Author: Zachary Cohen

Dr. Zac began his career working in professional sports. He noticed a large discrepancy between the quality of care that elite athletes receive when compared to the normal active public. This inspired him to create Cohen Health and Performance, a place that treats everyone as if they are a professional athlete! He graduated summa cum laude from Northeastern University in 2011 with his Doctorate in Physical Therapy, and also became a Certified Strength and Conditioning Specialist (CSCS). While at Northeastern he worked as a Physical Therapy Graduate Assistant for the New England Patriots, and served as a strength and conditioning coach for Northeastern University athletics. Prior to moving to Maryland, Zac was a Performance Physical Therapist with EXOS (formerly known as Athletes' Performance) in Dallas, TX where he treated and trained the world's most gifted athletes from throughout the NFL, MLB, NBA, MLS, and various Olympic teams.

ACL Physical Therapy: How We Determine When It’s Safe to Return to Sport

Guest Post by Dr. Ethan Lennox, ACL Rehabilitation Specialist at Cohen Health and Performance (CHP)

One of the toughest challenges athletes face after ACL surgery is knowing whether they are truly ready to return to play. Getting this wrong can have serious consequences, not only a higher risk of re-tearing the repaired ACL, but also the possibility of injuring the other knee or sustaining a completely new lower body injury.

If you’re an athlete, parent, or coach navigating the ACL recovery process, this guide will walk you through the objective criteria that determine readiness for a safe return.

Why Time Alone Isn’t Enough

A safe return to sport after ACL surgery isn’t about simply waiting 6, 9, or 12 months. At CHP, our ACL physical therapy program goes beyond the calendar. We use specific benchmarks for strength, movement quality, knee health, and confidence.

For athletes in cutting or pivoting sports, we typically recommend at least 9–12 months before full competition, as research shows that early return carries a much higher risk of re-injury. Our goal is not just to “clear” an athlete, but to build a durable return that lasts.

What Really Determines Readiness?

1. Strength

Strength is the foundation of ACL physical therapy. But it’s not just about moving heavy weight in the gym. The question is:

Can the athlete produce strength quickly in the chaos of sport?
Can they tolerate the workload of practices and games?

We focus heavily on restoring quadriceps strength to sport-specific demands, not just symmetry between legs. A common benchmark is ≥ 3.0 Nm/kg of knee-extension torque relative to body weight. Symmetry matters, but hitting an absolute strength threshold is what keeps knees safe during high-speed stops and cuts.

2. Force-Plate Testing

Traditional field tests often miss hidden deficits. At CHP, our ACL physical therapy program uses force-plate technology to analyze how each leg produces and absorbs force during jumps, landings, and change-of-direction tasks. To learn more about our forceplates, check out this link.

We track asymmetry (aiming for ≤10%) and test both when athletes are fresh and fatigued. This helps us individualize rehab, catch weaknesses before they become injuries, and make safer clearance decisions.

3. Movement Quality

Numbers matter, but how an athlete moves under fatigue is just as critical. During ACL rehab, we look for:

Controlled deceleration
Proper knee and hip alignment
Strong trunk stability
Quiet, efficient landings at game speed

By combining movement analysis with force-plate data, we ensure athletes are not just strong on paper—but resilient in real game conditions.

4. Knee Health

A successful ACL recovery also depends on the joint’s response to load. Non-negotiables include:

Full, pain-free range of motion
No swelling or irritation after training
Zero “giving way” episodes

If the knee flares up as we increase intensity, we scale back. Just because the calendar says “9 months” doesn’t mean the knee is ready.

5. Confidence

Physical readiness means little without mental readiness. At CHP, our ACL physical therapy program uses validated questionnaires like the ACL-RSI (Return to Sport after Injury) to track confidence. Scores in the mid-60s or higher, paired with strong physical metrics, usually indicate safe readiness.

We also coach mindset—helping athletes rebuild trust in their body is just as important as rebuilding strength.

Clearance Does Not Mean Full Game Readiness

“Cleared” to return to sport means an athlete can begin practicing. It does not mean they’re ready for full minutes or their pre-injury role. Building back to game-day fitness requires another 6–12+ weeks of gradual progression:

Non-contact practice and controlled drills
Controlled contact with planned rest
Increased intensity and practice density, monitoring workload
Gradual introduction of limited game minutes

This measured progression is how we prevent setbacks and ensure long-term success.

How CHP Puts It All Together

At Cohen Health and Performance, our clearance testing includes:

Strength testing with precise benchmarks
Force-plate assessments for braking and propulsion
Movement quality reviews under fatigue
Knee health evaluation for calm, stable joints
Confidence tracking for mental readiness

From there, we design a stepwise return-to-play plan that gradually increases training load and game minutes while monitoring next-day knee response.

Our philosophy is simple: earn the right to do more, then prove you can repeat it.

If you or your athlete is recovering from ACL surgery, don’t settle for a clearance based only on time or basic hop tests. A true ACL physical therapy program should integrate strength, force-plate data, movement analysis, joint health, and confidence.

At CHP, our ACL specialists are committed to helping athletes not only return safely, but come back stronger than before.

If your athlete is working toward a safe, confident return to sport, our ACL rehabilitation team would love to guide the process. Contact us here.

What Your Patient Experience Tells You About Your Provider

When I first moved to the DC area, I had to find a new dermatologist. With pale skin and a bald head, I knew I needed someone I could rely on. What I didn’t expect was just how different the experience of healthcare could be from one provider to the next.

My first attempt went something like this:
I called the office, asked for an appointment, and was told the soonest available was six weeks away. When I explained that I had a conflict, I was told it would actually be six months before I could get in. Not exactly encouraging but I made it work.

When I finally arrived for the appointment, no one looked up from behind the desk, no one greeted me, and I was handed a clipboard without so much as a “thank you.” When the doctor did see me, it was for maybe three minutes. He seemed rushed, didn’t answer my questions, and was clearly just trying to get to the next patient.

Unfortunately, this kind of experience is all too common in healthcare.

Later, I found another dermatologist, and the difference was night and day. The staff answered the phone with warmth, greeted me by name when I arrived, and the doctor took the time to listen. She didn’t spend tons of time with me, but she was present, thorough, and made me feel valued.

The way you’re treated during the process often reflects the quality of care you’ll receive.

How We Approach Care at Cohen Health and Performance

At Cohen Health and Performance (CHP), we’ve built our model of care around the kind of experience every patient deserves. If you’re looking for physical therapy near you in Bethesda, here’s what makes us different:

Here’s what makes us different:

One-on-One Sessions: Every appointment is a full hour with your Doctor of Physical Therapy—no bouncing between patients, no rushing.
Personal Connection: We know your name when you walk in, and we take pride in making every patient feel welcome.
Full Presence: During your session, our entire focus is on you. We answer your questions, explain the “why” behind your program, and adjust as needed.
Between-Session Support: Need something outside of your appointment? Our team is available through our patient portal or a quick call to make sure you’re supported every step of the way.

Whether you’re an athlete recovering from injury, an active adult wanting to stay strong, or a parent helping your child navigate youth sports, your experience matters just as much as the treatment itself.

Choosing Physical Therapy in Bethesda

If you’re looking for physical therapy in Bethesda, we encourage you to ask yourself:

Do they listen to me?
Do they treat me like a person, not a number?
Are they invested in my success inside and outside the clinic?

At CHP, our answer to all three is a resounding yes.

So if you want a healthcare team that’s truly in your corner—committed to your goals, your progress, and your overall experience—we’d love to help.

Maybe You Don’t Need Rotator Cuff Surgery After All…

When someone hears the words “rotator cuff tear,” the first thought is often surgery. But many people with rotator cuff tears (even full-thickness ones) get better without ever going under the knife. At Cohen Health & Performance, we see this every day, and the latest research continues to back it up.

What the Research Says About Rotator Cuff Tears

At the Mid-Atlantic Shoulder and Elbow Symposium, Dr. John Kuhn of Vanderbilt University presented a study following nearly 500 patients with rotator cuff tears. His team found that 75% of patients improved with physical therapy alone—even when the tears were large or full-thickness, as long as they were atraumatic (developed over time, not from a sudden injury).

Even more impressive? These results held up over 10 years. Many patients regained shoulder function, reduced their pain, and returned to the activities they enjoyed, without surgery.

Other studies show that even when rotator cuff repairs are performed, the repaired tissue often re-tears. Surprisingly, many patients still feel better functionally after rehab. This suggests that the real difference-maker may be the physical therapy and rehabilitation process, not just the surgery itself.

Why Rotator Cuff Physical Therapy Works

So how does physical therapy help when the rotator cuff itself is damaged? At CHP, our shoulder physical therapy programs focus on much more than just the torn tendon. We work to strengthen and coordinate the entire shoulder complex, including:

Rotator cuff strengthening: Targeted exercises to build resilience in the cuff itself.
Scapular control: Training the muscles around the shoulder blade to support the shoulder joint effectively.
Trunk and core integration: Teaching your body how to move as a unit so your shoulder isn’t overloaded during sports or daily activities.

By improving strength, mechanics, and control, we help the shoulder function more efficiently, reducing pain and restoring performance, even in the presence of a tear.

When Surgery Still Makes Sense

Of course, surgery isn’t off the table for everyone. In cases of traumatic injury (like falling directly on the arm), or when physical therapy fails to provide relief, surgical repair may be the right option. But in many cases, trying shoulder physical therapy first is the safer, more effective, and less invasive choice.

Should You Try Physical Therapy Before Surgery?

If you have shoulder pain or a diagnosed rotator cuff tear, you don’t have to rush into surgery. The best next step is often a structured program of shoulder physical therapy.

The worst-case scenario? It doesn’t solve the issue, and surgery becomes necessary.
The best-case scenario? You avoid surgery altogether and get back to the activities you love—stronger than before.

If you are ready to take the next step, contact us and schedule your evaluation to solve your shoulder pain and return to the activities that you love.

Get It Girl (new program announcement)!

Today we have a special guest post and announcement from Dr. Catherine Biddle!

Dr. Biddle here. As a former collegiate gymnast, I know firsthand how essential weightlifting and targeted strength training are to athletic success—both individually and as a team. Unfortunately, when I was a high school athlete, those benefits were not emphasized. At the time, the common misconception that females shouldn’t—or didn’t need to—be in the weight room was still very present. Looking back, I believe that missing out on proper strength training contributed to the major injuries that sidelined me and kept me away from the sport I loved (at least this gave me more experience on the patient side of physical therapy!).

That’s exactly why I created Get It Girl—a small-group strength training program designed specifically for girls ages 11–14 who want to build confidence, train safely, and unlock their full athletic potential.

In this program, your daughter will get:

8 Weeks of In-Person Coaching — Focused on strength, technique, and safe movement.
4-Week At-Home Plan — To keep making progress between sessions.
Exercise Video Library — Step-by-step demos with form cues she can use anytime.

Spots are extremely limited—only 5 spots remain—so don’t wait. Click here now to learn more, reserve your daughter’s place and give her the foundation she needs to stay safe, grow stronger, and thrive in her sport.

If you have any further questions, feel free to reply to this email as well.

Don’t let this opportunity pass by—help your daughter build the strength and confidence she deserves!

-Dr. Catherine Biddle

Shoulder Pain Physical Therapy: Understanding and Managing Shoulder Instability

In just a couple of weeks, I’ll be part of a panel at the Mid-Atlantic Shoulder and Elbow Society Conference, sitting alongside several orthopedic surgeons as the lone physical therapy representative. Our panel topic: shoulder instability—a complex condition that affects many active adults and young athletes.

Why Shoulder Instability Matters

Shoulder instability is a challenging issue because it can be caused by a variety of factors and present in several different ways. The shoulder is the most mobile joint in the human body, but that same mobility makes it the most unstable.

With great mobility comes great responsibility. When the ligaments and tendons that normally stabilize the shoulder can’t provide enough support, the demand shifts to our muscles and nervous system to keep the joint under control. This is where physical therapy becomes essential.

How Physical Therapy Helps with Shoulder Pain and Instability

A well-designed rehab program for shoulder instability doesn’t just treat pain—it addresses the underlying mechanics that protect the joint and restore performance. Proper physical therapy can:

Improve ribcage and shoulder blade control – helping reduce stress on the shoulder joint.
Strengthen the rotator cuff – allowing it to more effectively stabilize the joint during activity.
Integrate improvements into movement strategies that carryover to sport – ensuring athletes and active adults can safely return to the demands of their sport or daily life.

Rehab vs. Surgery: Making the Right Choice

While there are times when surgery is necessary, physical therapy for shoulder pain and instability can often help determine whether non-surgical care is a viable option. The best surgery is the one you can avoid. Once a shoulder has been operated on, it’s never quite the same—the tissue has been altered, and function changes over time.

That’s why early intervention is so important, especially for young athletes such as baseball players who place high demands on their shoulders. Addressing pain and instability early can make all the difference in avoiding long-term damage and reducing the likelihood of surgery.

Take Action Early

If you or your athlete is dealing with shoulder instability or persistent shoulder pain, don’t wait. Getting evaluated by a skilled physical therapist can help you understand the cause, create a personalized plan, and in many cases, avoid the need for surgery.

Athletic Physical Therapy for Hypermobility

I’ve been practicing as a physical therapist for nearly 15 years, and one of the biggest changes I’ve seen in that time is the increasing number of people coming in with concerns about joint hypermobility. Some have been formally diagnosed with conditions like Ehlers-Danlos Syndrome or Hypermobility Spectrum Disorder, while others simply recognize that their joints are “loose” and it’s causing pain or limiting their performance.

The increased awareness is a good thing. Many people now understand that hypermobility can create unique challenges — but also potential advantages — especially for athletes and active adults. Let’s break down what that means, and how physical therapy for hypermobility can help.

What Is Hypermobility and Why Does It Matter?

Hypermobility refers to joints that move beyond the normal range of motion. Some people are naturally stiffer, while others are naturally looser — and this is all normal. But when joints are excessively mobile, problems can arise.

For example:

Benefits: In sports like gymnastics, dance, or baseball, extra mobility can be a huge asset. A pitcher’s ability to throw, or a gymnast’s ability to achieve extreme positions, often comes from this mobility.
Risks: Without proper strength, those same joints may lack stability. This can lead to pain, frequent sprains, hyperextension injuries (such as knees that bend backward), or even dislocations in vulnerable joints like the shoulder.

Why Stretching Isn’t the Answer

If you’re hypermobile, you don’t need more stretching. Your tissues are already like loose elastic bands — they can lengthen easily, but they don’t always provide enough support or rebound.

What you really need is protective stiffness. Think of it as giving that elastic band more “snap” so it can put on the brakes when stretched too far. This stiffness not only protects your joints but also adds athletic qualities like spring, bounce, and efficiency.

The Role of Physical Therapy for Hypermobility

When our physical therapists at Cohen Health and Performance work with athletes or active adults who are hypermobile, our focus is on strength training and joint control rather than flexibility. A tailored hypermobility physical therapy program may include:

1. Foundational Strength Training

Building muscle strength around joints is the first step. Strong muscles provide the support that loose ligaments and tendons can’t.

2. Isometric Exercises

Isometric holds — such as wall sits or split squat holds — help build protective stiffness in specific positions.

3. End-Range Strength Training

Athletes with hypermobility often have extreme ranges of motion. But can they control those ranges? Strengthening at the end of a joint’s range (such as the shoulder in overhead positions) helps protect against dislocations and injuries where the joint is most vulnerable.

Signs You May Benefit from Physical Therapy for Hypermobility

You may want to seek out a physical therapist if you:

Experience joint pain in multiple areas
Notice your knees, elbows, or fingers hyperextend past straight
Have a history of recurrent sprains or dislocations
Feel like your joints “give out” during activity
Want to safely improve performance in a sport that demands extreme mobility

Hypermobility isn’t always a problem — in fact, it can be a real advantage in the right sport. But without strength and stability, it can quickly become a source of pain and injury.

At Cohen Health and Performance, we specialize in helping athletes and active adults with hypermobility build strength, develop protective stiffness, and optimize performance. Whether you’ve been diagnosed with a hypermobility-related condition or you’ve simply noticed your joints feel “too loose,” we can create a personalized physical therapy and strength training program to help you stay healthy and strong.

If you’re ready to take control of your hypermobility, contact us today to schedule an evaluation.