Who's Afraid of Electrical Stimulation? Let's Revisit the Application of NMES at the Knee.
Elanna K Arhos, Naoaki Ito, Airelle Hunter-Giordano and 3 others
PMID 37904496WHAT IT FOUND
High-intensity NMES is critical for restoring quadriceps strength after knee injury, yet many clinicians underdose it.
Testing five devices showed only two consistently allowed users to reach the necessary 50% of maximum voluntary contraction, highlighting that device choice and patient education determine treatment success.
Key findings
01Only two of the five tested electrical stimulators allowed the majority of healthy participants to achieve a therapeutic dose of at least 50% of their maximum voluntary contraction.
02The Chattanooga Continuum was the most effective device, with four of five participants achieving doses above 50% of their maximum voluntary contraction.
03The Dynatronics Solaris 709 Plus produced the highest torque at 50% of its capacity but was the least comfortable, with three of five participants unable to tolerate settings beyond that point.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The device testing was performed on only five healthy individuals, not on patients with knee injuries or quadriceps inhibition. The authors state that tolerance thresholds may differ in a clinical sample, meaning the results might not perfectly predict how patients with pain or weakness will respond. This is a narrative review and technical report, not a randomized controlled trial, so it does not prove that one specific device leads to better long-term patient outcomes compared to another. The authors reached out to 36 companies, but only 5 provided devices for testing, so the comparison is limited to a small subset of available market products.
Declared interests
The authors state they reached out to companies for sample devices. The paper does not explicitly list financial conflicts of interest or funding sources for the device testing itself, though the work was supported by the NIH.
The easy way to misread this
Do not interpret the device testing results as a definitive ranking of which machine will produce the best clinical outcomes for patients. The test was conducted on healthy volunteers with no muscle inhibition or pain, so the comfort and tolerance levels observed may not transfer directly to post-surgical patients.