Achilles Tendon Tear
Dr. Strasser Achilles Tendon Repair Protocol
Achilles Tendon Repair Rehabilitation Protocol
For Acute Surgical Repair (Open or MIS)
📞 Call (615) 936-7846 to schedule a consultation
Overview:
Acute Achilles tendon ruptures most commonly occur in active adults in their 20s–40s during recreational sport. Surgical repair restores tendon continuity and length-tension relationship of the gastroc-soleus complex.
Modern rehabilitation emphasizes:
- Early protected weight bearing
- Early controlled range of motion
- Avoidance of prolonged immobilization
Level I evidence supports accelerated functional rehabilitation without increased rerupture risk when properly supervised
Progression is criteria-based, not calendar-driven.
Why Early Motion and Early Weight Bearing Matter — But Must Be Protected
Modern Achilles rehabilitation emphasizes early range of motion (ROM) and early weight bearing because controlled mechanical loading improves tendon healing. Gentle, protected movement stimulates collagen organization, reduces stiffness, improves circulation, and helps prevent muscle atrophy. Studies have shown that when performed in a structured and protected manner, early functional rehabilitation does not increase rerupture rates and leads to excellent long-term outcomes.
However, there is an important distinction between early loadingand unrestricted loading.
If too much stress is placed on the tendon too soon — especially excessive dorsiflexion stretching or aggressive weight bearing without protection — the healing tendon can lengthen. Tendon lengthening alters the normal length-tension relationship of the gastrocnemius-soleus complex. Even a small increase in tendon length can lead to:
- Persistent weakness with push-off
- Loss of explosive power
- Reduced single-leg heel raise strength
- Difficulty returning to high-level sport
Excessive early strain can also disrupt collagen alignment, leading to atypical tendon remodeling and inferior mechanical properties.
The goal, therefore, is early but protected motion — gradual dorsiflexion to neutral, progressive weight bearing in a boot with heel lifts, and structured advancement based on tissue healing and strength milestones.
Rehabilitation after Achilles repair is a balance:
- Too little motion → stiffness and deconditioning
- Too much too soon → tendon elongation and strength loss
A carefully guided, criteria-based progression protects the repair while optimizing long-term strength and function.
Phase I: Protection & Early Healing (Weeks 0–2)
Goals
- Protect repair
- Minimize swelling
- Promote incision healing
- Prevent proximal deconditioning
Immobilization
- Posterior splint in ~20° plantarflexion
- Strict elevation
Weight Bearing
- Non–weight bearing
Activity
- Hip/core strengthening
- Straight leg raises
- Toe mobility
- Upper body conditioning
Phase II: Early Functional Rehabilitation (Weeks 2–6)
Transition (2 Weeks Post-op)
- Wound check
- Sutures removed once healed
- Transition to removable CAM boot with 2 cm heel lift (~20° PF)
Weight Bearing
- Begin protected weight bearing at 2 weeks
- Progress to weight bearing as tolerated by 4 weeks if:
- Pain controlled
- No increased swelling
- No wound issues
Range of Motion
- Active plantarflexion immediately
- Active dorsiflexion to neutral only
- No passive DF stretching
- Knee flexed during early DF exercises
Therapy Focus
- Edema control
- Scar mobilization
- Seated bike (boot on)
- Gentle intrinsic activation
- Proximal strengthening
Phase III: Progressive Loading (Weeks 6–10)
Goals
- Normalize gait
- Restore 4-quadrant ankle ROM
- Begin strengthening
Weight Bearing
- Wean from boot 6–8 weeks
- Transition to supportive shoe with heel lift
ROM
- Gradual passive dorsiflexion after 8 weeks
- Avoid aggressive stretching
Strength
- Seated calf raises
- Isometrics → light isotonic PF
- Inversion/eversion strengthening
- Double-leg balance progression
Phase IV: Strength & Gait Restoration (Weeks 10–14)
Goals
- Restore strength symmetry
- Prepare for impact progression
Strength Criteria to Advance
- 15–20 single leg heel raises
- No reactive swelling
Interventions
- Eccentric plantarflexion emphasis
- Double-leg heel raises → single-leg progression
- Treadmill walking
- Begin walk/jog program (~12 weeks)
Phase V: Return to Running & Sport Progression (Weeks 14–24)
Goals
- Restore explosive strength
- Improve tendon load tolerance
- Prepare for sport-specific demands
Activities
- Progressive running program
- Plyometrics (double → single limb)
- Agility drills
- Cutting and change-of-direction drills
Criteria for Running
- Pain-free walking
- Symmetric gait
- ≥80% plantarflexion strength vs contralateral side
Phase VI: Full Return to Sport (4–6+ Months)
Return is criteria-based, not time-based.
Clearance Requirements
- No mid-substance tenderness
- No swelling after high-load activity
- Symmetric ROM
- ≥90% strength vs contralateral limb
- Pain-free single-leg hop
- Sport-specific mechanics without compensation
- Psychological readiness
Elite cutting sports may require 6–9 months.
Special Considerations
Chronic Repairs or Tendon Transfers
- Immobilization may extend to 4 weeks
- PT initiation may delay to 5–6 weeks
- Slower dorsiflexion progression
MIS vs Open Repair
- MIS often allows slightly more confident early motion
- Wound complications are lower with MIS
Expected Recovery Milestones
Timepoint: Expected Status:
2 weeks Protected WB initiated
6 weeks Neutral DF achieved
12 weeks Begin jog progression
4 months Sport progression
6 months Full sport participation (most patients)
12 months ≥80–90% strength recovery
Evidence Foundation
- Willits et al. Operative vs Nonoperative Treatment of Acute Achilles Tendon Ruptures Using Accelerated Functional Rehabilitation
- Costa ML et al. Early weight-bearing studies
- Kangas et al. Tendon elongation studies
- Jackson JB 3rd, Strasser NL, Gonzalez T, Park J. Management and Return to Play of the Elite Athlete for Common Sports-Related Injuries About the Ankle. J Am Acad Orthop Surg. 2025.