ArticleJournal of athletic training2023
Quadriceps Neuromuscular Function During and After Exercise-Induced Fatigue in Patients With Patellofemoral Pain.
Article in Journal of athletic training, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06407414 (The Effect of Neuromuscular Exercise Program on Strength, Balance, Sleep Quality and Functionality in Patellofemoral Pain Syndrome), which is not on this map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
The Effect of Neuromuscular Exercise Program on Strength, Balance, Sleep Quality and Functionality in Patellofemoral Pain Syndrome
Who cites it
4 citing papers in PubMed, 6 citations in OpenAlex.
- Intracortical inhibition, corticospinal excitability and voluntary activation in people with and without patellofemoral pain.Experimental physiology · 2026Article
- Translational rehabilitation strategies for canine medial patellar luxation: insights from human patellofemoral pain syndrome.Frontiers in veterinary science · 2026Review
- Validity and Agreement of a Portable Dynamometer in Evaluating Hip Strength and Rate of Torque Development: Influence of Fixation Methods.International journal of sports physical therapy · 2025Article
- Individuals with patellofemoral pain have impaired self-reported and performance-based function: Systematic review with meta-analysis and meta-regression.Journal of athletic training · 2024Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
contextExercise-induced fatigue reduces muscle force production and motoneuron pool excitability. However, it is unclear if patients with patellofemoral pain (PFP) experience further loss in quadriceps neuromuscular function due to fatigue during exercise and postexercise.
objectiveTo observe how quadriceps maximal strength, activation, and force-generating capacity change during and after repetitive bouts of isokinetic knee-extension exercise in patients with PFP.
designCross-sectional study.
settingLaboratory. PATIENTS OR OTHER
participantsTwenty-two patients with PFP (visual analog scale mean pain severity = 4.2 of 10 cm, mean symptom duration = 38.6 months) and 19 healthy control individuals matched on age and body mass index. MAIN OUTCOME MEASURE(S): Quadriceps peak torque (PT), central activation ratio (CAR), and rate of torque development (RTD) were assessed at baseline and immediately after every 5 sets of knee-extension exercise (times 1-5). Participants continued knee-extension exercises until the baseline quadriceps PT dropped below 50% for 3 consecutive contractions.
resultsNo group-by-time interaction was observed for quadriceps PT (F5,195 = 1.03, P = .40). However, group-by-time interactions were detected for quadriceps CAR (F5,195 = 2.63, P= .03) and RTD (F5,195 = 3.85, P = .002). Quadriceps CAR (-3.6%, P = .04, Cohen d = 0.53) and RTD (-18.9%, P = .0008, Cohen d = 1.02) decreased between baseline and time 1 in patients with PFP but not in their healthy counterparts (CAR -1.9%, P = .86; RTD -9.8%, P = .22). Quadriceps RTD also decreased between times 4 and 5 in patients with PFP (-24.9%, P = .002, Cohen d = 0.89) but not in the healthy group (-0.9%, P = .99).
conclusionsPatients with PFP appeared to experience an additional reduction in quadriceps activation, force-generating capacity, or both during the early and late stages of exercise compared with healthy individuals. Clinicians should be aware of such possible acute changes during exercise and postexercise and use fatigue-resistant rehabilitation programs for patients with PFP.
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Registered trials
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