470 KB0 KB200520252021Košnjek, TeaŠtirn, Igorštevilka:3/4letnik:69str. 191-195ISSN:0353-7455COBISSID:90671363URN:URN:NBN:SI:doc-G6QVYCV0slFakulteta za športŠport (Ljubljana)informacijsko komunikacijska tehnologijainformation communication technologymočplavanjepowersodobna tehnologijasportstrengthswimmingšporttechnologyUporaba aplikacije MyJump za merjenje odnosa sila-hitrost pri plavalcih|The force-velocity profile describes the relationship between the rate of muscle shortening and the force it can develop at that rate. Based on the parameters of the individual’s current and optimal F-v profile, we can determine the strength or velocity deficit and adjust the strength training accordingly. The aim of the study was to use the MyJump application to measure the F-v profile in swimmers and determine whether the parameters obtained were related to tests that define leg work in swimming: swimming 25 m crawl and 5 m push-off from the pool wall after the turn. The force-velocity relationship was measured in ten swimmers by performing squat jumps with additional loads (TT, TT + 20%, TT + 40% and TT + 60%). We used the MyJump2 app for a smartphone (or tablet) to measure the jump height, and a GoPro Hero camera and Coach’s Eye app to measure the swim test times using underwater footage. Using the prepared Excel spreadsheet, we created an F-v profile for vertical jumps (90°) and for jumps at an angle of 30° and calculated the maximum theoretical force (F0), maximum theoretical velocity (v0), maximum mechanical power (Pmax), and curve slope coefficient or profile (SFv). We found no statistically significant relationships between the parameters of the measured profiles and the tests in water. The biggest problem was the small and heterogeneous sample of subjects, as we could not find enough swimmers to correctly and safely perform jumps with additional loads. The use of ICT technology proved to be straightforward. Whether F-v profiling is valid and reliable, and thus useful for targeting strength training, is still under debate in sports scienceProfil sila-hitrost (F-v) opisuje odnos med hitrostjo krajšanja mišice in silo, ki jo pri tej hitrosti lahko razvije. Na podlagi kazalnikov individualnega trenutnega in optimalnega profila lahko ugotovimo primanjkljaj moči ali hitrosti in ustrezno prilagodimo vadbo. Namen raziskave je bil z uporabo aplikacije MyJump izmeriti profil F-v pri plavalcih in ugotoviti, ali so pridobljeni kazalniki povezani s testi, ki opredeljujejo učinkovitost nog pri plavanju: plavanje 25 m udarci kravl in odriv 5 m od stene bazena po obratu. Odnos sila-hitrost smo pri desetih plavalcih merili z izvajanjem skokov iz polčepa z dodatnimi bremeni (TT, TT + 20 %, TT + 40 % in TT + 60 %). Za merjenje skokov smo uporabili aplikacijo MyJump2 za pametni telefon (ali tablico), za merjenje časov plavalnih testov na podlagi podvodnih posnetkov pa kamero GoPro Hero in aplikacijo Coach‘s eye. Z uporabo pripravljene namenske Excelove tabele smo izdelali profil F-v za navpične skoke (90°) in za skoke pod kotom 30° ter izračunali največjo teoretično silo (F0), največjo teoretično hitrost (v0), največjo mehansko moč (Pmax) in koeficient naklona krivulje oziroma profil (SFv). Statistično značilnih povezav med kazalniki izmerjenega profila in testi v vodi nismo ugotovili. Največja težava je bil majhen in heterogen vzorec merjencev, saj nismo mogli najti dovolj plavalcev, ki bi pravilno in varno izvedli skoke z dodatnimi bremeni. Uporaba informacijsko-komunikacijske tehnologije (IKT) se je izkazala za enostavno, o tem ali je profiliranje F-v veljavno in zanesljivo in s tem uporabno za usmerjanje vadbe moči, pa v športni znanosti še vedno razpravljajoTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za šport