The Hidden Reason Your Knee Might Feel Stiff

One of the most common complaints we hear in sports physical therapy is simple:

“My knee just feels stiff.”

Most athletes assume the answer is stretching. They work on their quads, hamstrings, and calves. They add mobility drills and foam rolling.

Yet the stiffness often remains.

The reason is that many people misunderstand how the knee actually moves.

The Knee Is Not Just a Hinge

Most people think of the knee as a simple hinge joint. It bends and straightens, similar to a door hinge.

But in reality, the knee also rotates.

This rotational movement is subtle and difficult to see, which is why it is often overlooked. However, it plays a critical role in normal knee mechanics. When the knee bends and straightens, a small amount of rotation occurs at the same time.

If that rotation becomes restricted, the knee may feel stiff even if the muscles around it are flexible.

This is something we frequently identify during sports physical therapy assessments.

Why Stretching Does Not Always Solve Knee Stiffness

Athletes who experience stiffness with knee bending often focus on stretching their quadriceps or hamstrings. While those muscles can contribute to mobility limitations, they are not always the root cause.

If the rotational component of the knee is restricted, the joint may struggle to move smoothly through flexion and extension.

In these cases, stretching alone will not resolve the issue.

Sports physical therapy focuses on identifying the true source of the restriction, which may include joint mobility, movement mechanics, or coordination between different structures around the knee.

Addressing Knee Rotation in Sports Physical Therapy

A common approach we use in sports physical therapy is to first restore the missing mobility and then teach the body how to use it.

For example, improving internal rotation of the tibia, the shin bone, can sometimes reduce stiffness during knee flexion. Once that mobility improves, athletes must reinforce it with controlled movement so the body learns to incorporate it into normal motion.

Without that second step, mobility gains often disappear quickly.

Why This Matters for Athletes

Athletes place high demands on their knees through running, jumping, cutting, and lifting. If a joint cannot move properly, other areas of the body often compensate.

Over time, this can lead to:

Persistent stiffness
Decreased performance
Increased stress on surrounding tissues

Sports physical therapy helps athletes identify these hidden limitations so they can address the true cause rather than repeatedly stretching the wrong structures.

When to Seek Sports Physical Therapy

If your knee constantly feels stiff despite stretching and mobility work, it may be worth looking deeper.

A proper sports physical therapy evaluation can determine:

Whether the limitation is muscular or joint related
If rotational mobility is restricted
How movement mechanics may be contributing

Once the real limitation is identified, the right drills and strengthening strategies can help restore normal movement and reduce stiffness.

If you or your athlete are struggling with persistent knee stiffness, sports physical therapy can help uncover the hidden factors limiting your mobility and get you back to moving confidently.

Sports Physical Therapy: Why Stretching Is Not Always the Answer for Hip Pain

One of the most common requests we hear in sports physical therapy is:

“What should I stretch?”

Recently, a friend called me describing hip stiffness. He felt tight in the front of his hip and noticed a pinching sensation every time he squatted or lunged. Like many athletes, he assumed he just needed better stretches or mobility drills.

But here is the truth.

Not all stiffness is something you should stretch.

Understanding this distinction is critical in sports physical therapy, especially for athletes who squat, lunge, sprint, and lift regularly.

The Difference Between Tightness and Pinching

In sports physical therapy, we often talk about closing angle versus opening angle restrictions.

Every joint has a natural end range of motion. Something always stops the movement. The key question is what is doing the stopping?

If you feel a muscular stretch at the end of a motion, that is often an opening angle restriction. Muscles may be limiting you, and targeted mobility work can help.

But if you feel a sharp pinch in the front of your hip as you descend into a squat, that is often a closing angle restriction. In simple terms, structures within the joint are approximating too early. Stretching harder into that position will not solve the problem and may even aggravate it.

This is where proper sports physical therapy assessment makes all the difference.

The Hip “Garage” Analogy

Think of your hip like a car parking in a garage.

If there are boxes stacked in the back of the garage, the car cannot fully pull in. It sticks out the front.

Similarly, if the back of your hip is stiff, the ball of the femur can sit slightly forward in the socket. As you squat and the angle closes between your trunk and thigh, you may feel a pinch in the front of the hip.

The problem is not that the front is tight.

The problem is that the back is restricted.

In sports physical therapy, we address this by restoring posterior hip mobility and reinforcing proper mechanics with strength training. Exercises such as controlled hip mobility drills and movements like Romanian deadlifts help reposition and strengthen the hip so it can tolerate deeper ranges safely.

Why This Matters for Athletes

Athletes often default to stretching when they feel stiff. But in sports physical therapy, we know that incorrect self treatment can:

Waste valuable training time
Irritate the joint further
Reinforce faulty movement patterns
Delay return to full performance

This concept does not just apply to the hip. We frequently see similar patterns in the shoulder and the ankle, especially in athletes who lift, throw, run, or change direction at high speeds.

If you feel pinching in the front of your hip during squats or lunges, it is worth asking whether you are dealing with a joint mobility restriction rather than a muscle that needs stretching.

How Sports Physical Therapy Helps

Quality sports physical therapy is not just about giving exercises. It is about identifying what is truly limiting you.

We assess:

Joint mobility versus muscular restriction
Movement mechanics under load
Strength asymmetries
Sport specific demands

From there, we create a plan that restores mobility where it is needed and builds strength to support it.

If you are experiencing hip stiffness, pinching, or discomfort during training, do not assume stretching is the solution. The right diagnosis leads to the right intervention.

Sports physical therapy is about precision. When you address the true restriction, progress happens faster and more safely.

If you want help identifying what is limiting your movement, contact us. We will help you move better, train harder, and protect your long term performance.

Hidden injury risks in youth sports

Today’s article is from Dr. Samuel Kinney! Dr. Sam is a Performance Physical Therapist at our McLean location. In addition to being an amazing sports physical therapist and strength coach, Sam was a successful collegiate athlete. Learn more about Dr. Sam here. Enjoy!

What a great time of year to be a physical therapist! Our summer athletes that were injured or training with us are healthy and starting their fall sports seasons.

One of the most rewarding parts of being a sports physical therapist is seeing the athletes I helped return to the field and benefit from all their hard work from the summer.

But I can’t help but be a little nervous sometimes. There is always a risk of injury, and one of the greatest risks for a young athlete is specializing in one sport too early.

Sports specialization is defined as:

“intentional and focused participation in a single sport for most of the year that restricts opportunities for engagement in other sports and activities.”

Many athletes strongly desire to participate in their sport year-round and are pressured to do so. They have been led to believe that this will enhance their athletic success and potential to play “at the next level.” Yet, there is very little data to support this idea. On the contrary, there is strong support in the medical community for athletes to diversify their sporting activities during the off-season.

The main problem with sport specialization at a young age is that it increases an athlete’s risk for an overuse injury, and overuse injuries account for over 50% of injuries in young athletes. Common overuse injuries at CHP include back injuries like spondylolysis, foot and ankle problems, anterior knee pain, and muscle strains. Year-round play of one sport places continued stress through the same joints and tissues without the opportunity to recover.

How can we solve this problem?

First, a well-rounded strength and conditioning program with sport-specific considerations reduces injury risk by increasing the amount of work that the body can handle. As a result, athletes become more resilient to the stresses placed on them in sports. For example, improving the strength and stress-tolerance of a baseball pitcher’s rotator cuff protects against the high forces involved in pitching.

Second, participate in a secondary sport during the off-season of the main sport. This provides a break from the repetitive movements of the primary sport (e.g., repetitive throwing, hitting, jumping) and allows the athlete to explore different movement patterns. This can also improve performance in their primary sport by improving sporting decision-making and problem-solving and giving them a wider range of movements to utilize.

Finally, use the athlete’s age to guide the training load. A simple formula to use is:

Workload hours/week < age.

For example, a 12-year-old athlete should participate in their sport (including practices) less than 12 hours per week.

The topic of injury reduction is complex, and this is just scratching the surface of how we can reduce the risk of injury for youth athletes. If you are looking for ways to reduce the risk of injury for yourself or your child, contact us schedule an evaluation. We will consider all the factors at play and devise an individualized plan to keep you or your child in action!

What Does It Mean To Be “Out of Alignment?”

“My body feel out of alignment.”

“My <insert healthcare professional here> said that my hips are off.”

“I think I just need to be adjusted.”

These are examples of a few of the comments that patients may express in physical therapy or other injury rehabilitations settings.

The belief that we are like a vehicle that needs to be re-aligned is often the fault of the healthcare industry, including physical therapy.

In the past, healthcare providers would tell their patients that a part of their body is out of alignment and needs to be adjusted to put it back in place. They explain that this is the reason for any discomfort that may be present.

Thankfully, this is no longer taught by most healthcare providers as this thought process has been disproven.

Our bodies are incredibly resilient.

Our joints do not simply fall out of alignment. In fact, our bodies are designed to move and if we were constantly “in line”, it would be impossible to move anywhere!

So, what is happening when an area of our body feels “off”?

As we perform a movement repetitively, compensations and movement limitations become more noticeable.

One area of the body may be moving excessively, while another area of the body may be moving too little. For example, if your ankle mobility is limited during a squat, you will move excessively at the hips to pick up the slack, causing more stress in that area. As a result, pain, or the feeling of being out of alignment may occur in the hips/pelvis.

If you feel “off” or have been told that you are out of alignment, the solution is likely to begin with discovering what movement limitations may have led to this feeling in the first place. This information can then be used to teach you strategies to move and feel better!

Are you interested in discovering what solutions may be right for you? Contact us to find out more about our physical therapy services!