Učinki ogljikohidratnega napitka z dodatkom mentola na fiziološke odzive med kolesarjenjem : magistrsko delo

Bolčič, Tina (author), Debevec, Tadej (mentor), Podlogar, Tim (comentor)

Mentol je organska spojina, ki v primeru topične ali peroralne uporabe sproži hladilni občutek in lahko pomembno vpliva na izbrane subjektivne občutke – raven zaznanega napora, raven zaznanega toplotnega udobja in raven zaznane temperature ter posledično športno zmogljivost, zlasti v vročem in vlažnem okolju. Večina dosedanjih raziskav kaže v smer, da v nasprotju s topično uporabo mentola, peroralna uporaba mentola rezultira v (naj)večjem pozitivnem učinku na športno zmogljivost. Na podlagi navedenega je bil glavni namen pričujočega magistrskega dela ugotoviti učinke zaužitja ogljikohidratnega napitka z dodatkom mentola na zmogljivost kolesarjenja med kolesarjenjem na kolesarskem trenažerju, subjektivne občutke, srčno-dihalne in termo-regulacijske odzive. V okviru pričujočega magistrskega dela je 12 odraslih rekreativnih, zdravih kolesarjev moškega spola (starost 28,8 ± 4,5 let; telesna višina 180,8 ± 6,0 cm; telesna masa 78,6 ± 10,2 kg in največji privzem kisika 57,2 ± 6,3 ml/kg/min) trikrat obiskalo laboratorij. Prvič so opravili osnovno vadbeno testiranje za določitev vadbenih obremenitev, ventilatornih pragov (VT) in točke respiratorne kompenzacije (RCP). Med drugim in tretjim obiskom pa so opravili dve eksperimentalni testiranji, ki sta bili sestavljeni iz enournega kolesarjenja pri intenzivnosti 90 % VT1, kateremu je takoj sledilo kolesarjenje do izčrpanosti pri intenzivnosti 105 % RCP. Tekom enournega kolesarjenja pri intenzivnosti 90 % VT1 so randomizirano in dvojno zaslepljeno enkrat uživali ogljikohidratni napitek z dodatkom mentola, enkrat pa ogljikohidratni napitek brez dodatka mentola (placebo). Analiza pridobljenih podatkov je pokazala, da uživanje ogljikohidratnega napitka z dodatkom mentola v primerjavi z uživanjem placeba ni podaljšalo časa do utrujenosti ter ni vplivalo na spremljane subjektivne občutke, srčno-dihalne in termo-regulacijske odzive telesa na napor. Edina statistično značilna razlika (p < 0,05) med obema pogojema se je pojavila v okviru vprašalnika o napitkih, in sicer preiskovanci so se po zaužitju ogljikohidratnega napitka z dodatkom mentola počutili hladneje kot po zaužitju placeba. Rezultati pričujočega magistrskega dela kažejo na to, da uživanje ogljikohidratnega napitka z dodatkom mentola nima pomembnega vpliva na raven zaznanega napora, raven zaznanega toplotnega udobja in raven zaznane temperature ter ne podaljša časa do utrujenosti oziroma izboljša športne zmogljivosti odraslih rekreativnih, zdravih kolesarjev moškega spola.

• Language: Slovenian
• Keywords: mentol, ergogeno sredstvo, kolesarjenje, športna zmogljivost
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FŠ - Faculty of Sport
• Year: 2022
• PID: 20.500.12556/RUL-139105
• COBISS.SI-ID: 120587011
• Publication date in RUL: 31.08.2022

Secondary language

• Language: English
• Title: Effects of a carbohydrate drink with the addition of menthol on physiological responses during cycling

Abstract

Menthol is an organic compound that, in the case of topical or oral use, elicit a cooling sensation that appears to have a significant effect on selected subjective sensations – rate of perceived exertion, thermal comfort and thermal sensation, and consequently athletic performance, especially in a humid and hot environment. Majority of up-to-date research suggest, that, unlike the topical use of menthol, oral use of menthol results in greatest beneficial effect on athletic performance. Accordingly, the main purpose of present master thesis was to assess the effects of the consumption of a carbohydrate drink with the addition of menthol while cycling on cycling trainer on cycling performance, subjective sensations, cardio-respiratory and thermo-regulatory responses. In the present study, 12 adult recreational, healthy male cyclists (age 28,8 ± 4,5 years; height 180,8 ± 6,0 cm; weight 78,6 ± 10,2 kg and maximum oxygen uptake 57.2 ± 6.3 ml/kg/min) underwent three experimental sessions. At the first visit, they performed basic exercise testing to determine exercise loads, ventilatory thresholds (VT) and respiratory compensation point (RCP). Between the second and the third visit, they performed two experimental tests, which consisted of one hour of cycling at 90% VT1, immediately followed by cycling to exhaustion at 105% RCP. During one hour of cycling at 90% VT1 they randomized and double-blinded once consumed a carbohydrate drink with the addition of menthol, and once a carbohydrate drink without the addition of menthol (placebo). The obtained data showed that the consumption of a carbohydrate drink with the addition of menthol, compared with consumption of placebo did not extend the time to volitional exhaustion, and did not affect the monitored subjective sensations, cardio-respiratory and thermo-regulatory responses of the body to exertion. The only statistically significant difference (p < 0,05) between the conditions occurred in the beverage questionnaire, namely that subjects felt colder after consuming a carbohydrate drink with the addition of menthol than after consuming placebo. The present study suggests that the consumption of a carbohydrate drink with the addition of menthol does not affect the rate of perceived exertion, thermal comfort and thermal sensation, as well as does not extend the time to volitional exhaustion or improve athletic performance of adult recreational, healthy male cyclist.

• Keywords: menthol, ergogenic aid, cycling, athletic performance