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Fizička kultura
2000, vol. 54, br. 1-4, str. 46-55
jezik rada: srpski
vrsta rada: neklasifikovan
objavljeno: 02/06/2007
Uticaj inercionog opterećenja na adaptacione procese pri trčanju različitim brzinama
Univerzitet u Beogradu, Fakultet sporta i fizičkog vaspitanja

Sažetak

Cilj rada je da ukaže na dosadašnja eksperimentalna iskustva o adaptacionim procesima pri primeni inercionih opterećenja u zavisnosti od veličine i mesta njegovog fiksiranja, pri trčanju različitim brzinama. U radu su prezentirani efekti primene inercionog opterećenja na nekim kinematičkim i dinamičkim performansama trčanja (frekvencija i dužina koraka, maksimalna brzina trčanja, trajanje faze zamaha, faze leta, faze kontakta, ugao natkolenice odrazne noge u momentu odraza, ugao maksimalne fleksije potkolenice i sl) Dalje su izneseni dokazi funkcionalnih (fizioloških) promena tj. metaboličkih prilagođavanja (frekvencija srca, maxVO2 produkcija laktata, potrošnje energije i sl) u toku trčanja sa dodatnim opterećenjem. Potom su prikazani efekti povećanog mehaničkog i fiziološkog naprezanja (regrutacija brzih mišićnih vlakana) na morfološki status (mišići i pojedinačna mišićna vlakna), eksperimentalnim praćenjem EMS aktivnosti tokom trčanja na tredmilu sa dodatnim opterećenjem. Povećanje mišićnog rada koje prouzrokuje inerciono opterećenje, manifestuje se i na motorički status, pre svega kroz adekvatno ispoljavanje sile i snage u trčanju različitim brzinama. Pri tome sila i snaga pokazuju različit stepen korelacije sa brzinom trčanja, na što je sistematski ukazano u ovom radu.

Ključne reči

inerciono opterećenje; kinematičke i dinamičke performanse; funkcionalne promene; motorički status; morfološki status

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