Science Sunday | What a rigid knee brace can control—and what the rest of the body still has to manage.
Patrick Mahomes Is Back. But Is Protecting the Knee Enough?
Patrick Mahomes is back on the practice field after surgery to repair tears in both his ACL and LCL.
He has been cleared to participate in training camp. For now, he is doing it in a functional knee brace. Mahomes has said he can still move and feel like himself in it, although he does not know how long he will continue wearing it. (Yahoo Sports)
That brace makes sense.
His reconstructed knee has to tolerate sprinting, planting, rotating, throwing from unstable positions and absorbing contact from some of the most powerful athletes in the world. A functional brace gives his medical team another way to limit unwanted movement while he rebuilds strength, confidence and control.
But it also opens a bigger conversation.
Protecting a knee and preparing a body to play football are not exactly the same thing.
Why braces remain the standard
The ACL helps control forward movement and rotation of the tibia beneath the femur. The LCL helps resist forces that push the knee outward and contributes to stability along the outside of the joint.
After those structures are injured and surgically repaired, a brace can provide an external restraint around the knee. Its rigid frame and hinges are designed to resist motion that could place the healing or reconstructed structures at risk.
That is the appeal: a brace provides something visible, adjustable and immediate. It can restrict a defined motion even before the athlete has fully restored the strength, timing and neuromuscular control that once managed that motion internally.
It can also give the athlete a greater sense of security.
Those benefits matter—especially following a multiligament injury like Mahomes experienced. His situation should not be reduced to the evidence surrounding a routine, isolated ACL reconstruction.
At the same time, bracing after ACL reconstruction is not as straightforward as most people assume. The American Academy of Orthopaedic Surgeons says functional bracing is not necessarily required after a successful ACL reconstruction. Its clinical guideline found that current evidence has not demonstrated a clear benefit from functional bracing during return to sport after an isolated primary ACL reconstruction. (OrthoInfo)
That does not mean braces have no role.
It means controlling the joint from the outside is only one part of restoring an athlete’s ability to move.
A brace can control motion. It cannot make force disappear.
Every time Mahomes plants his foot, the ground pushes back.
That force still has to be managed somewhere within his body.
The brace may resist a portion of the unwanted translation or rotation at the knee. Some mechanical force is transferred through the brace’s frame, straps and contact points against the leg. The athlete may also change his knee position, muscle recruitment, stride or landing strategy while wearing it.
But the demand of the movement does not vanish.
It is managed through the entire kinetic chain:
Foot. Ankle. Knee. Hip. Pelvis. Trunk.
The ankle, knee and hip continuously adjust their relative contributions to support the body and absorb force. When the contribution of one area changes, the other areas participate differently. (PubMed)
That redistribution is not automatically harmful. In rehabilitation, changing how force is managed can be intentional and necessary.
The issue is whether the athlete is rebuilding an efficient movement strategy—or simply finding a new way around the protected joint.
The body will always find a solution
Elite athletes are exceptionally good at completing the task in front of them.
That can be an advantage. It can also hide compensation.
An athlete can run, throw and cut without using the recovering leg normally. He may generate more motion through the hip. Push harder through the opposite leg. Rotate differently through the pelvis. Shorten the time spent on the reconstructed side. Or stiffen the entire lower body to create a feeling of control.
The play still gets made.
But the work may no longer be distributed the same way.
Research following ACL reconstruction has identified persistent differences in knee loading during dynamic movement, sometimes six months to two years after surgery. Hip, pelvis and trunk mechanics also influence what happens at the knee. (PubMed)
This is why being “cleared” cannot be the only measure of readiness.
Range of motion matters. Strength matters. Balance matters. Psychological readiness matters. So does the athlete’s ability to absorb, transfer and redirect force through the full system. Current return-to-play guidance reflects that broader view. (AAOS)
The muscles are part of the protection system
A stable knee is not created by ligaments alone.
The timing and coordination of the muscles surrounding the knee help control how the tibia moves beneath the femur. In particular, coordinated hamstring and quadriceps activity can affect both knee motion and the force experienced by the ACL. Laboratory research has shown that hamstring co-contraction can reduce anterior tibial translation, internal rotation and ACL force under specific loading conditions. (PubMed)
That distinction matters.
A brace provides external control.
The neuromuscular system creates internal control.
The long-term goal of rehabilitation is not simply to surround the knee with more structure. It is to restore the body’s ability to recognize position, recruit the right muscles at the right time and distribute work across the entire chain.
And bracing does not produce the same muscular response in every athlete. Studies have found highly individual changes in muscle-firing patterns when functional braces are worn. In some athletes the changes appear favorable; in others they do not. (PubMed)
Where a different approach begins
This is where Tighties enters the conversation—not as a substitute for Mahomes’ brace, surgery or rehabilitation, but as a different category of intervention.
A knee brace begins at the injured joint.
Tighties begins with how the body works together.
The Stabilizer aligns the hips and pelvis, cues the muscles that help protect the joints, and helps the lower body move as one connected system. Instead of rigidly stopping movement at a single location, the Tighties Strapping System™ applies adjustable resistance across the body while the athlete moves.
That resistance is designed to create stronger sensory input and encourage more muscular participation in real time.
The objective is not to immobilize the knee.
It is to help more of the body participate in controlling it.
For an athlete returning from knee surgery, that creates an important potential role—once cleared by the athlete’s medical team:
- Reinforcing hip and pelvic positioning during movement
- Cueing the muscles above and around the knee
- Encouraging the lower body to work as a connected chain
- Helping the athlete recognize and reduce compensatory movement patterns
- Progressing from protected movement toward internally controlled movement
The brace and Tighties therefore answer two different questions.
The brace asks: How do we prevent this knee from moving too far in a vulnerable direction?
Tighties asks: How do we help the body create better control before the knee reaches that position?
What could this mean for Mahomes?
No one outside Mahomes’ medical and performance team knows his complete surgical procedure, examination findings, strength measurements or return-to-play plan. It would be irresponsible to prescribe a product or question his current care from a distance.
But his return gives us a valuable way to think about modern rehabilitation.
In the early phase, protection is essential.
As training progresses, protection alone is not enough. The athlete must recover coordinated movement under speed, fatigue, rotation, unpredictable contact and force.
For Mahomes, that means more than testing the stability of his left knee.
It means examining:
How does he load the left leg when he drops back?
Does he rotate evenly through his hips and pelvis?
Can he decelerate without shifting away from the reconstructed side?
Does his trunk compensate when he plants and throws?
Can he maintain those mechanics late in practice, when fatigue begins changing muscular timing?
And eventually:
Can his body protect the knee—not only through a rigid structure around it, but through the coordinated strength and control of the entire system?
That is the opportunity we see in movement technology.
Not replacing the brace before the knee is ready.
Building the body that can eventually rely on it less.
Because getting back on the field is one milestone.
Getting the whole body working together again is the real return.
