Double the Risk: Why Returning to Sport Too Soon After a Concussion is Dangerous
Hi, I’m Dr. Mark. Over the past five years, I’ve worked with hundreds of athletes—from NCAA swimmers and pro hockey players to weekend warriors—helping them recover from concussions, optimize their performance, and get back to what they love.
Today, we’re tackling a topic that doesn’t get enough attention: returning to sports too soon after a concussion can double your risk of injury. By the end of this blog, you’ll know why this happens and what you can do to reduce your risk and safely return to peak performance.
The Hidden Risks of Returning to Sport Too Soon
Many athletes believe that once their symptoms disappear, they’re ready to get back in the game. But the truth is, even when you feel fine, your body might not be fully recovered.
Studies have shown that athletes who return to sport within 90 days of a concussion face a 2–4 times higher risk of injuries like ACL tears, ankle sprains, or hamstring strains. These injuries can often sideline you longer than the concussion itself.
What’s Happening in Your Body After a Concussion?
The root of the problem lies in neuromuscular control—your brain’s ability to coordinate movement, balance, and reaction time. A concussion can disrupt this system, even after your symptoms resolve.
Key Changes in the Body Post-Concussion
Balance and Proprioception Deficits
Proprioception, or your body’s ability to sense its position in space, is often impaired after a concussion. This can lead to poor balance and awkward movements, making you more prone to injuries.
Delayed Reaction Times
Reaction time deficits can persist for up to two months, even after symptoms have subsided. This increases the risk of non-contact injuries, such as ankle sprains or knee tears, during dynamic sports.
Altered Biomechanics
Athletes recovering from a concussion often land with stiffer knees and an increased knee valgus (knees collapsing inward). These biomechanical changes put extra stress on ligaments, like the ACL, making injuries more likely.
PMID: 25968852
Long-Term Risks: It’s More Than Just Your Lower Body
Lower Body Injuries
The risks extend beyond the initial recovery period. Athletes with unresolved neuromuscular deficits have a significantly higher chance of sustaining lower extremity injuries—like ACL tears or hamstring strains—for up to a year post-concussion.
Upper Body Risks
It’s not just your legs that are at risk. Research shows that athletes recovering from concussions are more prone to upper extremity injuries, such as shoulder strains or sprains. This highlights that neuromuscular deficits can affect the entire body—not just the lower half.
How to Protect Yourself from Injury
So, how do you reduce your injury risk and safely return to sport? Here’s what you need to know:
1. Functional Assessments
Before returning to play, ask your concussion care team to perform dynamic tests like:
Jump-landing analysis
Reaction time assessments
Balance and coordination tests
These tests can identify lingering neuromuscular deficits that aren’t always obvious through symptom resolution alone.
2. Prioritize Full Recovery
Don’t rush back for the big game. A full recovery includes restoring your neuromuscular control—not just clearing symptoms.
Dr. Mark running high school football player through dynamic exertion protocol for RTP.
3. Incorporate Neuromuscular Re-Education
Rebuild your body’s coordination and reaction time with:
Balance drills: Try single-leg balance exercises combined with dynamic tasks like catching a ball.
Dynamic movements: Mimic game-like scenarios to prepare your body for high-pressure situations.
Reaction time training: Use tools or exercises that challenge your ability to react to sudden changes.
Final Thoughts
Returning to sport after a concussion isn’t just about how you feel—it’s about making sure your brain and body are fully ready to perform. Rushing back too soon can double your risk of injuries, and these setbacks can keep you out of the game far longer than a concussion ever would.
Take your recovery seriously, follow evidence-based guidelines, and work with professionals who understand concussion care.
Want More?
For more tips on concussion recovery, check out my blogs on sleep after a concussion and what you may not know about repetitive head impacts.
Have you ever rushed back to play after a concussion? Share your story in the comments below. Thanks for reading, and stay safe!
“Recover Faster, Perform Better, Live Your Best LifeWhether you’re recovering from a concussion, optimizing your performance, or looking to boost your overall health, I’m here to help. Take the first step toward feeling and performing your best.”