ArticleEuropean journal of applied physiology2025
Regional flexion relaxation phenomenon in lumbar extensor muscles under delayed-onset muscle soreness: high-density surface electromyography insights.
Article in European journal of applied physiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper, 1 of them a synthesis that pooled it.
What it found
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Who cites it
1 citing paper in PubMed, 1 synthesis or guideline pooled it.
- The Effects of Lumbar Delayed Onset Muscle Soreness on Clinical, Biomechanical and Neuromuscular Outcomes: A Systematic Review and Meta-Analysis.European journal of pain (London, England) · 2026Pooled it
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Authors and funding
4 authors.
Funding
Abstract
purposeThis study aimed to investigate whether lumbar delayed-onset muscle soreness (DOMS) impacts the magnitude of the flexion relaxation phenomenon regionally.
methodsEighteen adult participants (9 men and 9 women) performed flexion extension movement under two conditions (with and without DOMS). Lumbar muscle activation strategies were recorded using high-density surface electromyography (HDsEMG) on both sides of the trunk. To determine the spatial distribution of flexion relaxation phenomenon, flexion relaxation ratio of muscle activity was computed for all electrodes of the HDsEMG grid and the coordinates of the centroid (average position of flexion relaxation ratio across the HDsEMG grid) in the mediolateral and craniocaudal axis were calculated.
resultsThe results revealed a cranial shift (~ 6 mm) of flexion relaxation phenomenon within the lumbar extensor muscles when DOMS was present (both sides: p < 0.05), possibly attributed to the increased recruitment of lumbar stabilizing muscles located caudally, which may serve as a guarding mechanism to pain.
conclusionThese results highlight the importance of evaluating the entire lumbar region when assessing the flexion relaxation phenomenon.
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