Specialized Physical Therapy Guided by National-Level Expertise in Cartilage Restoration Rehabilitation
Recovering from MACI surgery or another cartilage restoration procedure requires more than following a standardized postoperative protocol. Successful rehabilitation demands an understanding of cartilage biology, surgical considerations, progressive loading, and the physical demands of returning to sport and everyday life.
At Longevity Physical Therapy & Performance, patients receive individualized, one-on-one rehabilitation led by Lewis Lupowitz, PT, DPT, SCS, CSCS, a board-certified Sports Clinical Specialist and consultant to Vericel, the company behind the MACI implant.
Through his involvement with Vericel, Lewis collaborates with leading orthopedic surgeons and rehabilitation specialists from across the country to discuss contemporary rehabilitation strategies, clinical decision-making, and return-to-sport considerations following cartilage restoration procedures.
Our goal is to translate this specialized knowledge into individualized, evidence-informed care that protects healing tissue, restores physical capacity, and supports a confident return to activity.
Understanding Cartilage Restoration & MACI Surgery
Articular cartilage is the smooth tissue covering the ends of bones within a joint, allowing for efficient movement and distribution of forces during physical activity.
When cartilage becomes damaged, patients may experience pain, swelling, stiffness, mechanical symptoms, and difficulty participating in daily activities or sports. Because articular cartilage has limited intrinsic healing capacity, certain injuries may require surgical intervention.
MACI (Matrix-Induced Autologous Chondrocyte Implantation) is a two-stage cartilage restoration procedure that uses a patient’s own cartilage cells, which are collected, expanded in a laboratory, and implanted on a collagen membrane to treat selected full-thickness cartilage defects of the knee.
Other cartilage restoration procedures include:
Osteochondral autograft transfer (OATS)
Osteochondral allograft transplantation (OCA)
Microfracture and other marrow stimulation procedures
Additional cartilage repair and restoration techniques
Each procedure has unique biological and mechanical considerations that influence postoperative rehabilitation, weight-bearing progression, exercise selection, and return-to-activity timelines.
Successful rehabilitation must account for both the surgical procedure and the individual patient’s functional demands.
Why Choose Longevity for MACI & Cartilage Restoration Rehabilitation?
National-Level Expertise. Individualized Patient Care.
Cartilage restoration rehabilitation is a highly specialized area of sports physical therapy, requiring an understanding of surgical techniques, tissue healing, joint loading, and long-term functional outcomes.
Lewis Lupowitz, PT, DPT, SCS, CSCS, founder of Longevity Physical Therapy & Performance, serves as a consultant and rehabilitation subject-matter expert for Vericel, the biotechnology company responsible for developing and manufacturing MACI (Matrix-Induced Autologous Chondrocyte Implantation).
In this role, Lewis contributes to professional discussions and educational initiatives focused on advancing rehabilitation following cartilage restoration surgery.
Direct Collaboration with National Experts
Lewis has participated in Vericel’s Medical Advisor Summit for two consecutive years at the company’s Massachusetts facilities.
These meetings bring together experienced orthopedic surgeons and rehabilitation professionals from across the United States to examine evolving rehabilitation practices, postoperative considerations, and return-to-sport decision-making following MACI surgery.
Through these collaborative discussions, Lewis has contributed his clinical perspective to the ongoing development and refinement of contemporary rehabilitation guidance, including considerations related to strength development, progressive loading, functional testing, and return-to-sport readiness.
Educating Physical Therapists Nationwide
Beyond his clinical practice, Lewis serves as a rehabilitation educator and subject-matter expert through Vericel’s professional education initiatives.
He travels nationally to lecture and educate physical therapists on the continuum of care following MACI surgery, including:
Understanding MACI surgery and cartilage healing biology
Early postoperative protection and rehabilitation considerations
Progressive strength development and joint loading
Differences between patellofemoral and tibiofemoral cartilage lesions
Objective strength and functional performance testing
Return-to-running, impact, and athletic progression
Return-to-sport and long-term activity considerations
His educational work helps bridge the gap between surgical treatment, rehabilitation science, and practical clinical application.
Bringing Specialized Care to Long Island
Patients at Longevity benefit from the same clinical principles Lewis discusses with surgeons, rehabilitation specialists, and physical therapists at the national level.
Rather than relying exclusively on generalized timelines, rehabilitation is individualized according to the surgical procedure, lesion characteristics, biological healing, symptom response, objective testing, and the patient’s goals.
The result is highly individualized, one-on-one rehabilitation informed by ongoing collaboration, clinical experience, and contemporary cartilage restoration practices.
Our Approach to MACI & Cartilage Restoration Rehabilitation
Successful cartilage restoration rehabilitation requires balancing protection of the healing repair tissue with the progressive restoration of strength, movement quality, and physical capacity.
At Longevity, we recognize that no two cartilage injuries—or surgical procedures—are identical.
Our approach considers:
Surgical procedure and lesion characteristics: Including defect size, location, associated procedures, and surgeon-specific precautions.
Biological healing: Respecting the time required for repair tissue maturation and adaptation to loading.
Progressive loading: Carefully restoring the joint’s tolerance to increasing physical demands.
Objective performance testing: Using measurable strength and functional assessments to guide rehabilitation decisions.
Neuromuscular and neurocognitive rehabilitation: Preparing patients for progressively complex movement and athletic demands.
Return-to-sport preparation: Bridging the gap between traditional postoperative rehabilitation and the demands of exercise, recreation, and competitive athletics.
Long-term joint health: Emphasizing strength, physical capacity, and sustainable participation in activity.
Our philosophy is simple: respect the biology, restore the capacity, and earn the progression.
Our Four-Phase Rehabilitation Process
Phase 1: Protect Healing Cartilage & Restore Foundational Function
Early rehabilitation focuses on protecting the surgical site while addressing pain, swelling, range-of-motion limitations, and quadriceps inhibition.
Treatment may include appropriate mobility exercises, quadriceps activation, gait training, neuromuscular re-education, and carefully controlled loading within surgeon-specific postoperative restrictions.
Particular attention is given to the location of the cartilage repair, as patellofemoral and tibiofemoral lesions experience different mechanical loading demands.
Our goal is to establish a strong foundation for recovery while respecting the biological healing process.
Phase 2: Restore Strength, Control & Progressive Loading Capacity
As healing progresses and surgical restrictions permit, rehabilitation emphasizes restoring lower-extremity strength, neuromuscular control, and functional loading tolerance.
Treatment incorporates progressive resistance training targeting the quadriceps, hamstrings, hips, and calf musculature, alongside balance training, single-leg control, and functional movement development.
We monitor joint swelling, pain, movement quality, and strength to guide exercise progression and determine the appropriate loading response.
Our focus is rebuilding the physical capacity necessary to tolerate increasingly demanding activities.
Phase 3: Reintroduce Running, Jumping & Athletic Movement
Once appropriate healing milestones and clinical readiness criteria have been achieved, rehabilitation may progress toward running, impact activities, and higher-level athletic movement.
Depending on the surgical procedure, lesion location, symptoms, and surgeon guidance, this phase may incorporate impact preparation, progressive running exposure, landing mechanics, plyometrics, and multidirectional movement.
Objective strength assessments, movement testing, and symptom monitoring help determine readiness for increasing activity demands.
Progression is guided by demonstrated readiness—not simply time since surgery.
Phase 4: Return to Sport & Long-Term Performance
Returning to sport following cartilage restoration requires more than the absence of pain or completion of a postoperative timeline.
Athletes must demonstrate sufficient biological healing, strength, movement quality, functional performance, and tolerance to the specific demands of their sport.
Our return-to-sport process may incorporate advanced strength development, hop and performance testing, reactive movement, deceleration, change-of-direction training, and sport-specific workload progression.
We collaborate with the treating surgeon to ensure return-to-sport decisions appropriately account for healing, surgical considerations, and individual recovery.
Our ultimate goal is to help patients return confidently to sport and physical activity while prioritizing long-term joint health.
Objective Testing & Return-to-Sport Decision-Making
At Longevity Physical Therapy & Performance, we believe objective testing is essential for identifying physical deficits, monitoring progress, and supporting informed rehabilitation decisions.
Depending on the patient’s stage of recovery and individual goals, assessments may include:
Quadriceps and hamstring strength testing
Hip and calf strength assessments
Strength-to-body-weight ratios and limb symmetry
Single-leg movement quality and neuromuscular control
Hop testing and functional performance assessments
Landing mechanics and deceleration strategies
Neurocognitive and reactive movement challenges
Patient-reported outcomes and functional confidence
Pain, swelling, and joint response to progressive activity
Sport-specific performance and workload tolerance
No single test determines readiness to return to sport.
We integrate objective findings with biological healing, surgical considerations, clinical presentation, and the patient’s specific activity demands to guide individualized progression.
Frequently Asked Questions about MACI Rehabilitation
How Long Does Rehabilitation Take After MACI Surgery?
MACI rehabilitation is a lengthy, individualized process. Recovery depends on the size and location of the cartilage defect, associated procedures, surgical restrictions, and individual progress.
While patients may return to many daily activities earlier, returning to running, jumping, and higher-demand sports typically requires additional time. Return to competitive sports commonly occurs around 12 months or longer, depending on the procedure and recovery.
When Can I Begin Running After MACI Surgery?
Running should be introduced only when appropriate biological healing, strength, movement quality, and clinical readiness criteria have been achieved.
The timing varies based on lesion location, surgical considerations, symptoms, and surgeon recommendations. We use objective assessments and progressive loading strategies to help guide this transition.
Is Rehabilitation Different for Patellar versus Femoral Condyle Cartilage Lesions?
Yes. Patellofemoral and tibiofemoral cartilage lesions experience different mechanical loading environments.
Exercise selection, range-of-motion considerations, weight-bearing progression, and loading strategies should account for the location of the repair and the specific surgical procedure.
Can I Return to Competitive Sports After MACI Surgery?
Many patients are able to return to recreational and competitive athletic activity following cartilage restoration, although outcomes vary.
Return-to-sport decisions should consider biological healing, strength, movement quality, functional performance, symptoms, and the specific demands of the athlete’s sport.
While patients may return to many daily activities earlier, returning to running, jumping, and higher-demand sports typically requires additional time. Return to competitive sports commonly occurs around 12 months or longer, depending on the procedure and recovery.
What Makes MACI Rehabilitation Different from Traditional Knee Rehabilitation?
MACI rehabilitation requires careful consideration of cartilage healing and repair tissue maturation.
Unlike many routine musculoskeletal injuries, cartilage restoration procedures may require prolonged protection and more conservative progression of certain loading activities.
A specialized approach helps balance protection of the healing implant with the restoration of strength, mobility, and athletic capacity.
Do You Work With Patients Who Had Surgery at Another Hospital or Orthopedic Practice?
Yes. Longevity Physical Therapy & Performance works with patients following cartilage restoration procedures performed by surgeons throughout Long Island, New York City, and beyond.
We collaborate with the treating surgical team when appropriate to ensure rehabilitation aligns with postoperative precautions and individual recovery goals.
Schedule Your MACI & Cartilage Restoration Rehabilitation Evaluation
Whether you are preparing for MACI surgery, beginning postoperative rehabilitation, or working to regain strength and confidence later in recovery, Longevity Physical Therapy & Performance provides individualized care tailored to your procedure and goals.
Located in West Hempstead, New York, we work with patients throughout Nassau County, Suffolk County, and the greater Long Island area.
