Title UTJECAJ FREKVENCIJE KORAKA NA ENERGETSKU POTROŠNJU U BRZOM KLIZANJU NA KRATKE STAZE Title (english) EFFECT OF DIFFERENT CROSSOVER FREQUENCIES ON ENERGY EXPENDITURE IN SHORT TRACK SPEED SKATINGCROSSOVER FREQUENCIES IN SHORT TRACK SPEED SKATING Author Martin Kolenc Mentor Vlatko Vučetić (mentor)Committee member Vlatko Vučetić (predsjednik povjerenstva)Committee member Davor Šentija (član povjerenstva)Committee member Ljubomir Antekolović (član povjerenstva)Granter University of Zagreb Defense date and country 2020-09-25, Croatia Scientific / art field, SOCIAL SCIENCES Abstract U brzom klizanju na kratke staze je tijekom cijele utrke važno biti energetski učinkovit. Kako bi klizač to postigao najčešće odabire jednu od tri osnovnih frekvencija koraka kroz zavoj (jedan, dva ili tri koraka kroz zavoj) koja će mu najviše odgovarati. No, ne mora nužno značiti da će upravo ta frekvencija koraka biti i energetski najučinkovitija. Cilj ovoga rada je utvrditi razlike između tri različite frekvencije koraka u pokazateljima razine opterećenja tijekom brzog klizanja na kratke staze, te ukoliko postoji statistički značajna razlika između njih, utvrditi najoptimalniju frekvenciju koraka koja bi pružala optimalnu energetsku potrošnju i koja bi bila energetski najučinkovitija.
Uzorak se sastoji od ispitanika koji su dugogodišnji članovi Hrvatske reprezentacije brzog klizanja na kratke staze te sadržava tri klizača i tri klizačice. Prosječna dob ispitanika iznosi 20,8 ± 2,77 godina. Prosječna visina uzorka ispitanika iznosi 173,4 ± 8,73 cm, dok masa tijela iznosi 64,4 ± 10,81 kg. Ispitanici su izvršili 3x8 krugova na 65% od maksimalne brzine, s odmorima od osam minuta između svakog ponavljanja, izvodeći tri osnovne frekvencija koraka. Korištene su sljedeće varijable: Lakavg, SOOavg, Lakmax, SOOmax i VEmax kao pokazatelji razine opterećenja.
Rezultati pokazuju kako ne postoji statistički značajna razlika između tri osnovne frekvencije koraka pri brzini od 65% od maksimalne brzine. Čini se kako postoje specifičnosti svake frekvencije koraka i njenog utjecaja na organizam klizača, ali zaključivanje o tome na temelju prikazanih rezultata nije opravdano. Potrebna su daljnja istraživanja koja bi uključivala nekoliko brzina klizanja i veći uzorak. Zaključno, frekvencija koraka koju klizač odabire je ovisna o njegovim individualnim karakteristikama i stilu klizanja.
Abstract (english) In short track speed skating it is important to stay energy efficient throughout whole race or competition. To achieve that, skater chooses one out of three (or combination) crossover frequency which will suit him the most. But that does not mean that that particular crossover frequency will be the most energy efficient one. The aim of this study is to determine the differences between three main crossover frequencies and, if there is a statistically significant difference between them, determine the most energy efficient one.
Research sample is composed out of skaters who are members of Croatian national team, which includes three female and three male skaters. Mean age of sample is 20,8 ± 2,77 years. Mean body height of sample is 173,4 ± 8,73 cm, while mean body mass is 64,4 ± 10,81 kg. Skaters executed 3x8 laps on 65% of maximal speed, with an 8 minute rest between them, with different crossover frequency each repetition. Measured variables, i.e. load indicators, are: Lactavg, RPEavg, Lactmax, RPEmax and VEmax.
Results show that there is no statistically significant difference between three main crossover frequencies while skating at 65% of maximal speed. It seems as though there are unique ways in which every frequency stresses the body, but making strict conclusions based on presented data is not justified. Further research is needed which would include more examinees and different skating speeds. To conclude, chosen crossover frequency depends on skaters characteristics and individual skating style.
Keywords
energetska učinkovitost
ANOVA ponovljena mjerenja
živčano-mišićni sustav
anaerobni sustav energije
Keywords (english)
energy efficient
ANOVA repeated measures
neuromuscular system
anaerobic energy system
Language croatian URN:NBN urn:nbn:hr:117:274232 Study programme Title: Kinesiology; specializations in: Kinesiology in Education and Track-and-Field, Kinesiology in Education and Fitness, Kinesiology in Education and Wrestling, Kinesiology in Education and Sailing, Kinesiology in Education and Windsurfing, Kinesiology in Education and Judo, Kinesiology in Education and Kayaking, Kinesiology in Education and Kinesiological Recreation, Kinesiology in Education and Kinesitherapy, Kinesiology in Education and Physical Conditioning of Athletes, Kinesiology in Education and Basketball, Kinesiology in Education and Football, Kinesiology in Education and Volleyball, Kinesiology in Education and Basic Kinesiological Transformations, Kinesiology in Education and Dancing, Kinesiology in Education and Swimming, Kinesiology in Education and Rhythmic Gymnastics, Kinesiology in Education and Handball, Kinesiology in Education and Skiing, Kinesiology in Education and Artistic Gymnastics, Kinesiology in Education and Management of Sport, Kinesiology in Education and Tennis, Kinesiology in Education and Rowing Type of resource Text File origin Born digital Access conditions Open access Terms of use Created on 2020-12-11 11:39:55
