Utjecaj unosa kofeina, raspoložive energije i stupnja hidracije na kognitivne funkcije i percepciju umora kod vrhunskih demonstratora skijanja

master's thesis

• Title (english): Impact of caffeine intake, energy availability and hidration status on cognitive functions and perception of fatigue on top level ski demonstrators
• Author: Helena Gaube
• Mentor: Zvonimir Šatalić (mentor)
• Committee member: Marina Krpan (predsjednik povjerenstva)
• Committee member: Ines Panjkota-Krbavčić (član povjerenstva)
• Committee member: Ksenija Marković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; (Department of Food Quality Control); (Laboratory for Nutrition Science); Zagreb
• Defense date and country: 2023-12-05, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Nutrition

Abstract

S obzirom da ne postoje istraživanja o utjecaju raspoložive energije, kofeina i hidracije na umor i kognitivne funkcije u ekstremnim uvjetima okoliša, cilj je istraživanja ispitati te učinke. Uključeno je 12 demonstratora i 3 demonstratorice skijanja, dobi 21-55 godina. Razina raspoložive energije (kcal/kg nemasne tjelesne mase) izračunata je na temelju podataka o energetskom unosu (procijenjenom sedmodnevnim dnevnikom prehrane), energetskoj potrošnji (procijenjenoj sedmodnevnim dnevnikom tjelesne aktivnosti), primjeni kompendija potrošnje energije različitih tjelesnih aktivnosti i nemasnoj tjelesnoj masi (dobivenoj antropometrijskim mjerenjima). Stupanj hidracije procijenjen je specifičnom težinom i bojom urina prema Armstrongovoj skali. Izvor kofeina je PowerBar Caffeine Boost ampula (200 mg za skijašice, 400 mg za skijaše) s ciljanim unosom 3-6 mg/kg. Umor je procijenjen vizualno-analognom skalom (VAS-F), a kognitivne funkcije vizualnim testom vremena reakcije (RT). Suplementacija kofeina i adekvatan stupanj hidracije pospješuju kognitivne funkcije i smanjuju percepciju umora, dok razina raspoložive energije ne utječe na kognitivne funkcije i umor.

Abstract (english)

In the absence of studies on the impact of available energy, caffeine and hydration on fatigue and cognitive functions in extreme conditions, this research aims to explore these effects. It involved 12 male and 3 female skiing demonstrators aged 21 to 55. Energy availability (kcal/kg of lean body mass) was calculated using data from energy intake and exercise energy expenditure, compendium of physical activities and fat-free mass. Hydration status was estimated through specific gravity and urine color on the Armstrong scale. Caffeine, sourced from PowerBar Caffeine Boost ampules (200 mg for females, 400 mg for males), targeted an intake of 3-6 mg/kg. Fatigue was assessed using a visual analog scale (VAS-F) and cognitive functions were assessed using a visual reaction time test (RT). Caffeine supplementation and adequate hydration enhance cognitive functions and reduce fatigue perception, while available energy levels have no impact on cognitive functions and fatigue.

• Keywords: kofein; hidracija; raspoloživa energija; kognitivne funkcije; umor
• Keywords (english): caffeine; hydration; energy availability; cognitive functions; fatigue
• Language: croatian
• URN:NBN: urn:nbn:hr:159:694059
• Study programme: Title: Nutrition; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra nutricionizma (magistar/magistra nutricionizma)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Repository: Repository of the Faculty of Food Technology and Biotechnology
• Created on: 2024-05-29 08:10:41