Reliability of measuring various contractile functions of finger flexors of men of various ages

Abstract

ABSTRACTe aim of the research is to determine the reliability of testing various contractile functions of a male hand based on motoric and functional dominance and age. e examinee takes a seat with their arm extended or mildly exed in a mildly abducted position. For the measuring purposes, dynamometric probe with isometric straining conditions xed to a special construction was used. e "Isometrics" (ver. 3.1.1) was used and frequency of data selection was realized on the level of 500 Hz. e sample includes 269 male examinees aged from 14.0 to 69.9. e results of descriptive statistics have shown that in relation to the tested sample for the non-dominant hand, values for maximum force (F max ) range from 462.8 to 529.0 N, for explosive force (RFD max ) the range is from 1621.6 to 1972.8 N/s and for muscular force impulse (I mp F 50%max ) from 8203.9 to 15552.3 Ns, while F max values the dominant hand ranges from 478.1 to 566.2 N, for RFDmax it ranges from 1742.6 to 2119.0 N/s and for I mp F 50%max 9516.7 to 16845.1 Ns. e results have shown that it is reliable to measure all three examined contractile hand characteristics where by ICC ranges from 0.938 to 0.977 for F max , from 0.903 to 0.971 for RFD max and from 0.747 to 0.943 for I mp F 50%max . e second try as the better result should be considered the representational value for F max and RFD max variables, regardless of the hand dominance or age group. While for the variable I mp F 50%max , in the age groups from 35.0 to 49.9 and from 50.0 to 69.9, the rst tested try for both hands should be considered, in 14.0 to 19.9 years group the second try should be taken into consideration, and in 20.0 to 34.9 age range, the better result of the non-dominant hand is the rst try, and of the dominant is the second try.

Handgrip Muscle Force Characteristics With General Reference Values at Chelyabinsk and Belgrade Students

“…This study has determined that averaged values for F max for non-dominant, dominant hand and summarized results for females are between 249.5 to 258.5 N, 258.5 to 279.1 N, and 511.0 to 537.6 N, while for males they are between 463.8 to 502.8 N, 497.3 to 517.1 N, and 961.1 to 1019.9 N, respectively ( Table 1). All results are in line with previously published age group standards [14,21], but lower than standards for athletes [13]. When we consider the fact that maximal HG force values are age-dependent and reach maximal level approximately between 30 and 35 years regardless of gender, we can infer that tested samples in our study have not yet reached full biological maturity according to the maximal strength potential [21].…”

“…The handgrip isometric test protocol with standardized procedures and equipment, i.e. a sliding device with a fixed strain gage (All4gym d.o.o., Serbia) that measures isometric hand and finger flexor force, was used [14,23]. During the test, students were sitting upright in the middle of the free surface of the chair and holding the measuring device in the tested hand.…”

“…Hand muscle strength expressing the achieved level of maximal muscle force should be easily measured by applying the maximum handgrip (HG) test [13]. Also, HG test is highly reliable, valid and health status responsive, very easy to administer, and widely used as a simple marker of overall body strength in adults [3,14], overall body strength in children, adolescents and young adults [22], robust marker of aging and general health status [18], and very useful testing tool in sport and sport testing technology [10,13,15]. HG test results also highly reflect strength of the other muscle groups which is why it is one of the most important tests at clinical and epidemiological studies considering general physical capability and subsequent health at humans [4,5,16,18,21].…”

Moving Past the One-Size-Fits-All Education-Training Model of Police Academies to the Self-Prescribed Individualized Exercise Prescription Model

“…Maximal force of the left- and right-hand grip was assessed following the procedures previously described in research [ 62 , 63 ]. In short, cadets were in a sitting position, with the arm slightly flexed (about 160–170° between the forearm and upper-arm) and slightly abducted, just so the upper-arm does not touch the body.…”

Mechanical and Functional Characteristics of Hand Grip Strength in Young Female Handball Players

“…There is strong evidence in the scientific literature that HG is highly reliable when it comes to estimating physical abilities as well as genetic, biological and behavioural potentials of a person. It has also been proven that it represents a simple marker of general body power and strength in children, adolescents, young people and adults regardless of gender (Bohannon, 2001;Frederiksen et al, 2002;Wind, Takken, Helders, & Engelbert, 2010;Atkinson et al, 2012;Sayer & Kirkwood, 2015;Marković, Dopsaj, Koropanovski, Ćopić, & Trajkov, 2018 a ;Dopsaj et al, 2019 b ).…”