Growth Plate Injuries
Pediatric physeal and apophyseal injuries, including Salter-Harris fractures and traction apophysitis
Overview
The Science of Growth Plate Injuries
Link copiedDuring growth, the ends of long bones contain a layer of cartilage called the , where new bone is laid down. That cartilage is mechanically weaker than the surrounding bone and, importantly, weaker than the nearby ligaments and tendons. The consequence is that a force which would sprain a ligament in an adult can instead injure the growth plate in a child or adolescent.
Two patterns account for most presentations. The first is an acute injury where a single significant force fractures through or across the growth plate. The second, and more common in clinic, is traction : a tendon repeatedly pulls on the growing bone at its attachment, irritating the area over weeks or months. Sever's disease at the heel and Osgood-Schlatter at the knee are the familiar examples.
Because the growth plate contributes to the future length and shape of the bone, acute injuries in this area warrant prompt medical assessment and imaging. Traction apophysitis, by contrast, is a load management problem and is generally self-limiting once growth completes, though it can be genuinely limiting while it is active.
Overview
Contributing Factors
Link copiedGrowth itself is the underlying driver. During a growth spurt bone lengthens before the surrounding muscle and tendon adapt, which transiently reduces flexibility and increases the pull on the attachment site. This is why symptoms so often coincide with a period of rapid growth.
Training load is the modifiable factor. High volumes of running and jumping, year-round participation in a single sport, and a sudden increase at the start of a season all raise the demand at the attachment. Playing through pain tends to prolong the episode rather than build tolerance.
Management in a growing athlete is therefore less about rest and more about calibration: reducing the aggravating load enough to settle symptoms, maintaining strength and flexibility around the area, and rebuilding volume at a rate the tissue can keep pace with. Complete withdrawal from sport is rarely necessary and is rarely the best answer.
Symptoms
Differential Diagnosis
Link copiedConditions with similar presentations:
Salter-Harris Physeal Fracture (Types I to V)
Key differences: Acute injury with focal pain directly over a , often after a clear mechanism such as a fall or tackle. Salter and Harris's 1963 classification describes five patterns, from slippage through the growth plate (Type I) to crush injury (Type V). Any suspected needs imaging and orthopaedic review, because types III, IV, and V carry higher risk of growth disturbance.
Osgood-Schlatter Disease (Tibial Tubercle Apophysitis)
Key differences: Traction at the tibial tubercle in growing athletes, with pain, swelling, and a prominent tender bump just below the kneecap. Worse with jumping, running, and kneeling. Typically self-limiting as skeletal maturity is reached, managed with load modification rather than complete rest.
Sever's Disease (Calcaneal Apophysitis)
Key differences: Heel pain in growing children, often 8 to 14 years old, worse with running and jumping, with tenderness on mediolateral squeeze. Commonly bilateral. Shoe cushioning, heel lifts, calf flexibility, and load modification usually do the heavy lifting.
Sinding-Larsen-Johansson Syndrome
Key differences: Traction at the inferior pole of the patella, the pediatric mirror of patellar . Focal anterior knee pain worse with jumping and running, tenderness at the bottom tip of the patella. Settles with load management through skeletal maturity.
Little League Shoulder / Elbow (Proximal Humeral and Medial Epicondylar Apophysitis)
Key differences: Overuse injuries in young throwing athletes, with pain over the proximal humeral or medial elbow. Often linked to high pitch counts or year-round throwing. DiFiori and colleagues' 2014 consensus on pediatric overuse injuries highlights load monitoring as central to prevention and recovery.
Slipped Capital Femoral Epiphysis (SCFE)
Key differences: Adolescent, often with elevated BMI, presenting with hip, groin, or referred knee pain and a limp. Externally rotated posture of the affected leg, loss of internal rotation, obligatory external rotation on hip flexion. Requires urgent orthopaedic assessment, not physiotherapy as a first line.
Rehabilitation
A Typical Rehabilitation Progression
Three phases, from settling symptoms to returning to full activity.
Recovery from Growth Plate Injuries is usually staged: calm the symptoms first, then rebuild the strength and capacity of the area, then return to your full activities. The three phases below show the kind of progression the evidence supports and that I commonly work through in clinic. They are here to show you what the road can look like, not to act as a personal program.
- Phase 1
Symptom Control and Load Reduction
Bring symptoms under control by reducing the volume of the most provocative tasks rather than stopping sport outright. Confirm that a higher-risk pattern has been ruled out. Keep the child engaged and motivated.
Examples, not a prescription
- Relative rest from the most aggravating activities, such as repeated jumping for Osgood-Schlatter or running on hard surfaces for Sever's
- Preserving non-aggravating training, such as skill work, swimming, or cycling, to maintain fitness and enjoyment
- Gentle mobility work for calves, hamstrings, and quadriceps as appropriate to the region
- Footwear review, with heel cups or cushioning where appropriate for Sever's
- Education for the child and parent on the nature of the condition and expected timelines
Ready to progress when
Daily activity and school tolerated without pain, pain with sport reduced to a manageable level, no night pain or pain at rest, and child and family clear on what is happening.
- Phase 2
Progressive Strengthening and Graduated Loading
Rebuild strength and loading capacity in the affected region while keeping overall training volume at a level the can tolerate. Strengthening exercises are central, and progressions are slower than in adult rehab.
Examples, not a prescription
- Progressive calf and quadriceps strengthening for lower-limb , starting with body weight and progressing to loaded variations as tolerated
- Scapular and work for throwing-related upper-limb presentations, with attention to overall throwing volume
- Single-leg balance and hop progressions on soft surfaces before firm surfaces, and bilateral before unilateral
- Sport-specific skill work in small doses, alongside ongoing cross-training
- Simple load monitoring, such as a training diary or traffic-light pain scale, so progressions are driven by response rather than guesswork
Ready to progress when
Tolerating progressive single-leg loading without symptom flare, able to run and jump at moderate intensity without next-day pain, and strength asymmetries noticeably reduced.
- Phase 3
Return to Full Sport and Long-Term Load Management
Bring the child back to full training and competition with a sustainable load pattern that respects the growing skeleton. This is where training culture and conversations with coaches and parents matter as much as the exercises themselves.
Examples, not a prescription
- Graded return to full training, following the principles in DiFiori and colleagues' 2014 consensus on pediatric overuse injuries
- Weekly training volume limited to sensible levels relative to age, with scheduled rest days and periods of reduced load
- Ongoing strength and mobility work built into a short home program, typically two to three sessions per week
- Periodic review, particularly around growth spurts, when tissue tolerance can shift quickly
- Open conversation about early specialisation, multi-sport participation, and preserving long-term enjoyment of sport
Ready to progress when
Full participation in sport without pain that limits performance, no recurrence on careful load progression, and a training structure the family can maintain independently.
Management
Frequently Asked Questions
Common concerns and answers about this condition.
What is a growth plate and why is it vulnerable?
What is a growth plate and why is it vulnerable?
A , or physis, is a zone of cartilage near the ends of long bones where lengthwise growth happens through childhood and adolescence. Because cartilage is mechanically weaker than the surrounding bone, the physis can be injured by forces that an adult bone would absorb without issue. That is why fractures and patterns are pediatric and adolescent problems rather than adult ones.
Is Osgood-Schlatter serious?
Is Osgood-Schlatter serious?
It is usually benign and self-limiting, but it is real pain and it can sideline a young athlete from sport they care about. The tibial tubercle stays tender and prominent because the patellar tendon pulls repeatedly on an immature . Management is mostly load modification, relative rest from the most provocative activities, calf and quadriceps mobility, and reassurance. Symptoms usually settle once the apophysis fuses around mid-to-late adolescence.
Does my child need to stop sport completely?
Does my child need to stop sport completely?
Rarely. For most patterns, such as Sever's, Osgood-Schlatter, and Sinding-Larsen-Johansson, complete rest is not the goal. DiFiori and colleagues' 2014 consensus on pediatric overuse injuries supports modifying training load, reducing volume of the most aggravating tasks, and keeping the child engaged in sport where possible. Complete rest is reserved for acute fractures or when pain is changing gait and function.
How are Salter-Harris fractures different from apophysitis?
How are Salter-Harris fractures different from apophysitis?
injuries are acute fractures through or near the , usually after a specific traumatic event. They are classified Type I through V based on where the fracture line runs, and types III, IV, and V have higher risk of growth disturbance. is a gradual traction overuse injury at a secondary growth centre, such as the tibial tubercle or , without a fracture. Management and urgency differ substantially.
Will my child end up with uneven legs or a deformity?
Will my child end up with uneven legs or a deformity?
The honest answer is that most pediatric injuries heal without any long-term growth disturbance, but a minority do cause partial or full growth arrest, especially with types III, IV, and V. That is why acute injuries with suspected physeal involvement are followed up by the orthopaedic team over months, not just weeks. conditions do not typically cause long-term deformity.
What is an appropriate training load for a young athlete?
What is an appropriate training load for a young athlete?
Broad principles from the DiFiori and colleagues 2014 consensus include at least one to two rest days per week, avoiding year-round single-sport specialisation before mid-adolescence, keeping training hours per week from exceeding the child's age as a rough guide, and respecting pain signals rather than pushing through. Coaches, parents, and the child all have a role in the conversation, not just the physio.
Do I need an X-ray?
Do I need an X-ray?
If the injury is acute with suspected fracture, yes, imaging is part of the initial workup. For presentations with a classic clinical picture, such as a 12-year-old gymnast with bilateral heel pain and positive squeeze, imaging often adds little. I usually escalate to imaging when the story does not match the exam, when symptoms are not settling as expected, or when a higher-risk pattern is suspected.
When can my child return to full sport?
When can my child return to full sport?
For conditions, return to sport is graded rather than binary. Once pain is tolerable with daily activity and single-leg loading, a progressive return to running, then jumping, then sport-specific drills, then full training, is the usual path. For fractures, return is guided by the orthopaedic team and depends on the fracture type, healing, and any activity restrictions they set.
Related Conditions
Conditions I commonly see alongside, or confused with, this one.