Zanesljivost in veljavnost Camry dinamometra za merjenje moči stiska pesti : magistrsko delo

Uljan, Tjaša (author), Premelč, Jerneja (mentor)

Z magistrskim delom smo želeli ugotoviti zanesljivost in veljavnost Camry dinamometra. Za vzorec smo vzeli študente Fakultete za šport Univerze v Ljubljani in tamkajšnje zaposlene. Vzorec sestavlja 126 oseb, starih od 20 do 43 let. Za primerjavo smo vzeli Jamar dinamometer, ki velja kot zlati standard pri merjenju moči stiska pesti. Opravili smo šest ponovitev merjenj, tri z vsako roko, z obema instrumentoma. Merjenec je sedel na stolu, z nogami na tleh. Roko je imel pokrčeno pod kotom 90 stopinj, komolec je bil ob telesu in dlan v nevtralnem položaju. Z maksimalno močjo je merjenec nato izvedel izometrični stisk pesti z dinamometrom. Vrstni red meritev je bil naključen, da bi zmanjšali vpliv utrujanja, smo med vsako ponovitvijo naredili premor. Oba dinamometra imata možnosti nastavitve ročice – merjencem smo dovolili, da si ročico nastavijo tako, da so čutili najboljši oprijem. Statistično analizo smo naredili v programu SPSS verzije 27, grafe pa smo izrisali s pomočjo programa GraphPad. Za ugotavljanje zanesljivosti smo s 95 % intervalom zaupanja izračunali interklasni korelacijski koeficient (ICC), za ugotavljanje povezanosti med dinamometroma pa Spearmanov korelacijski koeficient. Rezultate smo tudi grafično prikazali z Bland-Altman analizo podatkov. Dobili smo visoke vrednosti interklasnega korelacijskega koeficienta, ki so bile večje od 0,9, kar nakazuje na odlično zanesljivost. Standardna napaka je pri Camry dinamometru znašala 2,36, standardni odklon pa 10,79. Pri Camry dinamometru ni bilo večjih opaznih razlik med levo in desno roko. Zaradi nenormalne porazdelitve podatkov smo za ugotavljanje korelacije uporabili Spearmanov korelacijski koeficient. Tudi ta vrednost je bila visoka, višja od 0,9, kar kaže na močno povezanost Camry in Jamar dinamometra. Pri ugotavljanju povezanosti med dinamometroma smo uporabili tri različne analize podatkov. Izračunali smo povprečje treh meritev posebej za levo in desno roko, maksimalen rezultat za desno in levo roko ter povprečje dveh bližnjih vrednosti, ponovno ločeno za obe roki. Pri vseh analizah smo dobili p- vrednost manjšo od 0,05 ter Spearmanov koeficient korelacije večji od 0,9. Pri vseh treh analizah smo za desno roko dobili nekoliko višje vrednosti v primerjavi z levo roko. Z raziskavo smo potrdili, da je dinamometer Camry dovolj zanesljiv in ga priporočamo za uporabo.

• Language: Slovenian
• Keywords: stisk pesti, dinamometer, moč, telesna dejavnost
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FŠ - Faculty of Sport
• Year: 2025
• PID: 20.500.12556/RUL-173881
• COBISS.SI-ID: 256946691
• Publication date in RUL: 25.09.2025

Secondary language

• Language: English
• Title: Reliability and Validity of Camry Dynamometer for Measuring Grip Strength

Abstract

With the master's thesis, we wanted to determine the reliability and validity of the Camry hand dynamometer. For our sample we took students and employees of the Faculty of Sport, University of Ljubljana. The sample consisted of 126 individuals, aged between 20 and 43 years. For comparison, we used the Jamar dynamometer, which is considered the gold standard in measuring grip strength. We completed six measurements, three with each hand. Participants were sitting in a chair, with both feet on tle floor. The arm was bent at a 90- degree angle, with the elbow close to the body and the hand in a neutral position. Each participant then performed a maximal isometric grip using both of the dynamometers. The order of measurements was randomized, and breaks were taken between repetitions to minimize the effect of fatigue. Both dynamometers have adjusting handles, participants were allowed to adjust the handle themselves in otder to achive the most comfortable grip. Statistical analysis was conducted using SPSS version 27, and graphs were made with GraphPad. To assess reliability, we calculated the interclass correlation coefficient (ICC) with a 95% confidence interval. To assess the correlation between the two dynamometers, we used Spearman's correlation coefficient. The results were also presented graphically using the Bland- Altman anaysis. We obtained high ICC values, all above 0.9 which indicate excellent reliability. The standard error for the Camry dynamometer was 2.36 and the standard deciation was 10.79. There were no major observable differences between the left and right hand when using the Camry dynamometer. Due to the non-normal data distribution we used Spearman's correlation coefficient, which was also high-above 0.9 indicating a strong association. Three diffrent dat analysis approaches were used to assess the correlation: the average of three measurements for each hand, the maximum result for each hand, and the average of two closest values, again seperately for each hand. In all analyses, we obtained a p- values less than 0.005 and a Spearman correlation coefficient greater than 0.9. For all three analyses, the values fort he right hand were slihtly higer than those for the left hand. Our research confirmed that the Camry dynamometer is sufficiently reliable and recommended for use.

• Keywords: grip strength, dynamometer, strength, physical activity