{ "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/2bdb55aca3ae7eac8dc1d01764e0773a3/inspo5", "tags" : [ "stretch","muscle-tendon","siebert","unit","muscle","Eccentric","action","active","stretch-shortening","cycle" ], "intraHash" : "bdb55aca3ae7eac8dc1d01764e0773a3", "interHash" : "ded4877e88b626fe8d1872f00b7a2a53", "label" : "Unlocking the benefit of active stretch: The Eccentric muscle action not the preload maximizes muscle-tendon unit stretch-shortening cycle performance", "user" : "inspo5", "description" : "", "date" : "2024-07-01 13:13:24", "changeDate" : "2024-07-01 13:13:24", "count" : 2, "pub-type": "article", "journal": "Journal of Applied Physiology","publisher":"American Physiological Society", "year": "2024", "url": "http://dx.doi.org/10.1152/japplphysiol.00809.2023", "author": [ "Tobias Goecking","Denis Holzer","Daniel Hahn","Tobias Siebert","Wolfgang Seiberl" ], "authors": [ {"first" : "Tobias", "last" : "Goecking"}, {"first" : "Denis", "last" : "Holzer"}, {"first" : "Daniel", "last" : "Hahn"}, {"first" : "Tobias", "last" : "Siebert"}, {"first" : "Wolfgang", "last" : "Seiberl"} ], "editor": [ "Tobias Siebert" ], "editors": [ {"first" : "Tobias", "last" : "Siebert"} ], "abstract": "Stretch-shortening cycles (SSCs) outperform shortening contractions preceded by isometric contractions in terms of enhanced force/torque, work, and power production during shortening. This so-called SSC-effect is presumably related to the active muscle stretch before shortening in SSCs. However, it remains unclear whether the stretch-induced higher preload level or stretch-induced history dependence effects maximize the SSC-effect. Therefore, we analyzed fascicle behavior, MTU shortening work, and torque/force (N=12 participants) via ultrasound and dynamometry during electrically stimulated submaximal plantar flexion contractions from 10° plantarflexion to 15° dorsiflexion. To elucidate the effects of preload level and preload modality (i.e. contraction type) on shortening performance, muscle-tendon unit shortening was preceded by fixed-end (SHO), active stretch (SSC), and preload-matched fixed-end (MATCHED) contractions. Prior to shortening MATCHED and SCC had the same preload level (1% torque difference), similar joint position and muscle fascicle lengths. Compared with SHO, shortening work was significantly (p<.001, partial η2=.749) increased by 85% and 55% for SSC and MATCHED, respectively, with SSC shortening work being significantly higher than MATCHED (p=.016). This indicates that preload contributes by 65% to the overall SSC-effect, so that 35 % need to be referred to stretched-induced history dependent mechanisms. Additionally, SSC showed larger fascicle forces at the end of shortening (p<.001) and 20% less depressed isometric torque following shortening compared with MATCHED (p<.001). Since potential decoupling effects by the series elastic element were controlled by matching the preload levels, we conclude that the difference between SSC and MATCHED is related to stretch-induced long-lasting history dependent effects.", "language" : "English", "issn" : "1522-1601", "doi" : "10.1152/japplphysiol.00809.2023", "bibtexKey": "Goecking_2024" } , { "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/2f2b33a8fab72eb8df1b47397fd2b4d4b/inspo5", "tags" : [ "fibers","Eccentric","affects","velocity","contractions","Tomalka","Inspo","PN2A-1","muscle","Siebert","Cross-bridges","activated","Weidner" ], "intraHash" : "f2b33a8fab72eb8df1b47397fd2b4d4b", "interHash" : "404ae626cf3fd75a8044ef50b7d42c8d", "label" : "How velocity impacts eccentric force generation of fully activated skinned skeletal muscle fibers in long stretches", "user" : "inspo5", "description" : "", "date" : "2022-07-19 11:10:29", "changeDate" : "2024-07-05 14:40:05", "count" : 6, "pub-type": "article", "journal": "Journal of Applied Physiology", "year": "2022", "url": "/brokenurl# https://doi.org/10.1152/japplphysiol.00735.2021 ", "author": [ "Sven Weidner","Andre Tomalka","Christian Rode","Tobias Siebert" ], "authors": [ {"first" : "Sven", "last" : "Weidner"}, {"first" : "Andre", "last" : "Tomalka"}, {"first" : "Christian", "last" : "Rode"}, {"first" : "Tobias", "last" : "Siebert"} ], "editor": [ "Tobias Siebert" ], "editors": [ {"first" : "Tobias", "last" : "Siebert"} ], "volume": "133","number": "1","pages": "223-233","note": "PMID: 35652830","abstract": "Ecccentric muscle contractions are fundamental to everyday life. They occur markedly in jumping, running, and accidents. Following an initial force rise, stretching of a fully activated muscle can result in a phase of decreasing force (\u201CGive\u201D) followed by force redevelopment. However, how the stretch velocity affects \u201CGive\u201D and force redevelopment remains largely unknown. We investigated the force produced by fully activated single-skinned fibers of rat extensor digitorum longus muscles during long stretches. Fibers were pulled from length 0.85 to 1.3 optimal fiber length at a rate of 1\\%, 10\\%, and 100\\% of the estimated maximum shortening velocity. \u201CGive\u201D was absent in slow stretches. Medium and fast stretches yielded a clear \u201CGive.\u201D After the initial force peak, forces decreased by 11.2\\% and 27.8\\% relative to the initial peak force before rising again. During the last half of the stretch (from 1.07 to 1.3 optimal fiber length, which is within the range of the expected descending limb of the force-length relationship), the linear force slope tripled from slow to medium stretch and increased further by 60\\% from medium to fast stretch. These results are compatible with forcible cross-bridge detachment and redevelopment of a cross-bridge distribution, and a viscoelastic titin contribution to fiber force. Accounting for these results can improve muscle models and predictions of multibody simulations.NEW & NOTEWORTHY Eccentric muscle contractions are part of our daily lives. We found that force increased monotonically during slow stretches of fully activated muscle fibers, whereas higher stretch velocities resulted in an increasing drop in force after an initial increase and a final steeper rise in force. Cross-bridges cannot explain the observed force traces. This requires a viscoelastic non-cross-bridge contribution. Considering these results can improve muscle models and predictions of multibody simulations.", "eprint" : "https://doi.org/10.1152/japplphysiol.00735.2021", "doi" : "10.1152/japplphysiol.00735.2021", "bibtexKey": "doi:10.1152/japplphysiol.00735.2021" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/24295397405bd6b64c87b1b56bab3529b/inspo5", "tags" : [ "ergometer","SSC","potentiation","muscle","motion","capture","concentric","force","enhancement","eccentric" ], "intraHash" : "4295397405bd6b64c87b1b56bab3529b", "interHash" : "0535f924fe995f82ece9301a4bd96aa8", "label" : "10 % Higher Rowing Power Outputs After Flexion-Extension-Cycle Compared to an Isolated Concentric Contraction in Sub-Elite Rowers", "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": "2020", "url": "https://doi.org/10.3389%2Ffphys.2020.00521", "author": [ "Steffen Held","Tobias Siebert","Lars Donath" ], "authors": [ {"first" : "Steffen", "last" : "Held"}, {"first" : "Tobias", "last" : "Siebert"}, {"first" : "Lars", "last" : "Donath"} ], "editor": [ "Tobias Siebert" ], "editors": [ {"first" : "Tobias", "last" : "Siebert"} ], "volume": "11","abstract": "The resulting muscular performance is considered notably higher during a stretch shortening cycle (SSC) compared to an isolated concentric contraction. Thus, the present study examined the occurrence and magnitude of rowing performance enhancement after a flexion\u2013extension cycle (FEC) of the legs compared to both concentric contractions only and isometric pre-contraction. Therefore, 31 sub-elite male rowers (age: 25 ± 6 years, height: 1.90 ± 0.02 m, weight: 91 ± 10 kg, weekly training volume: 11.4 ± 5.3 h/week, rowing experience: 7.1 ± 2.7 years) randomly completed (a) isolated concentric rowing strokes (DRIVE), (b) single FEC-type rowing strokes (SLIDE-DRIVE), and (c) rowing strokes with an isometric pre-contraction (ISO-DRIVE). The resulting rowing power (Prow), leg power (Pleg), and work per stroke (WPS) were recorded using motion-capturing, force, and rotation sensors. Comparison of DRIVE and SLIDE-DRIVE revealed significantly (p < 0.05) higher Prow (+11.8 ± 14.0%), Pleg (+19.6 ± 26.7%), and WPS (+9.9 ± 10.5%) during SLIDE-DRIVE. Compared to ISO-DRIVE, Pleg (+9.8 ± 26.6%) and WPS (+6.1 ± 6.7%) are again significantly (p < 0.05) higher for SLIDE-DRIVE. In conclusion, notably higher work and power outputs (compared to an isolated concentric contraction) during FEC rowing referred to an underlying SSC. Future ultrasound studies should elucidate whether a real SSC on the muscle tendon unit level account for these performance enhancements.", "doi" : "10.3389/fphys.2020.00521", "bibtexKey": "Held_2020" } , { "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" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2691e2845166a4110b43d947ceaa1c0ac/inspo5", "tags" : [ "Skill","Limb","muscle","Eccentric","contraction","biomechanics","Dog","Jumping","stiffness" ], "intraHash" : "691e2845166a4110b43d947ceaa1c0ac", "interHash" : "b03343a1fd3237294b7eb8d42fe378f1", "label" : "Limb dynamics in agility jumps of beginner and advanced dogs", "user" : "inspo5", "description" : "", "date" : "2022-07-19 11:10:29", "changeDate" : "2022-07-19 09:10:56", "count" : 2, "pub-type": "article", "journal": "Journal of Experimental Biology","publisher":"The Company of Biologists", "year": "2020", "url": "https://doi.org/10.1242%2Fjeb.202119", "author": [ "Katja Söhnel","Christian Rode","Marc H. E. de Lussanet","Heiko Wagner","Martin S. Fischer","Emanuel Andrada" ], "authors": [ {"first" : "Katja", "last" : "Söhnel"}, {"first" : "Christian", "last" : "Rode"}, {"first" : "Marc H. E.", "last" : "de Lussanet"}, {"first" : "Heiko", "last" : "Wagner"}, {"first" : "Martin S.", "last" : "Fischer"}, {"first" : "Emanuel", "last" : "Andrada"} ], "editor": [ "Tobias Siebert" ], "editors": [ {"first" : "Tobias", "last" : "Siebert"} ], "doi" : "10.1242/jeb.202119", "bibtexKey": "S_hnel_2020" } ] }