Why Does My Teen’s Back Hurt? Could It Be a Fracture?
Back pain in teenagers deserves attention—especially when it keeps returning during sports.
Sometimes the problem is muscle soreness or a recent increase in training. But one diagnosis we specifically consider in young athletes is spondylolysis, a type of stress fracture in the lower back.
At Summit Physical Therapy, we frequently treat teens with spondylolysis, pars fractures, and lumbar stress reactions. Our physical therapists are trained to recognize concerning signs, refer for specialist evaluation when appropriate, and guide athletes through rehabilitation.
The first step is understanding what is causing the pain. The next is building a plan that gets your teen back to the activities they love.
What is spondylolysis?
Spondylolysis is a defect or stress fracture in a small bridge of bone called the pars interarticularis, located at the back of a vertebra. You may hear it called a pars fracture, pars defect, or lumbar stress fracture.
Parents sometimes describe it as a back fracture. That term can sound frightening, but a pars stress fracture usually develops from repeated loading over time. It does not necessarily involve a major fall or collision.
Sports that repeatedly involve back bending, rotation, or heavy loading can stress this area. Gymnastics, dance, football, and weightlifting are examples, although spondylolysis can occur outside these sports. AAOS
Stress reaction vs. stress fracture: What is the difference?
Bone stress injuries exist along a spectrum.
A stress reaction is an earlier bone stress injury, with changes such as swelling within the bone but no clear fracture line. A stress fracture involves a crack in the bone. When that crack occurs through the pars, it is called a pars fracture.
MRI can identify a stress reaction before a fracture line is visible on other imaging. Recognizing this stage helps the care team adjust activity and treatment appropriately. A stress reaction does not inevitably become a fracture. PubMed
What symptoms make us consider a pars stress injury?
Signs that raise suspicion include:
Lower back pain that repeatedly returns with sports.
Pain with arching backward, twisting, or throwing. (Dance, Baseball, Lacrosse, Soccer are common sports)
Pain concentrated in a particular area of the lower back. (think isolated, not widespread)
Symptoms that improve with rest but return when training resumes. Especially worse after practice.
These patterns warrant assessment, but they do not prove there is a fracture. Choose PT
Your teen does not need to be in severe pain for an evaluation to be worthwhile. If the same back pain keeps interrupting practice, games, or daily activity, we want to understand why.
Can a physical therapist screen for spondylolysis?
Yes. Physical therapists are trained to screen for lumbar stress injuries and recognize when specialist assessment is needed.
At Summit Physical Therapy, our evaluation considers the history of the pain, recent training changes, aggravating movements, and how the athlete moves. We also assess surrounding areas, including the hips.
If the findings suggest a stress reaction or pars fracture, we refer to an appropriate sports medicine, pediatric orthopedic, or spine specialist. Imaging may be needed to confirm the diagnosis. An early injury may not appear on an X-ray, and an MRI may be considered when suspicion remains. Choose PT
A physical examination helps us determine the next step; it cannot reliably confirm or exclude a pars fracture on its own.
Knowing when to refer is part of skilled physical therapy care.
Can physical therapy treat a pars fracture?
Yes. Physical therapists are trained to rehabilitate spondylolysis, and most young athletes are treated without surgery. Activity modification and, in selected cases, bracing may also be part of the medical plan. Choose PT
At Summit Physical Therapy, we work with this diagnosis frequently. We coordinate rehabilitation with the specialist’s recommendations and tailor the progression to the athlete’s symptoms, injury stage, and sport.
Rehabilitation does not always need to wait until every symptom has disappeared. A randomized trial in adolescent athletes found that beginning supervised PT soon after diagnosis led to a faster return to sport and fewer recurrences of back pain than resting before starting PT. Early rehabilitation still involves protecting the injury and modifying sports participation. PubMed
How we progress rehabilitation at Summit Physical Therapy
Our goal is to help your teen become comfortable, strong, and prepared for the demands of their sport. The stages overlap, and we adjust them to the individual.
1. Reduce pain and manage aggravating activity
We identify which activities need to change and what the athlete can continue safely. That may mean temporarily reducing painful back bending, throwing, impact, or lifting.
Hands-on treatment may help surrounding muscle discomfort when appropriate. It supports the rehabilitation plan; it does not heal the fracture.
2. Restore appropriate mobility
We assess motion in the back, hips, and surrounding joints. Early exercises respect the injured bone and any medical restrictions.
As recovery progresses, we gradually restore the movement the athlete needs, including extension and rotation when appropriate.
3. Improve movement control and coordination
We teach the athlete to coordinate the trunk, pelvis, and hips during exercise and everyday movements. We then carry those skills into increasingly challenging tasks.
4. Rebuild muscle strength
We progressively strengthen the trunk, hips, and legs based on the athlete’s needs. Exercise selection and resistance change as tolerance improves.
5. Strengthen functional patterns
Squatting, hinging, lunging, pushing, pulling, and single-leg tasks help bridge the gap between basic exercise and athletic training.
When useful, VALD strength testing gives us objective information about muscle performance and helps guide training priorities.
6. Restore power
Sports require athletes to produce force quickly. Once appropriate, we introduce faster movements and power training that match the athlete’s activity.
7. Progress jumping, landing, and change of direction
For athletes whose sports require these skills, we gradually introduce impact, landing, acceleration, and cutting.
VALD ForceDecks testing can help assess jump performance and force production. These results inform rehabilitation; they do not measure fracture healing or independently clear an athlete for sport.
8. Build endurance and durability
A few comfortable repetitions are a starting point. We also build the capacity to tolerate repeated efforts, longer sessions, and the fatigue that comes with practice.
9. Return to specific sports and daily activities
We plan the transition from controlled drills to practice and competition, coordinating with the medical team and coaches as appropriate.
A dancer, baseball player, and soccer player need different progressions. Their rehabilitation should reflect that.
When can my teen return to sports?
Return should follow an individualized plan based on the medical recommendations, symptoms, movement, strength, and tolerance for progressively demanding activity.
At Summit Physical Therapy, we want to see how the athlete responds during a session, afterward, and as training volume increases. One good day is useful information; consistent tolerance tells us more.
When does back pain need urgent medical attention?
Seek emergency care for new loss of bowel or bladder control, numbness around the groin, or rapidly worsening leg weakness. Back pain with fever, unexplained weight loss, persistent night pain, or significant trauma also needs prompt medical assessment. American Academy of Pediatrics
Physical therapy for teen back pain in Summit, NJ
Whether your teen has recurring back pain or an established diagnosis of spondylolysis, stress reaction, or pars fracture, we can help clarify the next step and build a rehabilitation plan.
We frequently work with this diagnosis at Summit Physical Therapy. We understand the importance of recognizing a possible bone stress injury, involving a specialist when needed, and preparing athletes for a confident return.
We serve families in Summit, Short Hills, Millburn, Maplewood, Chatham, Florham Park, New Providence, Springfield, and South Orange.