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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Off-ice tester för att utvärdera snabbhet on-ice : En korrelationsstudie av olika upprepade sprinttester

Alfredsson, Tim, Selin, Anders January 2017 (has links)
Syfte Syftet med studien är att undersöka korrelationen mellan cykeltestet "repeated 5 second cycling sprint test" (R5sCST) samt off-ice testet 36 meter upprepade sprinter (OfI) mot on-ice testet 33 meter upprepade sprinter (OnI). Samtidigt vill vi se om R5sCST kan utvärdera skridskosnabbhet samt undersöka om OfI kan användas som en alternativ testmetod med samma syfte. De frågeställningar vi besvarar är, – Finns det en korrelation mellan R5sCST och OnI? - Finns det en korrelation mellan OfI och OnI? – Är R5sCST och OfI relevanta testmetoder för att utvärdera förmågan till upprepade sprinter on-ice? - Finns det andra testvärden som kan förutse snabbhet on-ice? Metod 3 tester har genomförts, ett cykeltest (R5sCST), ett on-ice test (OnI) och ett off-ice test (OfI). Testerna genomfördes på Bosön och i Björkängshallen vid två olika tillfällen, det var 2 dagar mellan testtillfällena. Testtillfälle 1 genomfördes R5sCST och OfI på Bosön, testtillfälle 2 genomfördes OnI i Björkängshallen. 18 stycken ishockeyspelare på junior elitnivå testades. Försökspersonerna (FP) var mellan 16 och 18 år gamla och har en idrottslig bakgrund inom ishockey som motsvarar 11-13 år. Resultat Studien visar att såväl medelvärdena samt de högst uppmätta effekt värdena hos varje FP från R5sCST testet korrelerar med medel- och högsta värden på OnI. Studien visar även en starkare korrelation mellan OfI och OnI. Slutsats Efter genomförd studie kan det konstateras att R5sCST, trots att det inte efterliknar ishockeyns krav fullt ut i arbetstid/vilotid, är ett reliabelt test för att utvärdera snabbhet on-ice. Det framkommer även i studien att OfI har större korrelationer till OnI än vad R5sCST har, vilket innebär att även OfI är ett högst reliabelt test för att utvärdera snabbhet on-ice. Förutom större korrelationer så är även OfI mer lämpat för lag och föreningar att använda sig av då det är enklare att utföra och mindre kostsamt än R5sCST. / <p>Ämneslärarprogrammet, Specialidrott</p>
2

Strength, Endocrine, and Body Composition Alterations Across Four Blocks of Training in an Elite 400 M Sprinter

Batra, Amit, Wetmore, Alex B., Hornsby, W. G., Lipinska, Patrycja, Staniak, Zbigniew, Surala, Olga, Stone, Michael H. 01 March 2021 (has links)
The ability to produce force rapidly has the potential to directly influence sprinting performance through changes in stride length and stride frequency. This ability is commonly referred to as the rate of force development (RFD). For this reason, many elite sprinters follow a combined program consisting of resistance training and sprint training. The purpose of this study was to investigate the strength, endocrine and body composition adaptations that occur during distinct phases of a block periodized training cycle in a 400 m Olympic level sprinter. The athlete is an elite level 400 m male sprinter (age 31 years, body mass: 74 kg, years of training: 15 and Personal Best (PB): 45.65 s). This athlete completed four distinct training phases of a block periodized training program (16 weeks) with five testing sessions consisting of testosterone:cortisol (T/C) profiles, body composition, vertical jump, and maximum strength testing. Large fluctuations in T/C were found following high volume training and the taper. Minor changes in body mass were observed with an abrupt decrease following the taper which coincided with a small increase in fat mass percentage. Jump height (5.7%), concentric impulse (9.4%), eccentric impulse (3.4%) and power ratio (18.7%) all increased substantially from T1 to T5. Relative strength increased 6.04% from T1 to T5. Lastly, our results demonstrate the effectiveness of a competitive taper in increasing physiological markers for performance as well as dynamic performance variables. Block periodization training was effective in raising the physical capabilities of an Olympic level 400 m runner which have been shown to directly transfer to sprinting performance.
3

Muscle contributions to body mass center acceleration during the first stance of sprint running

MARTÍN DE AZCÁRATE, LAURA January 2019 (has links)
The best results in a sprint running are based upon covering the distance in the shortest possible time, and therefore performance has to be maximized. To achieve the best performance, the sprinter has to develop the greatest forward acceleration, reach his/her maximal speed, and keep it over the run. The greatest anteroposterior acceleration is generated in the first stance of a sprint due to the greatest propulsive force production. Thus, the first step was selected to study induced accelerations by the main muscles of the lower limb. Since a wider step width was founded out to help with force generation during long foot-ground contacts, an elite sprinter with a wide step width was selected. Ankle plantarflexors were the main contributors to body propulsion and support, while knee extensors decelerated forward propulsion but induced medial accelerations. Hip extensors and hip adductors did not offer a remarkable contribution to body COM acceleration in any direction.
4

Stavební jámy kruhového průřezu / Foundation Pits of Circular Cross-section

Plevová, Lenka January 2014 (has links)
The master´s thesis focuses on design of underground sprinkler tank for a shopping centre Sconto in Hradec Králové. The purpose of this thesis is to design and to analyse all parts of this construction. These parts are the roof, the bottom plate and the wall, which is represented by secant piles. Due to the high level of the ground water which causes a great pressure on the bottom of the tank, the solution of the bottom plate represents very important part of this thesis. There were used two programs for an analysis, Scia Engineer 2013 and FIN EC – Beton 3D. Furthermore, the work contains a view and a brief description of methods used for sheeting of foundation pits of a circular cross-section. In the end, this thesis contains the design of two other solutions of bottom plate and its economic comparison.

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