous (easy pace)
• 3 sessions

Week 6+:

• Progress duration and intensity gradually
• Add hills and speed work only after base is solid

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Rebuilding Overall Fitness

If Upper Limb Was Injured:

• Lower body training could continue (modified)
• Cardio via walking, stationary bike, stairs
• Core training (modified to avoid upper body loading)

If Lower Limb Was Injured:

• Upper body training could continue
• Seated cardio (arm bike, swimming with pull buoy)
• Core training (no lower limb involvement)

Key: Don't lose total body fitness while rehabbing one area.

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Managing Expectations

Typical timelines:

• Minor fractures: 6-8 weeks to basic function, 3-4 months to full activity
• Moderate fractures: 8-12 weeks to basic function, 4-6 months to full activity
• Severe fractures: 3-6 months to basic function, 6-12+ months to full activity

What affects recovery:

• Fracture severity and location
• Age (younger heals faster)
• Nutrition (especially protein, calcium, vitamin D)
• Compliance with rehab
• Overall health
• Whether surgery was required

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Key Takeaways

1. Patience is mandatory—bones heal on their timeline, not yours
2. Mobility before strength—restore range of motion first
3. Progress gradually—10% rule applies
4. Compare to uninjured side—that's your goal
5. Don't skip physical therapy—professional guidance accelerates recovery
6. Listen to your body—pain is information
7. Maintain overall fitness—work around the injury, not just on it

The cast coming off is the beginning, not the end. Give your body the time it needs to rebuild, and you'll return to full activity stronger and more resilient.