Patellofemoral pain: EMS was an add-on to exercise
In short
In 36 women with patellofemoral pain, both groups completed 21 strengthening sessions over seven weeks. Adding 14 whole-body EMS sessions improved pain and reported function at three months, but did not test EMS as a replacement.
Whole-body electrical stimulation added to strengthening showed extra benefits for knee pain and reported function. The randomized trial assigned 36 women with unilateral patellofemoral pain to exercise alone or exercise plus whole-body electromyostimulation. It did not compare stimulation alone against exercise.
What differed between the two programs?
| Group | Strengthening | Whole-body EMS |
|---|---|---|
| Control | Three sessions weekly; 21 total | None added |
| Add-on group | Three sessions weekly; 21 total | Two sessions weekly; 14 total |
Hip and knee strengthening remained part of both programs. That distinction matters when reading advertising for recovery devices: this trial cannot establish that a home device reproduces the intervention, or that stimulation without exercise offers the same benefit. It also cannot fully separate the contribution of additional treatment contact from stimulation itself.
Which outcomes were followed for three months?
Pain and self-reported knee function were assessed before training, after seven weeks and at the three-month follow-up. Between-group Kujala function-score differences favored the add-on group by 5.61 points at seven weeks and 7.32 at three months. Pain was also lower at three months. Strength and step-down repetitions, however, were measured only before and after the seven-week intervention. Lasting objective strength benefits at three months were not demonstrated by those measurements.
What belongs in separate training records?
- Log the exercises, loads and repetitions agreed with the treating professional.
- Keep a separate note of pain and changes in everyday tasks such as stairs.
- If stimulation is added, distinguish its start date and completed sessions from the exercise record.
A rising load in fairlift is not a knee-recovery score. Muscle Index compares Big Three 1RM performance; it does not measure pain or diagnose readiness to progress. The related article on knee-extension range and kneecap pain addresses a different exercise variable. The present abstract does not supply stimulation intensity or a detailed exercise prescription, so it cannot become a do-it-yourself treatment plan.
This small trial involved women with a specific knee-pain diagnosis. Larger trials and longer objective follow-up are needed; discuss assessment and exercise limits with the treating professional.
Frequently asked questions
Can stimulation replace strengthening?
Both groups completed 21 strengthening sessions over seven weeks. The trial did not test stimulation alone.
Did benefits last three months?
Pain and reported function were assessed at three months. Strength and step-down repetitions were retested only at seven weeks, so their longer-term persistence is unknown.
Does this improve a healthy lifter's squat?
The participants were 36 women with unilateral patellofemoral pain. The result cannot establish squat 1RM or hypertrophy benefits in healthy lifters.
Source: PubMed (published )