Hand Length Research Articles

Optimizing talent identification and development in finswimming athletes: Challenges and innovative solutions

The main objective of this article is to highlight the components of anthropometry, biomotor abilities, and skills related to the identification and development of young athletes’ talent and to propose several possible solutions that practitioners and researchers can consider to optimize talent identification. A total of 60 Intermediate First students were recruited and tested for anthropometry, biomotor abilities, and skills. The subjects selected for this study were chosen based on the criteria that they had participated in extracurricular swimming activities and could swim freestyle for 50 meters. The results show that anthropometry is an important factor, with the following values: height (TB) 0.895a, lean body weight (BBTL) 0.832a, leg length (PTU) 0.819a, hand length (PTA) 0.738a, arm span (RL) 0.705a, and body weight (BB) 0.682a. The biomotor values are as follows: explosive power of leg muscles (DLOT) 0.896a, left ankle dorsiflexion (ADFKI) 0.797a, leg muscle strength (KOT) 0.701a, right ankle dorsiflexion (ADFKA) 0.683a, explosive power of arm muscles (DLOL) 0.638a, arm muscle strength (KOL) 0.637a, left ankle plantar flexion (APLKA) 0.514a, and right ankle plantar flexion (APLKI) 0.545a. Several skill characteristics that significantly influence bi-fin swimming athletes’ talents include breathing using a snorkel (BMS) 0.579a, swimming 100 meters using a snorkel and fins (B100) 0.532a, and underwater kicking for 15 meters (UW15) 0.500a. These findings provide proof that components of anthropometry (BB, TB, PTU, PTA, RL, and BBTL), biomotor abilities (KOT, ADFKI, ADFKA, APFKI, APFKA, KOL, DLOT, and DLOL), and skills (BMS, B100, and UW15) related to the identification and development of young athletes’ talent in finswimming (bi-fins) can provide solutions and a strong foundation to support the development of athletes’ talent. However, further research is required to confirm and validate this finding.

Correlation of Stature and Hand Dimension Among Medical Students of South Tamil Nadu, India

Background & Objectives Estimation of stature from the incomplete skeletal remains have importance in personal identification in the events of murders, accidents or natural disasters and considered as one of the biggest challenges of forensic science. Objectives: To study the relationship of stature in relation with hand dimensions and to derive a mathematical model to predict the stature from hand dimensions. Methods This cross-sectional study was done among 50 medical students studying at a medical college in South Tamilnadu. Age, gender, hand dimensions and height of all the subjects were noted. Pearson correlation was done to find the correlation between hand dimensions and height. Linear regression was used to derive the equations to predict the stature of an individual using various dimensions of hands. Results The mean age of the study population was 20.06 ± 1.28 years. Regression equations were derived to predict the stature of an individual with length and breadth of right and left hand. There was statistically significant positive correlation between stature and dimensions of both right and left hand. Linear regression equations were derived to predict the stature of an individual with any of the hand dimensions. Interpretation & Conclusion Hand dimensions have statistically significant positive correlation with the stature. The length or breadth of the right or left hand can be used to predict the stature of an individual. Keywords: Breadth of hand, Height, Identification, Length of hand, Linear regression, Prediction, Stature.

A model for the estimation of height and body mass index from arm span and to determine the socio-demographic characteristics cross-sectional study of Bowen University Students

Arm span is the most reliable anthropometric measurement to predict the stature of an individual. Arm span, hand length, foot length, head circumference etc., have been proven to be useful to correctly estimate the height of a person. This study was intended to derive a model for the estimation of height and body mass index from arm span and also to determine the socio-demographics characteristics of the participants. Samples of 500 students in Bowen University were used for this research (250 males and females respectively) with varying ethnicity. Heights were measured accurately while Weight was taken using a standard calibrated weight scale; arm span measurement. Analyzed by Pearson’s correlation, the results analysis showed a significant effect of arm span on height on males, and a significant effect of height on BMI in both sexes. There is a significant effect of arm span on BMI on male and no significant effect in females; results from t- test indicated sexual dimorphism in height and arm span but not in BMI.

Preliminary study on hand dimensions as potential predictors of female populations native to forest and savanna zones in Ghana.

The hand is a versatile structure that performs numerous tasks, ranging from exertion of great force such as grip, pinch and torque to execution of precise fine motor skills. The aim of current study was to undertake a preliminary study on hand dimensions as potential predictors of female populations native to the forest and savanna zones of Ghana. A total of one hundred (100) female students aged between 17 and 24years were recruited into this study, comprising of 53 native to the forest zone and 47 native to savanna zone of Ghana between 12th June to 27th July, 2023 at the Department of Anatomy, School of Medicine and Dentistry, Kwame Nkrumah University of Science and Technology. Statistically significant positive correlation was observed between left hand length and right hand length (R = 0.923, p = 0.000). From the binary regression model, it could be speculated that left-hand breadth could predict female populations native to the savanna zone (LHB: β = -2.37, Expβ = 0.09, p = 0.014). However, right-hand breadth and length and left hand length did not show any potential of prediction (RHB: β = 0.900, Expβ = 2.460, p = 0.410; RHL: β = 0.168, Expβ = 1.683, p = 0.803; LHL: β = -0.300, Expβ = 0.741, p = 0.656). The study therefore may speculate that left handbreadth could have the potential to differentiate female populations native to savanna zone from females native to forest zone in Ghana.

Grip strength of law enforcement officers and its implications

Grip strength (GS) plays a vital role for law enforcement officers (LEOs). This study aimed to establish a baseline for LEO GS, compare it with the general population, determine the correlation between LEO GS and body dimensions, and evaluate the implications for occupational performance. A total of 756 male and 218 female LEOs from across the U.S. participated in the study. On average, male LEOs exhibit stronger GS (49.53 kg) than female officers (32.14 kg). Significant differences between LEOs and the general population were observed. GS correlated with hand breadth, hand length, stature, and bideltoid breadth. Approximately 26%–46% of males and 5%–39% of females were identified as being at risk of health, fit, or occupational performance based on their measured GS. Enhancing GS training or avoiding implementing heavy equipment (such as pistols with heavy trigger weight), could improve officer occupational performance, safety, or health.

Handgrip Strength and Upper Limb Anthropometric Characteristics among Latin American Female Volleyball Players.

Background: In volleyball, the upper limb dimensions and grip strength greatly influence offensive and defensive movements during a match. However, the relationship between these parameters remains underexplored in elite female volleyball players. Objective: This study aimed to contrast the upper limb anthropometric characteristics and handgrip strength (HGS) of female elite volleyball players against a control group. Methods: Selected upper limb anthropometric parameters and maximal HGS of 42 female volleyball players and 40 non-athletes were measured. Results: Players exhibited higher values in almost all variables studied than non-athletes. The differences were statistically significant (p < 0.001) except for body mass index and elbow and wrist diameters. Players showed a moderate correlation between dominant HGS and hand parameters (length r = 0.43 and breadth r = 0.63; p < 0.05). Weak correlations were identified with height, upper arm length, elbow diameter, and hand shape index (r = 0.32 to 0.38; p < 0.05). In the non-dominant hand, a moderate correlation with handbreadth (r = 0.55, p ≤ 0.01) and weak correlations with upper arm length, wrist diameter, hand length, and hand shape index (r = 0.32 to 0.35; p ≤ 0.05) was found. Conclusions: These findings underscore the importance of the upper limb anthropometric parameters as predictors of HGS and their utility in athlete selection. Future research should investigate biomechanical factors influencing HGS and injury prevention.

Prediction of Body Height Using Hand Length and Hand Breadth in Pharmacy and Nursing Students at Misrake Ghion College, Northeast Ethiopia: Correspondence.

Prediction of Body Height Using Hand Length and Hand Breadth in Pharmacy and Nursing Students at Misrake Ghion College, Northeast Ethiopia: Correspondence.

Gender Estimation from 2D:4D Ratio and Hand Morphometry by Using Machine Learning Algorithms

Background: The present study was conducted to estimate gender from 2D:4D ratio and hand mor-phometry taken from participants by using machine learning (ML) algorithms. Materials and Methods: The study was conducted retrospectively on 88 men and 96 women be-tween the ages of 18 and 30 who did not have any pathology, deformity or surgical interventions on their hands. Hand width (HW), hand length (HL), second digit length (2D), and fourth digit length (4D) of the individuals were measured as the right (R) and left (L) side by using digital calliper and recorded in Excel. In addition, the ratio between the second digit and fourth digit (2D:4D) of each individual was also recorded. Results: As a result of ML modelling, 0.92 accuracy was obtained with Random forest (RF) algorithm. With RF algorithm, all of the 16 women and 18 of the 21 men in the test set were estimated accu-rately. With SHAP analyzer of RF algorithm, HW-L parameter was found to have the highest contri-bution in estimating gender. The accuracy rates of the other ML models used in the study were found to vary between 0.78 and 0.89. Conclusions: It was found that 2D:4D ratio and hand morphometry measurements, which are fre-quently preferred in gender determination, have higher accuracy rate when examined with ML algorithms. In our study, we concluded that using 2D:4D ratio and hand morphometry in estimating gender provides accurate and reliable data.

Anthropometric survey of dynamic hand dimensions: A pilot study

IntroductionEffective glove design requires understanding hand dimensions and movement. Designers must study hands in static and dynamic postures. They do this to identify key movement points. This study aimed to determine hand size during motion. The goal was to understand and specify how hand shape changes. Methods and materialsThirty dynamic hand dimensions of 100 Iranian males were measured in six postures using photography and three-dimensional modeling. The data were classified and compared based on hand positions. ResultsThe results showed significant differences in hand size during movements. Four hand.dimensions were found to have significant differences (p > 0.05) related to hand posture. Sizes either decreased or increased significantly. The dorsal hand length underwent a significant alteration. This was compared to the palmar hand length during movement. ConclusionThe results of this study help to design gloves with optimal fit, performance and comfort. The results show that the dorsal hand length should be increased, while the palmar hand length should be decreased in the design of the glove pattern. Gloves that are currently made based on static postures cannot provide a good fit. Attention should be paid to the measurement of the hand in dynamic positions.

AFRIMETS supplementary comparison on calibration of caliper

Main textNational Metrology Institutes from 12 African countries, namely Egypt, Morocco, Ghana, Nigeria, Ethiopia, Kenya, Tanzania, Zambia, Zimbabwe, Botswana, Mauritius and South Africa have participated in an international supplementary comparison on the calibration of caliper.This comparison was a part of larger supplementary comparison between 13 African countries for the calibration of hand measuring instruments. This larger comparison which was carried out during the period between December 2019 - December 2022 has been piloted by NIS, Egypt and has been registered in BIPM-KCDB database on December 2019. The artifacts have been prepared by NIS, Egypt and measured before sent to circulate between all participant countries in round-robin scheme and returned back again for NIS, Egypt where a final measurement was made for stability check.The main purpose of these comparisons is to support submission of CMCs for calibration of hand length measuring instruments in BIPM-KCDB.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

AFRIMETS supplementary comparison on calibration of feeler gauges

Main textNational Metrology Institutes from 8 African countries, namely Egypt, Morocco, Nigeria, Tanzania, Zambia, Zimbabwe, Botswana, and South Africa have participated in an international supplementary comparison on the calibration of feeler gauges.This comparison was a part of larger supplementary comparison between 13 African countries for the calibration of hand measuring instruments. This larger comparison which was carried out during the period between December 2019 - December 2022 has been piloted by NIS, Egypt and has been registered in BIPM-KCDB database on December 2019. The artifacts have been prepared by NIS, Egypt and measured before sent to circulate between all participant countries in round-robin scheme and returned back again for NIS, Egypt where a final measurement was made for stability check.The main purpose of these comparisons is to support submission of CMCs for calibration of hand length measuring instruments in BIPM-KCDB.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

AFRIMETS supplementary comparison on calibration of dial gauge

Main textNational Metrology Institutes from 11 African countries, namely Egypt, Morocco, Nigeria, Ethiopia, Kenya, Tanzania, Zambia, Zimbabwe, Botswana, Mauritius and South Africa have participated in an international supplementary comparison on the calibration of Dial Indicators.This comparison was a part of larger supplementary comparison between 13 African countries for the calibration of hand measuring instruments. This larger comparison which was carried out during the period between December 2019 - December 2022 has been piloted by NIS, Egypt and has been registered in BIPM-KCDB database on December 2019. The artifacts have been prepared by NIS, Egypt and measured before sent to circulate between all participant countries in round-robin scheme and returned back again for NIS, Egypt where a final measurement was made for stability check.The main purpose of these comparisons is to support submission of CMCs for calibration of hand length measuring instruments in BIPM-KCDB.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

AFRIMETS supplementary comparison on pin gauges

Main textNational Metrology Institutes from 6 African countries, namely Egypt, Nigeria, Zambia, Zimbabwe, Botswana, and Mauritius have participated in an international supplementary comparison on the calibration of pin gauges.This comparison was a part of larger supplementary comparison between 13 African countries for the calibration of hand measuring instruments. This larger comparison which was carried out during the period between December 2019 - December 2022 has been piloted by NIS, Egypt and has been registered in BIPM-KCDB database on December 2019. The artifacts have been prepared by NIS, Egypt and measured before sent to circulate between all participant countries in round-robin scheme and returned back again for NIS, Egypt where a final measurement is made for stability check.The main purpose of these comparisons is to support submission of CMCs for calibration of hand length measuring instruments in BIPM-KCDB.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

AFRIMETS supplementary comparison on calibration of setting rods

Main textNational Metrology Institutes from 8 African countries, namely Egypt, Nigeria, Kenya, Tanzania, Zambia, Zimbabwe, Botswana, and Mauritius have participated in an international supplementary comparison on the calibration of setting rods.This comparison was a part of larger supplementary comparison between 13 African countries for the calibration of hand measuring instruments. This larger comparison which was carried out during the period between December 2019 - December 2022 has been piloted by NIS, Egypt and has been registered in BIPM-KCDB database on December 2019. The artifacts have been prepared by NIS, Egypt and measured before sent to circulate between all participant countries in round-robin scheme and returned back again for NIS, Egypt where a final measurement was made for stability check.The main purpose of these comparisons is to support submission of CMCs for calibration of hand length measuring instruments in BIPM-KCDB.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCL, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

Sex estimation using Magnetic Resonance Imaging measurements of hand and foot in Egyptian population

BackgroundThe identification of skeletal remains begins with a sex evaluation since other biological profile elements, such as size and age, are sex-specific. The pelvis is the favored element for sex assessment since it is very sexually dimorphic.Aim of the studyDelivering hand and foot bones sex estimate criteria for Egyptian population identification was the goal of this work.Subject and methodsEighty-two Egyptian adult subjects (41 males and 41 females) aged ≥ 21 years old were subjected to MRI scan on the right hand and foot to assess 9 measurements: hand length, hand width, four measurements of middle metacarpal bone (length, breadth, head breadth and base breadth), first metatarsal bone length, first metatarsal bone width and (first metatarsal bone length x first metatarsal bone width).ResultsAll the measured parameters in the right hand and foot were higher in males than females. First metatarsal bone length x first metatarsal bone width in the foot and middle metacarpal bone breadth in the hand were the most sexually dimorphic parameters, with accuracy of 86.6 percent and 84.1 percent, respectively. In stepwise discriminant analysis, three of nine measurements were selected: First metatarsal bone length x first metatarsal bone width, middle metacarpal bone breadth and hand width for the sex prediction equation in the Egyptian population, with a cross-validated sex classification accuracy of 90.2%.ConclusionSex can be assessed from hand and foot metric parameters measured by MRI with high accuracy.

Selection of hand features based on Random Forest algorithm and hand shape recognition

To obtain effective features applicable to hand morphology recognition, the method of obtaining effective feature indicators based on the Random Forest (RF) algorithm to downscale hand morphology parameters is proposed. Firstly, 232 female university students collected three-dimensional hand information, constructed auxiliary point, line, and surface standardised measurement methods, obtained 33 characteristic parts of human dimensions, and used k-means clustering for hand morphology subdivision. Hand morphology can be divided into three categories: short, slender and broad. The RF algorithm is used for feature index importance assessment and hand shape recognition model. The accuracy of the feature metrics determined by the RF algorithm, PCA, and VC method applied to hand shape recognition is compared and analysed to verify the effectiveness of the dimensionality reduction of the RF algorithm. The results showed that the feature indexes used for hand shape recognition were five items: hand length, thickness at the metacarpal, thenar width, the distance between the thumb and index finger, and distance from the root of the little finger to the centre of the wrist. Using the RF algorithm to reduce the dimensionality is more effective; the average recognition accuracy of the four hand shape recognition models is 93.78% on average, compared with PCA and VC reduction methods, the average accuracy of hand shape recognition models is increased by 19.17%, and 14.86% respectively. The study's results can provide methodological references for the objective selection of characteristic indicators and morphological recognition of human body parts.

The Relationship of University Students' Internet Addiction Level Through Telephone Use and 2d:4d Ratio

Aim: To evaluate the relationship between the 2nd and 4th finger measurement ratio (2d:4d) ratio of university students' internet addiction level through phone use. Material and Method: 322 students were questioned about their demografic data, dominant extremity, and the device while using the internet. Hand width (HW), length (HL), grip strength (HGS), 2d:4d measurements were taken. Young Internet Addiction Scale (YIAS) was used for internet addiction, Smartphone Addiction Scale-Short Form (SAS) was used for smartphone addiction. Results: In men, it was determined that there was a statistically significant difference between the groups in terms of Right-Left HL, Left HGS, Right/4d, YIAS and SAS values. In addition, it was determined that the device preference, HL right, HL left, HGS left and Right/4d parameters originated from normal and dependent groups. It was determined that there was a statistically significant difference between the groups in women in terms of Left HL, Right/2d, Right/4d, Left/2d, Left/4d, Young and SAS values. It was determined that the device preference was due to individuals falling into the normal group of Left HL according to the YIAS, and the statistical difference of the Right/2d, Right/4d, Left/2d and Left/4d parameters. It was determined that there was a moderately strong negative correlation between SAS and Right/2d, Right/4d, Left/2d, Left/4d parameters in addicted men. Conclusion: The gender relations of the accepted scales regarding phone and internet addiction may be due to the length of the left hand and the movement function of the right 4d to provide control in phone use, rather than the 2d:4d finger ratios.

Exploring anthropometric and functional factors that influence working adult's handgrip strength in north Australia.

Handgrip strength (HGS) is a reliable assessment of hand function. Interpretation of HGS is commonly done using normative data. Normative HGS data HGS considers the influence of age and gender without adjustment for anthropometric measurements or functional factors known to influence HGS. To determine the potential relationship of select anthropometric measurements (height, weight, hand length and width, forearm length and circumference) and functional factors (hand dominance, work and lifestyle category) to HGS. This study included a sample of 119 males and 96 female workers from North Queensland. HGS and six anthropometric measurements were obtained using calibrated instruments and reliable measurement protocols. Age and gender along with three functional factors were documented by self-report. Right and left mean HGS was greater for individuals who performed heavy/very heavy work (58.1±10.1 kg and 54.1±10.9 kg respectively) compared to light (38.5±12.3 kg and 35.5±11.8 kg) or medium work (44.1±10.8 kg and 40.0±12.9 kg). Mean HGS was greater for individuals who performed heavy/very heavy activity (right 48.5±13.6 kg and left 44.5±13.7 kg) compared to light activity (right 36.3±11.2 kg and left 33.9±11.3 kg) within their lifestyle. HGS positively correlated with gender (p = 0.0001), work (p = 0.001) and anthropometric measurements of forearm circumference (p = 0.001), hand length (p = 0.006) and hand width (p = 0.052). Easy to measure anthropometric measurements of forearm circumference, hand length and width are the strongest predictors of HGS in addition to an individual's physical activity at work and in their lifestyle. Consideration of these factors could lead to improved evaluation of HGS scores.

Identifying the Differences in Symmetry of the Anthropometric Parameters of the Upper Limbs in Relation to Manual Laterality between Athletes Who Practice Sports with and without a Ball

Identifying the Differences in Symmetry of the Anthropometric Parameters of the Upper Limbs in Relation to Manual Laterality between Athletes Who Practice Sports with and without a Ball

35 The Impact of Hand Burns on Strength; An Analysis of the ACT Database

Abstract Introduction Although hand burns comprise a small TBSA percentage, they can have significant functional implications. Multiple studies show grip strength as a predictor of health and quality of life. A decrease in grip strength has been reported in multiple populations with hospital admission; however, there is limited evidence concerning how burns affect hand strength. The purpose of this study was to examine the impact of burns on grip strength, measured at hospital discharge. Methods This study is a retrospective review of data from the prospective Burn Patient Acuity Demographics, Scar Contracture and Rehabilitation Treatment Related to Patient Outcome Study (ACT). Patients had grip strength measured of both hands 3 times consecutively at discharge. Data related to grip strength of patients with burn injuries were compared to age- and sex-matched normative values. Burn characteristics, including presence of hand burns, skin grafting, and length of stay were evaluated. Results There were 307 participants in ACT; 195 (63.5%) had hand burns and met inclusion for analyses. Among those with hand burns, the majority were male (72.8%), right-hand dominant (84.1%), mean ±SD age was 42.9±17.0; LOS, 23.3±22.8 days; and TBSA, 14.5%±13.3. Among patients with hand burns, 112 (57.4%) received skin grafts to at least one hand. Expressed as the percentage of grip strength loss relative to normative data, those with a burn injury to the hand averaged -55.8±33.4%, while those with no burns to the hand averaged -25.7%±36.3%, p &amp;lt; .001. Patients with a skin graft to the hand averaged -65.8±27.2% grip strength, while those with hand burns, but no grafts averaged -36.1%±35.5%, p &amp;lt; .001. Decreased grip strength is associated with increased length of stay, r= .21, p &amp;lt; .001. Conclusions This study of hand strength in burn survivors at the time of hospital discharge corroborates previous reports regarding nosocomial strength loss but specific to the hand. Overall, patients hospitalized with burn injuries lose hand grip strength but more-so if a hand is burned and furthermore if a hand is skin grafted. Applicability of Research to Practice Understanding of the impact of burns on grip strength may help guide clinical decision making, allowing therapists treating those with burn injuries to anticipate deficits and subsequent functional impact. Expectation of a loss of grip strength in patients without burns to the hands should inform treatment planning during acute hospitalization to promote improved function and quality of life.