Our ACL Strong “Classic Course” helps basketball players:

CROSSFIRE athletes get 60% OFF!!!

Use your Crossfire coupon code at checkout

No one's high school athletic career should be cut short by a preventable injury


A specialized “neuromuscular training program” created by injury prevention expert, Dr. Leslie Desrosiers, DPT, OCS, CSCS, to help you move better, feel better, and safely protect your knees.

This 6-week online course includes:

Includes course access for the entire season (up to one year)

Step by Step Instructions to Register:

  1. Go to https://aclstrong.com/crossfire (You’re HERE!)
  2. Click “BUY NOW”
  3. Enter your Crossfire Coupon Code and click “Apply Coupon”
  4. Click “Proceed to Checkout”
  5. Enter your information (name, email address, etc), set a password, and Agree to Terms [NOTE: If you are an existing user, you will have to Login first]
  6. Click “Place Order”

THAT’S IT! You will be directed to your profile page with a link into the Classic Course!  You can START TODAY!!!

You’ll receive a Welcome email from Dr. Leslie, a confirmation email for your payment, and your login information (new accounts only). 

Use your Crossfire coupon code to get 60% OFF!!!


Over 1000 members have joined ACL Strong, and the feedback has been AMAZING! 


After injuring her knee in soccer, Isabelle’s pain wouldn’t go away. Fearing re-injury and having to play through the pain, Isabelle luckily found ACL Strong.

“I could tell that I was getting a lot stronger and that my knee was getting a lot better because I wasn’t feeling pain during practices all the time.”


Coach Linda is proactive about rehab with her basketball players, but found they often don’t have much time. She wanted a program that was easy and doable. After finding ACL Strong, Linda has now gone through the program with her players for two years and said it makes a big difference, seeing improvement in as little as 4 weeks.

“I really encourage you to do it as a team together.  It’s quick and quite effective.”


We offer a 30 day, no-questions-asked refund.  Over 1000 people have joined the ACL Strong program, and the feedback has been extremely positive.  Many people return each year to repeat the course!  The exercises are quick and easy to do, even for a busy middle-school, high school, or college student.  We’re so confident you’ll love the course that if for any reason you are not 100% satisfied with the course, we will refund 100% of your money.



I’m excited about helping the players and coaches from Crossfire Basketball get on the right path to protecting knees, preventing injuries, and playing better than ever!  We’ve seen too many ACL injuries in youth basketball.  These athletes deserve to go as far as their skills, commitment, and desire can take them, without preventable injuries getting in their way.  Let’s do this, Team Crossfire!  I’ll see you on the inside!Dr. Leslie Desrosiers, PT, DPT, OCS, CSCS

Dr. Leslie Desrosiers, PT, DPT, OCS, CSCS


The only requirement is a resistance mini band.  We highly recommend a Balance Trainer (i.e. BOSU) to get the most out of the balance/stability exercises, but it’s not required.  There are alternatives provided if you don’t have a BOSU, such as a pillow, foam pad, or dynadisc.  We also show how to use a foam roller and stretching strap if you have access to one, but these are optional.  See our EQUIPMENT page for more info.

You can enroll your team in 3 easy steps:

One: Complete our Team Discount form here. (CLICK HERE) 

Two: We will email you a Coupon Code and Registration instructions for each participant to sign-up individually.

Three: Coach and participants self-register and gain access to the course immediately!

Pricing is based on number of participants and grants a one year license to all who register with the team.  Complete our Team Discount form here (CLICK HERE) and we will email you the registration instructions and pricing details.

While the course is designed for individual participants, we understand that parents may purchase the course for their children to participate in together.  Doing the exercises together can be helpful for compliance, motivation, and keeping good form. Please keep the login credentials within your own family, as number of logins per day may be restricted and will impact progress through the course. 

The Classic Course is not intended for rehab from an existing injury without an evaluation by a medical professional or physical therapist first.  If you are cleared to play a sport and have NO precautions for weight-bearing, range of motion, jumping, and lateral cutting, then you can participate in the course.  We highly encourage participants NOT to push into pain or discomfort during the exercises.  We provide modifications for most exercises and participants should choose the intensity that they can perform with good form (and no pain).  We emphasize quality over quantity.  If pain is noted during an exercise, we ask participants to follow these steps:  1) Check your form, 2) Decrease Intensity or Impact, and 3) If pain persists, then simply skip that exercise.  After ACL reconstruction, we recommend waiting 12+ months to participate in the course.  Once you are cleared for running, jumping, and changing directions WITHOUT pain or limitations, then you may participate at 9 months post-op.

Yes, I love interacting with members.  You can email me for support any time!  I also encourage you to utilize the Facebook group for support.  Our Tribe is amazing and can help answer many of your questions as well.

The problem with searching for your own “injury prevention” exercises on Google or Youtube is that you are not getting a comprehensive program that addresses all 5 pillars of injury prevention.  It can be overwhelming to sift through hundreds of exercises, determine which are right for you, and make sure you are covering all aspects that are necessary for effective prevention.  You will likely stumble upon exercises that may or may not be appropriate for your level of fitness and body control. Choosing the wrong exercises, or doing exercises the wrong way, can be dangerous and may lead to injury.

Yes, you can log in from any device including your desktop, tablet, or mobile phone.

Purchasing the course gives you a personal license with lifetime access.  If you are a team or organization, purchasing the course grants you access for 1 year.  By this time, we find many of our teams and participants have incorporated the exercises and techniques into their normal routine.  If you need to use the course longer, you may buy an additional year’s license or register for the updated version of the course.  Please see our Team Inquiry page.

A long-term maintenance plan should include continuing with neuromuscular training exercises for about 15 minutes, 2-3 times per week during pre-season and through the duration of the season.  There are a couple of options to do this:

  1. Participants can repeat the course from the beginning, choosing the options/modifications that are appropriate for them.
  2. Participants can select exercises or modules from the course to repeat 2-3 times per week.
  3. Participants can choose to upgrade to the VIP Club membership, which holds the entire library of neuromuscular training exercises in the ACL Strong Vault, as well as a monthly routine, and a featured exercise each month.  You can utilize the “Vault” to create your own routines. 

Be Prepared with the Right Equipment:

Resistance Mini Band - $5

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