scholarly journals Effect of peripheral muscle fatigue during the testing of handgrip strength

2014 ◽  
Vol 27 (3) ◽  
pp. 407-412
Author(s):  
Alex de Andrade Fernandes ◽  
Ciro José Brito ◽  
Breno Cesar Vieira ◽  
João Carlos Bouzas Marins
Keyword(s):  
Muscle Fatigue ◽  
Handgrip Strength ◽  
Mean Value ◽  
Physical Work ◽  
Dominant Hand ◽  
Baseline Measure ◽  
Peripheral Muscle ◽  
Final Sample ◽  
Hand Dynamometer ◽  
The Mean

Introduction Muscle fatigue is a phenomenon associated with physical work. It is common in endurance sports, physical fitness tests and daily activities. Some tests can be directly affected by the effect of peripheral muscle fatigue, including the handgrip strength (HGS) test, which is considered baseline measure for assessing the functionality of the hand. Objectives a) verify the effect of peripheral muscle fatigue (between trials) during the testing of HGS, with a 60-second recovery interval; b) to analyze whether there is a difference in considering the mean value obtained in three trials or the best result as the final result. Materials and methods The final sample comprised 1,279 men. We followed the standard methodology and used a hydraulic hand dynamometer. Results There were statistically significant differences (P < 0.05) in the dominant hand among all the trials: first (46.5 ± 8.6 Kgf), second (46.4 ± 8.5 Kgf) and third (46.1 ± 8.6 Kgf); and also in the non-dominant hand: first (44.9 ± 8.4 Kgf), second (44.5 ± 8.3 Kgf) and third (44.0 ± 8.3 Kgf). We also found statistically significant differences (P < 0.05) between the two ways of considering the final result. For the dominant hand, the mean of the three attempts was 46.3 ± 8.3 Kgf and the best result was 48.1 ± 8.5 Kgf, whereas for the non-dominant hand, these results were 44.5 ± 8.2 Kgf and 46.0 ± 8.2 kgf, respectively. Conclusion Peripheral muscle fatigue directly interferes in the final result. A significant reduction in strength levels occurs in course of the assessment. The best result is frequently obtained at the first trial, which indicates that the highest value obtained should be considered as the final result.

scholarly journals Handgrip strength and muscle fatigue among footwear industry workers

2016 ◽  
Vol 29 (2) ◽  
pp. 317-324 ◽  
Author(s):  
Lidiane Angélica Cotelez ◽  
Maysa Venturoso Gongora Buckeridge Serra ◽  
Eliane Ramos ◽  
José Eduardo Zaia ◽  
Flávia Oliveira Toledo ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Muscle Fatigue ◽  
Handgrip Strength ◽  
Strength Test ◽  
Strength Testing ◽  
Test Results ◽  
Irreversible Damage ◽  
Low Correlation ◽  
Footwear Industry ◽  
The Mean

Abstract Introduction: Muscle fatigue can be defined as a decrease in the performance of the neuromuscular system in generating force. This situation is considered a complex physiological process involving various body systems, in order to avoid irreversible damage or even cell death. Objective: The aim of this study was to measure muscle strength in order to assess the level of fatigue among footwear industry workers, and to determine a possible correlation between muscle strength and the perception of reported fatigue. Materials and Methods: The study included 32 male workers from the footwear industry with a mean age of 34.63 ± 11.98 years. The workers performed the handgrip strength test using a handheld dynamometer, and completed the Bipolar Fatigue Questionnaire. Results: The mean result of strength testing was 23.1 ± 8.3 kgf, and the mean score of the fatigue questionnaire was 2.28 ± 0.93 points. However, a low correlation was observed between the results of the fatigue questionnaire and the strength test results. Conclusion: The grip strength results of the footwear workers were below the values for the general Brazilian population, a fact that may indicate potential muscle fatigue. However, a low correlation with the perception of fatigue was indicated by the questionnaire.

scholarly journals Correlation of Body Mass Index with Handgrip Strength and Endurance of Dominant Hand in Medical Students

2020 ◽  
Vol 42 (3) ◽  
pp. 57-61
Author(s):  
Lava Shrestha ◽  
Sanyukta Gurung ◽  
Neeti Bhat ◽  
Narayan B Mahotra ◽  
Mahesh M Bajimaya ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Medical Students ◽  
Body Mass ◽  
Undergraduate Students ◽  
Handgrip Strength ◽  
Extended Period ◽  
Dominant Hand ◽  
Cross Sectional ◽  
Positive Correlation ◽  
Hand Dynamometer

Introduction Hand grip strength is used in evaluation of muscle strength and is also increasingly being used as an indicator for nutritional status. The maximum force applied voluntarily by the subject is called maximum handgrip strength, which is measured in kilograms. Muscular endurance is the ability of a muscle or muscle group to perform against a load for an extended period of time, measured in seconds. This study aims to correlate body mass index with handgrip strength and handgrip endurance in medical students. MethodsThis is a cross sectional, observational study which included 74 undergraduate students of Maharajgunj Medical Campus by convenient sampling method. Body mass index was calculated by Quetelet’s formula. Camry digital hand dynamometer was used to measure handgrip strength in the dominant hand in kilograms. Participants were instructed to hold dynamometer with maintained pressure of 30% of maximum handgrip strength for as long as possible to determine the handgrip endurance. Statistical analyses were performed with SPSS Statistics software. ResultsThe handgrip strength was more in males than females with a mean of 43.09±3.72 kg, while handgrip endurance was more in females with a mean of 123.60±50.65 sec. Positive correlation was seen between body mass index and handgrip strength (r=0.23 and p=0.045). Body mass index and handgrip endurance also showed positive correlation (r=0.34 and p=0.003). ConclusionSignificant correlation of body mass index with handgrip strength and handgrip endurance was seen in medical students.

scholarly journals Association of the dominant handgrip strength with the hand dimensions of adult Bangladeshi female laborers

2021 ◽  
Vol 7 (3) ◽  
pp. 230-237
Author(s):  
Mst Taslima Akter ◽  
Nahid Farhana Amin ◽  
Ahsan Arif
Keyword(s):  
Muscle Function ◽  
Handgrip Strength ◽  
Work Force ◽  
Mean Value ◽  
The Body ◽  
Digital Slide ◽  
Daily Work ◽  
The Mean ◽  
The Right ◽  
Hand Length

The handgrip strength determines the overall physical health and muscle function of the hand. Nowadays in Bangladesh, female laborers are an important source of work force in many industries. Laborers require more handgrip strength to perform their daily work efficiently. Besides, hand is the part of the body that directly related with handgrip strength, so, the hand dimensions are deemed essential to investigate. Therefore this study is to investigate the association of the dominant handgrip strength with the hand dimensions like hand length, hand breadth, hand span, palm length, palm breadth and wrist breadth of adult Bangladeshi female laborers. Hundred (100) adult female laborers aged between 18 to 45 years, residing in different slums in Dhaka city of Bangladesh were the participants of the present research. Six selected hand dimensions of the right side were measured using the digital slide caliper by direct physical procedure and dominant handgrip strength was measured using a digital handgrip dynamometer. The associations of the dominant handgrip strength with the selected six hand dimensions were tested using Pearson’s correlation coefficient test. The mean value of the dominant handgrip strength of the laborers was 25.6 kg. In present research, the dominant handgrip strength was positively associated with the six selected hand dimensions (hand length, hand breadth, hand span, palm length, palm breadth and wrist breadth). However, the association of dominant handgrip strength with the breadth of hand, palm and wrist reached up to significant level individually. Besides, to get desired success in work of a female laborer, it is important to see the hand anthropometry and handgrip strength, because, better handgrip strength lead to better performance in work. Asian J. Med. Biol. Res. 2021, 7 (3), 230-237

scholarly journals COMPARISON BETWEEN PHYSICAL AND NON-PHYSICAL WORK ENVIRONMENT IN PBF X YOGYAKARTA

2020 ◽  
Vol 6 (2) ◽  
pp. 92-98
Author(s):  
Ni Made Ayu Nila Septianingrum ◽  
Fitriana Yuliastuti
Keyword(s):  
Work Environment ◽  
Positive Impact ◽  
Work Productivity ◽  
Mean Value ◽  
Primary Data ◽  
Physical Work ◽  
Cross Sectional ◽  
Physical Work Environment ◽  
The Mean ◽  
Narrative Forms

The convenience of working for employees is one of the keys to success for the company. If employees feel comfortable, their work productivity will increase and have a positive impact on the company. One factor that can provide comfort to employees is the work environment. The work environment is dividing into a physical work environment and a non-physical work environment. This study aims to determine the comparison of physical and non-physical work environments in PBF X in Yogyakarta. The method used is descriptive-analytic, with a cross-sectional approach and using saturated samples. Primary data were obtained by distributing questionnaires to all 25 PBF X employees. Data were processed using Microsoft Excel and presented in tables, diagrams, and descriptive (narrative) forms. The results obtained show a comparison of the mean value of the non-physical work environment is 3.0, and the mean value of the physical work environment is 2.8. The highest mean value in the non-physical work environment is about overtime salaries, while in the physical work environment, selecting paint colors at workplaces appropriate. The conclusion obtained that the non-physical work environment is more influential on respondents doing work in PBF X than the physical work environment. The company or PBF X needs to evaluate to create a comfortable physical work environment for employees so that the working atmosphere can increase company productivity

scholarly journals DESCRIPTIVE STUDY OF HAND INJURY ATTENDED AT TERTIARY CARE HOSPITAL WITH SPECIAL REFERENCE TO ASSESS SEVERITY OF HAND INJURY WITH HISS SCORE

2021 ◽  
Vol 5 (8) ◽  
Author(s):  
Nikhil Bansal ◽  
Sanjay Yadav ◽  
R L Dayma ◽  
Aditya Singh Rathore
Keyword(s):  
Injury Severity ◽  
Recovery Period ◽  
Tertiary Care ◽  
Mean Value ◽  
Hand Injury ◽  
Hand Strength ◽  
Care Hospital ◽  
Dominant Hand ◽  
The Mean ◽  
Traumatic Hand Injury

Background: We conducted this study to establish the predictability of HISS system to hand strength in patients with traumatic hand injury. Methods: This retrospective study was conducted on 30 hospitalized patients for surgery in in Jaipur due to traumatic hand injury. All of them received rehabilitation occupational therapy in the same trauma center with established protocols and were supervised by the same group of therapists within one month after surgery. Passive/active range of motion exercise, hand grip strength training, proprioception/functional training were included in this standardized protocol. Results: The mean age of patients was 41.36±13.69 Yrs. Among them, 23 patients were male and 7 patients were female.  63.33% were dominant hand injured. The mean value of total HISS score is 53.21 ± 36.35. A positive correlation exists between the differences of the strength of two hands, and the severity shown by HISS system. Conclusion: In conclusion, initial anatomical injury severity assessed by HISS system may predict hand strength in traumatic hand injured patients after an adequate recovery period. Poor hand strength could be expected with initial high total HISS score. Keywords: HISS, Hand injury, Palmer pinch.

scholarly journals Evaluation of Effect of Handle Vibration Diesel-Fueled Single-Axle Tractor on Handgrip Strength of Operators

2020 ◽  
Author(s):  
Siraj Busse ◽  
Anthony Sinclair ◽  
Diresibachew Wondimu ◽  
Daniel Reda
Keyword(s):  
Grip Strength ◽  
Handgrip Strength ◽  
Major Effect ◽  
Vibration Exposure ◽  
Dominant Hand ◽  
Average Operator ◽  
Before And After ◽  
The Mean ◽  
Maximum Grip Strength ◽  
Maximum Grip

Abstract Background: The transmission of vibration from a single-axis tractor to the human body is determined by its dynamic response; this, in turn, depends on the physical characteristics of a person's hand, the contact area, the strength of the grip, the push force of the tractor, and the position. The purpose of this work was to measure and evaluate handgrip strength and fatigue resistance for operators of a 15 horsepower single-axle tractor before and after vibration exposure. Methods: Grip strength of dominant and non-dominant hands before and after 30 minutes of tilling operations was measured and recorded. The operators performed tilling tasks with the tractor in third gear, while the vibration levels were measured at the tractor handle along with the vertical, forward, and transverse directions. Results: The average operator grip strength was 33.6 ± 2.7 and 26.3 ± 3.3 kg and the average overall grip strength declined from 39.7 to 29.31 kg, although the average fatigue strength was 27.6 and 26.5 seconds for the dominant hand before and after vibration exposure. For the non-dominant hand, the mean grip strength measured was 28.7±2.9 and 23.1±1.9 kg and the maximum grip strength was 32.79 and 26.25, while fatigue was 29.76 and 22 seconds before and after tilling respectively.Conclusion: The average reduction in grip strength suggest considerable differences in grip strength for dominant and non-dominant hands of single axle tractor operators and shows that vibration transmitted from the single axle tractor handle has a major effect on the operators.

Long-period modulated superstructures in Pd-12.5 at.%Ce and Pd-15 at.%Ce alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 164-165
Author(s):  
Noriyuki Kuwano ◽  
Masaru Itakura ◽  
Kensuke Oki
Keyword(s):  
Electron Microscopy ◽  
Mean Value ◽  
Heavy Elements ◽  
Arc Furnace ◽  
X Ray ◽  
Long Period ◽  
Ultra High Purity ◽  
Heat Treated ◽  
Atomic Scattering ◽  
The Mean

Pd-Ce alloys exhibit various anomalies in physical properties due to mixed valences of Ce, and the anomalies are thought to be strongly related with the crystal structures. Since Pd and Ce are both heavy elements, relative magnitudes of (fcc-fpd) are so small compared with <f> that superlattice reflections, even if any, sometimes cannot be detected in conventional x-ray powder patterns, where fee and fpd are atomic scattering factors of Ce and Pd, and <f> the mean value in the crystal. However, superlattices in Pd-Ce alloys can be analyzed by electron microscopy, thanks to the high detectability of electron diffraction. In this work, we investigated modulated superstructures in alloys with 12.5 and 15.0 at.%Ce.Ingots of Pd-Ce alloys were prepared in an arc furnace under atmosphere of ultra high purity argon. The disc specimens cut out from the ingots were heat-treated in vacuum and electrothinned to electron transparency by a jet method.

Partition Coefficient Ratios and Tumour Perfusion Studied with 85mKr and 133Xe

1987 ◽  
Vol 26 (06) ◽  
pp. 253-257
Author(s):  
M. Mäntylä ◽  
J. Perkkiö ◽  
J. Heikkonen
Keyword(s):  
Partition Coefficient ◽  
Partition Coefficients ◽  
Regional Blood Flow ◽  
Blood Perfusion ◽  
Compartmental Analysis ◽  
Malignant Tumour ◽  
Mean Value ◽  
Perfusion Rate ◽  
Biological Variables ◽  
The Mean

The relative partition coefficients of krypton and xenon, and the regional blood flow in 27 superficial malignant tumour nodules in 22 patients with diagnosed tumours were measured using the 85mKr- and 133Xe-clearance method. In order to minimize the effect of biological variables on the measurements the radionuclides were injected simultaneously into the tumour. The distribution of the radiotracers was assumed to be in equilibrium at the beginning of the experiment. The blood perfusion was calculated by fitting a two-exponential function to the measuring points. The mean value of the perfusion rate calculated from the xenon results was 13 ± 10 ml/(100 g-min) [range 3 to 38 ml/(100 g-min)] and from the krypton results 19 ± 11 ml/(100 g-min) [range 5 to 45 ml/(100 g-min)]. These values were obtained, if the partition coefficients are equal to one. The equations obtained by using compartmental analysis were used for the calculation of the relative partition coefficient of krypton and xenon. The partition coefficient of krypton was found to be slightly smaller than that of xenon, which may be due to its smaller molecular weight.

Detection of Soluble Fibrin Monomer Complexes in Blood by Means of Protamine Sulphate Test

1968 ◽  
Vol 20 (01/02) ◽  
pp. 044-049 ◽  
Author(s):  
B Lipiński ◽  
K Worowski
Keyword(s):  
Human Subjects ◽  
Coronary Thrombosis ◽  
Mean Value ◽  
Healthy Human ◽  
Protamine Sulphate ◽  
Soluble Fibrin ◽  
Fibrin Monomer ◽  
Dog Plasma ◽  
The Mean ◽  
Precipitable Protein

SummaryIn the present paper described is a simple test for detecting soluble fibrin monomer complexes (SFMC) in blood. The test consists in mixing 1% protamine sulphate with diluted oxalated plasma or serum and reading the optical density at 6190 Å. In experiments with dog plasma, enriched with soluble fibrin complexes, it was shown that OD read in PS test is proportional to the amount of fibrin recovered from the precipitate. It was found that SFMC level in plasma increases in rabbits infused intravenously with thrombin and decreases after injection of plasmin with streptokinase. In both cases PS precipitable protein in serum is elevated indicating enhanced fibrinolysis. In healthy human subjects the mean value of OD readings in plasma and sera were found to be 0.30 and 0.11, while in patients with coronary thrombosis they are 0.64 and 0.05 respectively. The origin of SFMC in circulation under physiological and pathological conditions is discussed.

Detection of Circulating Tissue Factor and Factor VII in a Normal Population

1996 ◽  
Vol 75 (05) ◽  
pp. 772-777 ◽  
Author(s):  
Sybille Albrecht ◽  
Matthias Kotzsch ◽  
Gabriele Siegert ◽  
Thomas Luther ◽  
Heinz Großmann ◽  
...  
Keyword(s):  
Tissue Factor ◽  
Normal Population ◽  
Mean Value ◽  
Factor Vii ◽  
Significant Difference ◽  
Age Dependent ◽  
The Mean ◽  
Highly Correlated ◽  
And Gender

SummaryThe plasma tissue factor (TF) concentration was correlated to factor VII concentration (FVIIag) and factor VII activity (FVIIc) in 498 healthy volunteers ranging in age from 17 to 64 years. Immunoassays using monoclonal antibodies (mAbs) were developed for the determination of TF and FVIIag in plasma. The mAbs and the test systems were characterized. The mean value of the TF concentration was 172 ± 135 pg/ml. TF showed no age- and gender-related differences. For the total population, FVIIc, determined by a clotting test, was 110 ± 15% and the factor VIlag was 0.77 ± 0.19 μg/ml. FVII activity was significantly increased with age, whereas the concentration demonstrated no correlation to age in this population. FVII concentration is highly correlated with the activity as measured by clotting assay using rabbit thromboplastin. The ratio between FVIIc and FVIIag was not age-dependent, but demonstrated a significant difference between men and women. Between TF and FVII we could not detect a correlation.

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