Strength testing should be a non-negotiable during ACL rehab, yet roughly 50% of providers do not regularly test their patients.

What is strength testing?

Strength testing involves measuring the strength of various muscle groups, typically performed using a dynamometer or other specialized equipment that can provide accurate measurements to providers for clinical use and decision making.

Why is strength testing important? 

1. Helps to measure progress. All rehab, especially ACL rehab, is goal oriented. Strength testing helps to evaluate the effectiveness of the rehabilitation program and whether the patient is making progress in their recovery. By comparing strength measurements over the course of rehab, providers can determine whether the patient is on track to meet their goals and make adjustments to the program if necessary.

2. Helps compare and improve function. After ACL surgery, muscles are inhibited or become weak due to lack of use leading to muscular imbalances when compared to the non-affected side. One of the major goals of ACL rehab is to get the surgically repaired knee as symmetrical to the non-affected side as possible. Not only does symmetry in strength help with sport performance, it also reduces the risk of re-injury once the patient returns to sport. Regular strength testing uncovers any muscular imbalances that need to be addressed prior to being cleared for activities.

3. Reduces risk of re-injury. ACL re-injury rates are alarmingly high, largely because patients are cleared for activities before they have appropriate strength to complete these activities safely. Exercises such as walking, running, jumping, etc. all require baseline levels of strength in order to help ensure that force is being absorbed by muscles. When muscles are not strong enough to help absorb force, injury risk increases because force gets absorbed by the knee.

In conclusion, strength testing is a crucial component of ACL rehab that should not be overlooked. By measuring muscular strength, providers can assess progress, compare and improve function, and reduce risk of re-injury. If your provider does not regularly strength test you, go find yourself a new provider.

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