| Abstract | Cilj ovog rada je bio utvrditi valjanost i pouzdanost mobilne aplikacije Metric VBT u vježbi potisak s ravne klupe. Istraživanju je pristupilo petnaest (15) muških ispitanika (dob 24,2 ± 1,6 godina; visina 183,8 ± 7,51 cm; tjelesna masa 87,8 ± 8,5 kg) s iskustvom u treningu s opterećenjem te vježbi potisak s ravne klupe u trajanju od najmanje dvije (2) godine. Od ispitanika se zahtijevalo izvođenje 3 maksimalno brza koncentrična ponavljanja pri opterećenjima od 30%, 45%, 60% i 75% 1 RM-a u potisku s ravne klupe. Brzina pokreta mjerila se istovremeno pomoću Vitruve mjernog uređaja te mobilne aplikacije Metric VBT. Zbog nemogućnosti očitavanja brzine pokreta, opterećenje od 30% 1RM-a je isključeno iz daljnje statističke obrade. Rezultati prikazuju statistički značajnu (p < 0,05) jako visoku te skoro savršenu povezanost ukupnog broja ponavljanja (150) za varijable srednje (r = 0,93; SEM = 0,01 ± 0,06 m/s), vršne brzine (r = 0,91; SEM = -0,08 ± 0,12 m/s) i amplitude pokreta ( r = 0,75; SEM= 4,38 ± 4,14 cm). Također, postoji statistički značajna (p < 0,05) srednja do jako visoka povezanost za pojedinačna opterećenja u varijablama srednje (r = 0,47 [45%]; r = 0,85 [60%]; r = 0,89 [75%]), vršne brzine (r = 0,79 [60%]; r = 0,81 [75%]) i amplitude pokreta (r = 0,71 [45%]; r = 0,79 [60%]; r = 0,77 [75%]). S druge strane, pouzdanost za pojedinačna ponavljanja mjerena intraklasnim koeficijentom korelacije (ICC) ukazuje u postojanje statistički značajne (p < 0,05) odlične ponovljivosti rezultata za varijable srednje (ICC = 0,93 [45%]; ICC = 0,95 [60%]; ICC = 0,95 [75%]), vršne brzine (ICC = 0,89 [45%]; ICC = 0,97 [60%]; ICC = 0,92 [75%]) i amplitude pokreta (ICC = 0,97 [45%]; ICC = 0,95 [60%]; ICC = 0,97 [75%]). Varijacije rezultata unutar jednog ispitanika za pojedinačna opterećenja mjerene pomoću koeficijenta varijacije (CV) govore o prihvatljivoj razini varijabilnosti (<10%) za varijable srednje (CV = 3,91% [45%]; CV = 4,74% [60%]; CV = 7,09% [75%]), vršne brzine (CV = 4,90% [45%]; CV = 5,94% [60%]; CV = 9,41% [75%]) i amplitude pokreta (CV = 3,91% [45%]; CV = 3,12% [60%]; CV = 3,07% [75%]). U konačnici, dobiveni rezultati podržavaju uporabu mobilne aplikacije Metric VBT za praćenje brzine pokreta u vježbi potisak s ravne klupe. |
| Abstract (english) | The aim of this study was to determine the validity and reliability of Metric VBT mobile application during the bench press exercise. The research was attended by fifteen (15) male participants (age 24.2 ± 1.6 years; height 183.8 ± 7.51 cm; weight 87.8 ± 8.5 kg) with experience in strength training and bench press exercise for at least two (2) years. Participants were required to perform 3 maximally fast concentric repetitions at loads of 30%, 45%, 60% and 75% of 1RM in the bench press exercise. Movement velocity was simultaneously recorded using the Vitruve measuring device and the Metric VBT mobile application. Due to the impossibility of reading the movement velocity the load of 30% 1RM was excluded from further statistical analysis. Results show a statistically significant (p < 0.05) very high and almost perfect correlation of the total number of repetitions (150) for the variables of mean (r = 0.93; SEM = 0.01 ± 0.06 m/s), peak velocity (r = 0.91; SEM = -0.08 ± 0.12 m/s) and range of motion ( r = 0.75; SEM= 4.38 ± 4.14 cm). Also, there was a statistically significant (p < 0.05) medium to very high correlation for individual loads in the variables of mean (r = 0.47 [45%]; r = 0.85 [60%]; r = 0.89 [75%]), peak velocity (r = 0.79 [60%]; r = 0.81 [75%]) and range of motion (r = 0.71 [45%]; r = 0.79 [60%]; r = 0.77 [75%]). On the other side, reliability for individual repetitions measured by intraclass correlation coefficient (ICC) indicates in existence of statistically significant (p < 0.05) excellent reproducibility of results for mean (ICC = 0.93 [45%]; ICC = 0.95 [60%]; ICC = 0.95 [75%]), peak velocity (ICC = 0.89 [45%]; ICC = 0.97 [60%]; ICC = 0.92 [75%]) and range of motion (ICC = 0.97 [45%]; ICC = 0.95 [60%]; ICC = 0.97 [75%]). Variation of results within one subject for individual loads measured using the coefficient of variation (CV) indicates an acceptable level of variability (<10%) for mean (CV = 3.91% [45%]; CV = 4.74% [60%]; CV = 7.09% [75%]), peak velocity (CV = 4.90% [45%]; CV = 5.94% [60%]; CV = 9.41% [75%]) and range of motion (CV = 3.91% [45%]; CV = 3.12% [60%]; CV = 3.07% [75%]). Ultimately, the obtained results support the use of the Metric VBT mobile application to track movement velocity in the bench press exercise. |
| 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 Physical Conditioning of Athletes
Study programme type: university
Study level: integrated undergraduate and graduate
Academic / professional title: sveučilišni/sveučilišna magistar/magistra kineziologije u edukaciji (sveučilišni/sveučilišna magistar/magistra kineziologije u edukaciji) |
