ArticleEuropean journal of applied physiology2026
Intra- and intermuscular shear wave speed distributions in the human hamstrings during isometric and eccentric contractions.
Article in European journal of applied physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
Abstract
purposeHamstring strain injuries frequently occur near the biceps femoris long head (BFlh) proximal myotendinous junction. Unequal intra- and/or intermuscular mechanical properties may increase injury susceptibility by generating localised gradients in tissue mechanics and strain concentration; however, this remains unexplored under eccentric loading. We examined local shear wave speed (SWS), a measure reflecting tissue stiffness and force transmission, along the BFlh and semitendinosus (ST) during isometric (ISO) and eccentric (ECC) contractions.
methodsFifteen healthy males performed ISO and ECC knee flexions at 10%, 30%, and 50% of maximal voluntary torque (MVT). BFlh and ST SWS was measured at 30% (prox) and 50% (mid) of the thigh length using ultrasound elastography. BFlh pennation angle (PA), fascicle length (FL), and muscle thickness (MT) were also assessed.
resultsAbsolute SWS was lower proximally in BFlh across intensities and conditions, whilst ST showed lower proximal SWS only in ISO at 30% and 50%MVT. When normalised to passive values, intramuscular SWS differences disappeared during ECC but persisted in BFlh during ISO ≤ 30%MVT. Intermuscular SWS ratio (BFlh/ST) was 0.63-0.94 at rest and 10%MVT, increasing to 0.78-1.01 at higher intensities. Moderate correlations were found between BFlh architecture and proximal SWS during ECC only (PA: r = 0.62-0.65; FL: r = - 0.64 to - 0.66; MT: r = 0.57).
conclusionHamstring muscles exhibit region-specific SWS profiles, largely influenced by passive mechanical properties. This heterogeneity may contribute to localised strain concentrations and injury risk, highlighting a potential target for prevention strategies.
Indexed as
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.