{ "types" : { "Bookmark" : { "pluralLabel" : "Bookmarks" }, "Publication" : { "pluralLabel" : "Publications" }, "GoldStandardPublication" : { "pluralLabel" : "GoldStandardPublications" }, "GoldStandardBookmark" : { "pluralLabel" : "GoldStandardBookmarks" }, "Tag" : { "pluralLabel" : "Tags" }, "User" : { "pluralLabel" : "Users" }, "Group" : { "pluralLabel" : "Groups" }, "Sphere" : { "pluralLabel" : "Spheres" } }, "properties" : { "count" : { "valueType" : "number" }, "date" : { "valueType" : "date" }, "changeDate" : { "valueType" : "date" }, "url" : { "valueType" : "url" }, "id" : { "valueType" : "url" }, "tags" : { "valueType" : "item" }, "user" : { "valueType" : "item" } }, "items" : [ { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2e0eb12714cb5e8c70bc4ef13a3f70c30/inspo5", "tags" : [ "stretch","epression","surae","force","performance","enhancement","reflex","triceps" ], "intraHash" : "e0eb12714cb5e8c70bc4ef13a3f70c30", "interHash" : "40953d65f08f042d8f840b9b2462a29b", "label" : "The stretch\u2013shortening cycle effect is not associated with cortical or spinal excitability modulations", "user" : "inspo5", "description" : "", "date" : "2025-06-20 14:16:43", "changeDate" : "2025-06-20 14:16:43", "count" : 3, "pub-type": "article", "journal": "The Journal of Physiology","publisher":"Wiley", "year": "2025", "url": "http://dx.doi.org/10.1113/JP287508", "author": [ "Lea\u2010Fedia Rissmann","Brent James Raiteri","Wolfgang Seiberl","Tobias Siebert","Daniel Hahn" ], "authors": [ {"first" : "Lea\u2010Fedia", "last" : "Rissmann"}, {"first" : "Brent James", "last" : "Raiteri"}, {"first" : "Wolfgang", "last" : "Seiberl"}, {"first" : "Tobias", "last" : "Siebert"}, {"first" : "Daniel", "last" : "Hahn"} ], "abstract": "It is unclear whether cortical and spinal excitability modulations contribute to enhanced stretch\u2013shortening cycle (SSC) performance. Therefore, this study investigated cortical and spinal excitability modulations during and following shortening of SSC contractions compared with pure shortening (SHO) contractions. Participants (n = 18) performed submaximal voluntary plantar flexion contractions while prone on the dynamometer bench. The right foot was strapped onto the dynamometer's footplate attachment, and the resultant ankle joint torque and crank arm angle were recorded. Cortical and spinal excitability modulations of the soleus muscle were analysed by eliciting compound muscle actional potentials via electrical nerve stimulation, cervicomedullary motor-evoked potentials (CMEPs) via electrical stimulation of the spinal cord, and motor-evoked potentials (MEPs) via magnetic stimulation of the motor cortex. Mean torque following stretch was significantly increased by 7 ± 3% (P = 0.029) compared with the fixed-end reference (REF) contraction, and mean torque during shortening of SSC compared with SHO was significantly increased by 12 ± 24% (P = 0.046). Mean steady-state torque was significantly lower by 13 ± 3% (P = 0.006) and 9 ± 12% (P = 0.011) following SSC compared with REF and SHO, respectively. Mean steady-state torque was not significantly different following SHO compared with REF (7 ± 8%, P = 0.456). CMEPs and MEPs were also not significantly different during shortening of SSC compared with SHO (P ≥ 0.885) or during the steady state of SSC, SHO and REF (P ≥ 0.727). Therefore, our results indicate that SSC performance was not associated with cortical or spinal excitability modulations during or after shortening, but rather driven by mechanical mechanisms triggered during active stretch.", "issn" : "1469-7793", "doi" : "10.1113/jp287508", "bibtexKey": "Rissmann_2025" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2f3554c02f79ed324fdf1437e5be63b62/inspo5", "tags" : [ "exercise","plyometric","enhancement","history","reflex","passive","performance","stretch","energy","dependence","elastic","contraction","eccentric" ], "intraHash" : "f3554c02f79ed324fdf1437e5be63b62", "interHash" : "52bab2525454ad268d0bb12e8879eb69", "label" : "Editorial: The Stretch-Shortening Cycle of Active Muscle and Muscle-Tendon Complex: What, Why and How It Increases Muscle Performance?", "user" : "inspo5", "description" : "", "date" : "2022-07-19 11:10:29", "changeDate" : "2022-07-19 09:10:56", "count" : 2, "pub-type": "article", "journal": "Frontiers in Physiology","publisher":"Frontiers Media SA", "year": "2021", "url": "https://doi.org/10.3389%2Ffphys.2021.693141", "author": [ "Wolfgang Seiberl","Daniel Hahn","Geoffrey A. Power","Jared R. Fletcher","Tobias Siebert" ], "authors": [ {"first" : "Wolfgang", "last" : "Seiberl"}, {"first" : "Daniel", "last" : "Hahn"}, {"first" : "Geoffrey A.", "last" : "Power"}, {"first" : "Jared R.", "last" : "Fletcher"}, {"first" : "Tobias", "last" : "Siebert"} ], "editor": [ "Tobias Siebert" ], "editors": [ {"first" : "Tobias", "last" : "Siebert"} ], "volume": "12", "doi" : "10.3389/fphys.2021.693141", "bibtexKey": "Seiberl_2021" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/261fedf1d36ba0727ea70b4ebe0ccf080/inspo5", "tags" : [ "contractile","mechanical","damping","enhancement","performance","contractions","stretch","shortening","PN2A-1","muscle","power","eccentric","behavior" ], "intraHash" : "61fedf1d36ba0727ea70b4ebe0ccf080", "interHash" : "2c45e90e696b09a75331acf51aae74e4", "label" : "Power Amplification Increases With Contraction Velocity During Stretch-Shortening Cycles of Skinned Muscle Fibers", "user" : "inspo5", "description" : "", "date" : "2022-07-19 11:10:29", "changeDate" : "2024-07-05 14:53:03", "count" : 7, "pub-type": "article", "journal": "Frontiers in Physiology","publisher":"Frontiers Media SA", "year": "2021", "url": "https://doi.org/10.3389%2Ffphys.2021.644981", "author": [ "André Tomalka","Sven Weidner","Daniel Hahn","Wolfgang Seiberl","Tobias Siebert" ], "authors": [ {"first" : "André", "last" : "Tomalka"}, {"first" : "Sven", "last" : "Weidner"}, {"first" : "Daniel", "last" : "Hahn"}, {"first" : "Wolfgang", "last" : "Seiberl"}, {"first" : "Tobias", "last" : "Siebert"} ], "volume": "12","abstract": "Muscle force, work, and power output during concentric contractions (active muscle shortening) are increased immediately following an eccentric contraction (active muscle lengthening). This increase in performance is known as the stretch-shortening cycle (SSC)-effect. Recent findings demonstrate that the SSC-effect is present in the sarcomere itself. More recently, it has been suggested that cross-bridge (XB) kinetics and non-cross-bridge (non-XB) structures (e.g., titin and nebulin) contribute to the SSC-effect. As XBs and non-XB structures are characterized by a velocity dependence, we investigated the impact of stretch-shortening velocity on the SSC-effect. Accordingly, we performed in vitro isovelocity ramp experiments with varying ramp velocities (30, 60, and 85% of maximum contraction velocity for both stretch and shortening) and constant stretch-shortening magnitudes (17% of the optimum sarcomere length) using single skinned fibers of rat soleus muscles. The different contributions of XB and non-XB structures to force production were identified using the XB-inhibitor Blebbistatin. We show that (i) the SSC-effect is velocity-dependent\u2014since the power output increases with increasing SSC-velocity. (ii) The energy recovery (ratio of elastic energy storage and release in the SSC) is higher in the Blebbistatin condition compared with the control condition. The stored and released energy in the Blebbistatin condition can be explained by the viscoelastic properties of the non-XB structure titin. Consequently, our experimental findings suggest that the energy stored in titin during the eccentric phase contributes to the SSC-effect in a velocity-dependent manner.", "doi" : "https://doi.org/10.3389/fphys.2021.644981", "bibtexKey": "Tomalka_2021" } ] }