AKUTNI UČINCI SUPLEMENTACIJE NATRIJEVIM HIDROGENKARBONATOM NA IZVEDBU VJEŽBE POTISAK S RAVNE KLUPE

master's thesis

• Title (english): ACUTE EFFECTS OF SODIUM BICARBONATE SUPPLEMENTATION ON BENCH PRESS PERFORMANCE
• Author: Dorian Varović
• Mentor: Saša Vuk (mentor)
• Committee member: Saša Vuk (predsjednik povjerenstva)
• Committee member: Pavle Mikulić (član povjerenstva)
• Committee member: Maroje Sorić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Kinesiology; Zagreb
• Defense date and country: 2022-09-08, Croatia
• Scientific / art field, discipline and subdiscipline: SOCIAL SCIENCES; Kinesiology

Abstract

Cilj ovog istraživanja bio je utvrditi akutne učinke suplementacije natrijevim hidrogenkarbonatom na mišićnu izdržljivost, izlaznu snagu i brzinu pri izvedbi vježbe potisak s ravne klupe. Devetnaest ispitanika s prethodnim iskustvom u treningu s otporom sudjelovalo je u ovom randomiziranom, dvostruko slijepom, placebo kontroliranom istraživanju. Ispitanici su unijeli 0,3 g/kg natrijeva hidrogenkarbonata ili 0,21 g/kg placeba (natrijev klorid) u tri vremenske točke (180, 120, 60 min) prije početka eksperimentalnog protokola. Ispitanici su izvodili vježbu potisak s ravne klupe sa 70 % od jednog maksimalnog ponavljanja do mišićnog otkaza. Analizirani su ukupan broj ponavljanja po serijama, kao i ukupan broj ponavljanja kroz sve tri serije kako bi se utvrdili učinci natrijeva hidrogenkarbonata na kvantitetu izvedbe. Parametri snage i brzine korišteni su kako bi se utvrdili učinci na kvalitetu izvedbe na način da se izjednačio broj ponavljanja između dva uvjeta.
Pronađene su statistički značajne razlike za natrijev hidrogenkarbonat u sljedećim varijablama: a) broj ponavljanja u trećoj seriji (Hedgeov g: 0,30, p = 0,046); b) ukupan broj ponavljanja kroz sve tri serije (g = 0,23; p = 0,04); c) vršna snaga u drugoj seriji (g = 0,19; p = 0,03); d) prosječna brzina (g: 0,30; p = 0,02) i prosječna snaga (g = 0,23; p = 0,03) u trećoj seriji.
Rezultati ovog istraživanja ukazuju na ergogene učinke suplementacije natrijevim hidrogenkarbonatom na mišićnu izdržljivost, izlaznu snagu i brzinu pri izvedbi vježbe potisak s ravne klupe. Navedeni ergogeni učinci vidljivi su tek u drugoj i trećoj seriji što podupire mehanizme djelovanja natrijeva hidrogenkarbonata na način da smanjuju negativne učinke acidoze na mišićnu kontrakciju te omogućuje daljnje obavljanje rada.

Abstract (english)

The aim of this study was to explore acute effects of sodium bicarbonate supplementation on muscular endurance, power, and velocity output in the bench press exercise. Nineteen resistance-trained men participated in this randomized, double-blind, placebo-controlled study.
Participants ingested either 0,3 g/kg of sodium bicarbonate or 0,21 g/kg of placebo (sodium chloride) in three time points (180, 120, 60 minutes) before starting the experimental protocol. Participants performed the bench press exercise with loads corresponding to 70 % of one-repetition maximum performed to muscular failure throughout 3 sets. To assess quantity of performance, the number of repetitions in each set and throughout all three sets were analyzed. In addition, power and velocity of repetitions were explored to assess the quality of performance by matching the number of repetitions between the two conditions.
Statistically significant differences following sodium bicarbonate ingestion were found for the following variables: a) number of repetitions in the third set (g: 0,30, p = 0,046); b) the total number of repetitions throughout all three sets (g = 0,23; p = 0,04); c) peak power in the second set (g = 0,19; p = 0,03); d) peak velocity (g: 0,30; p = 0,02) and peak power (g = 0,23; p = 0,03) in the third set.
Results indicate that sodium bicarbonate supplementation elicits ergogenic effects on muscular endurance, power, and velocity output in the bench press exercise. These effects were observed only in the second and third set. This supports mechanisms of sodium bicarbonate which acts by attenuating negative effects of acidosis on muscle contractility and allows an athlete to perform further work.

• Keywords: ergogeno sredstvo; acido-bazna ravnoteža; mišićna izdržljivost; puferi; izlaz snage
• Keywords (english): ergogenic aid; acid-base balance; muscular endurance; buffering; power output
• Language: croatian
• URN:NBN: urn:nbn:hr:117:815499
• 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; Course: Kinesiology in Education and Kinesitherapy; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar / magistra kineziologije (magistar / magistra kineziologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-10-14 08:05:05