Vpliv toplotne obleke na termalne in fiziološke odzive med kolesarjenjem : magistrsko delo

Godina, Blaž (avtor), Debevec, Tadej (mentor), Verdel, Nina (komentor)

Cilj magistrskega dela je bil preučiti vpliv nošenja toplotne obleke na termalne in fiziološke odzive med enournim kolesarjenjem pri zmerni intenzivnosti. Vadba v vročem okolju pomembno vpliva na delovanje termoregulacijskih mehanizmov in poveča obremenitev srčno-žilnega sistema. Zaradi cenovne dostopnosti in enostavne uporabe se toplotne obleke vse pogosteje uporabljajo kot alternativo okoljskim komoram, čeprav pa še ni v celoti jasno, ali toplotna obleka med zmerno intenzivnim kolesarjenjem lahko izzove primerljive odzive. V uvodnem delu so predstavljeni osnovni mehanizmi termoregulacije in odzivi na vadbo v vročini, empirični del pa obravnava akutne termalne in fiziološke odzive med kolesarjenjem z obleko in brez nje. V raziskavo je bilo prostovoljno vključenih 21 zdravih odraslih (17 moških in 4 ženske), ki so najprej opravili stopnjevalni obremenitveni test na cikloergometru. Na podlagi testa so bile individualno določene obremenitve (45 % maksimalne mehanske moči) za obe 60-minutni testiranji. Randomizirano je bilo eno testiranje opravljeno z obleko, eno pa brez nje, in sicer v razmiku enega tedna, z namenom, da se zmanjša vpliv zunanjih dejavnikov in menstrualnega cikla. Rezultati kažejo, da je bila temperatura jedra z obleko višja ob 60. minuti (+0,25 °C; p = 0,0025) in med počitkom po vadbi (+0,36 °C; p = 0,0057), medtem ko razlike v zgodnejših fazah vadbe niso bile statistično značilne. Temperatura kože je bila statistično višja v vseh časovnih točkah z obleko (najvišja razlika +2,71 °C; p < 0,001). Frekvenca srčnega utripa je bila z obleko višja v vseh časovnih točkah, največja ob 60. minuti (+16,4 ud/min.; p < 0,001). Ventilacija je bila statistično višja z obleko le pri 30. (+4,0 l/min.; p = 0,0029) in 60. minuti (p = 0,0083). Med pogojema ni bilo statistično značilnih razlik v VO₂, MET in telesni teži. Koncentracija laktata je bila višja z obleko, tako pred kot po vadbi (+0,18 in +0,14 mmol/L; p = 0,0463), vendar interakcija med časom in pogojem ni bila statistično značilna. V skladu z dosedanjimi ugotovitvami ta raziskava potrjuje, da nošnja toplotne obleke povzroči postopno (dodatno) povečevanje toplotne obremenitve, ki se izrazi predvsem v drugi polovici 60-minutne vadbe z višjo jedrno temperaturo, višjo povprečno temperaturo kože in višjo frekvenco srčnega utripa. Magistrsko delo omogoča boljše razumevanje akutnih učinkov toplotne obleke in njene uporabe za namene vročinske aklimatizacije.

• Jezik: Slovenski jezik
• Ključne besede: termoregulacija, vročina, vadba, športna sposobnost, toplotna obleka
• Vrsta gradiva: Magistrsko delo/naloga
• Tipologija: 2.09 - Magistrsko delo
• Organizacija: FŠ - Fakulteta za šport
• Leto izida: 2025
• PID: 20.500.12556/RUL-173990
• COBISS.SI-ID: 256955907
• Datum objave v RUL: 26.09.2025

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Effect of Heat Suit on Thermal and Physiological Responses During Cycling

Izvleček

The present thesis aimed to examine the effect of wearing a thermal (personal protective) suit on thermal and physiological responses during one-hour cycling at moderate intensity. Exercising in the heat significantly changes the modulation of thermoregulatory mechanisms and increases the load on the cardiovascular system. Due to their affordability and ease of use, thermal suits are becoming a popular alternative to environmental chambers, but it remains unclear whether the suit can elicit comparable responses during moderate intensity cycling. The introductory part presents the basic mechanisms of thermoregulation and responses to exercise in the heat. In contrast, the empirical part deals with acute thermal and physiological responses during cycling with and without the suit. 21 healthy adults (17 men and 4 women) voluntarily participated in the study and first performed a progressive exercise test on a cycle ergometer. Based on this test and individually tailored intensity was determined (45% of maximum mechanical power) for the subsequent two 60-minute cycling experimental trials. The participants performed one training session with the suit and one without in a randomized fashion within one week to minimize the influence of external factors and the menstrual cycle. The results show that core temperature was higher with the suit at 60 minutes (+0.25°C; p = 0.0025) and during rest after exercise (+0.36°C; p = 0.0057), while the differences in earlier phases were not statistically significant. Skin temperature was higher at all time points with the suit (maximum difference +2.71°C; p < 0.001). Heart rate was higher with the suit at all time points, with the maximum at 60 minutes (+16.4 beats/min.; p < 0.001). Ventilation was higher with the suit only at the 30th (+4.0l/min.; p = 0.0029) and 60th minute (p = 0.0083). There were no significant differences in VO₂, MET, and body weight between conditions. Lactate concentration was higher with the suit both before and after exercise (+0.18 and +0.14mmol/L; p = 0.0463), without and interaction effect. Our present work confirms previous findings suggesting that wearing a thermal suit causes a gradual additive heat accumulation, which is predominantly evident in the second half of the 60-min exercise and reflected in higher core body temperature, average skin temperature and higher heart rate. The obtained data enable better understanding of the acute effects of thermal suit and its use for heat acclimatization purposes.

• Ključne besede: thermoregulation, heat, exercise, athletic performance, heat suit