scholarly journals Effect of static wrist position on grip strength

2011 ◽  
Vol 44 (01) ◽  
pp. 055-058 ◽  
Author(s):  
Praveen Bhardwaj ◽  
Saumyakumar S. Nayak ◽  
Asif M. Kiswar ◽  
S. Raja Sabapathy
Keyword(s):  
Grip Strength ◽  
Wrist Flexion ◽  
Wrist Extension ◽  
Wrist Arthrodesis ◽  
Left Hand ◽  
Hand Grip ◽  
Ideal Position ◽  
Wrist Fusion ◽  
The Difference ◽  
The Ideal

ABSTRACT Background: Grip strength after wrist arthrodesis is reported to be significantly less than normal. One of the reasons suggested for this decrease in grip strength is that the arthrodesis was performed in a suboptimal position. However, there is no consensus on the ideal position of wrist fusion. There is a paucity of studies evaluating the effect of various fixed positions of the wrist on grip strength and therefore, there is no guide regarding the ideal position of wrist fusion. The authors’ aim was to determine the grip strength in various fixed positions of the wrist and subsequently to find out in which position of wrist fusion the grip strength would be maximal. Materials and Methods: One hundred healthy adults participated in the study. For the purpose of this study, the authors constructed splints to hold the wrist in five different fixed positions: 45, 30 and 15 degrees of wrist extension, neutral and 30 degrees of wrist flexion. The grip strength in all the participants was measured bilaterally, first without a splint and then with each splint sequentially. Results: The average grip strength without the splint was 34.3 kg for right and 32.3 kg for the left hand. Grip strength decreased by 19–25% when the wrist was splinted. The maximum average grip strength with a splint on was recorded at 45 degrees of extension (27.9 kg for right and 26.3 kg for left side). There was a gradual increase in the grip strength with increase in wrist extension but the difference was not statistically significant (P = 0.29). The grip strength was significantly less in flexed position of the wrist (P < 0.001).

Design of Measurement System of the Center of Gravity

2013 ◽  
Vol 706-708 ◽  
pp. 733-736
Author(s):  
Fang Li
Keyword(s):  
Measurement System ◽  
Center Of Gravity ◽  
Actual Position ◽  
Ideal Position ◽  
The Future ◽  
The Difference ◽  
New System ◽  
The Ideal

It is very difficult to confirm the position of the center of gravity irregular object.This paper introduces a new system,which can be used in measuring and adjusting of the center of gravity.The irregular object was put on the support parts,then the center of gravity was given.When the actual position was compared with the ideal position,the difference was given. Until actual position and ideal position were coincided,the machining was continuing. Matlab was programmed in this measure system. It will be applied widely in the future.

scholarly journals The Effects of Unit Exercises on the Hand Grip Strength of Arm Wrestlers

2017 ◽  
Vol 5 (6) ◽  
pp. 196
Author(s):  
Sezer S Yonca ◽  
Çelikel B Engin ◽  
Yücel A Serdar ◽  
Karadağ Mustafa ◽  
Savucu Yüksel
Keyword(s):  
Grip Strength ◽  
Exercise Program ◽  
Hand Grip Strength ◽  
Weight Lifting ◽  
Test Analysis ◽  
Significance Level ◽  
Left Hand ◽  
Hand Grip ◽  
Before And After ◽  
The Right

The aim of this research is to evaluate the change in the hand grip strength of the male arm wrestlers before and after a unit of exercise. The participants of the research consist of sportsmen (n=16) of Fırat University arm wrestling team in 18-25 age group.Within the scope of the research, all of the tests and measurements (age, length, body weight, sports age, hand grip strength) were carried out on the experimental group before they started training and the same tests were repeated just after the exercises. A unit of exercise program consisted of warm up, cool down, and 5 sets of weight lifting with 12 repetitions and intensity of 70% that were in that day’s plan and program applied by the trainer.While descriptive statistics were adopted in the statistical analysis, to identify the significance level between the hand grip strength before and after the exercise paired sample t-test analysis was used. The significance level was shown as α = 0.05 in the analyses. While the right hand grip strength of the sportsmen (n=16) was statistically significant at 51.1062 ± 1.69709 before and 49.0437 ± 1.71770 (p=0.000) after the exercise, the left hand grip strength was statistically significant at 46.9000 ± 1.16179 before and 45.8063 ± 1.30078 (p=0.000) after the exercise.In conclusion, it was observed that there is a statistically significant negative decline in the hand grip strength of the arm wrestling sportsmen after a unit of exercise and it can be said that it is because of the exhaustion expected after the exercise.

scholarly journals Strength and Reaction Time Capabilities of New Zealand Polo Players and Their Association with Polo Playing Handicap

2019 ◽  
Vol 4 (3) ◽  
pp. 48 ◽  
Author(s):  
Regan Standing ◽  
Russ Best
Keyword(s):  
New Zealand ◽  
Reaction Time ◽  
Grip Strength ◽  
Statistical Significance ◽  
Correlation Coefficients ◽  
Hand Grip Strength ◽  
Left Hand ◽  
Hand Grip ◽  
Right Hand ◽  
Physical Attributes

Polo is an equestrian team sport consisting of four players per team, with level of play determined by cumulative player handicap (−2 to +10 goals), with a higher handicap denoting a better player. There is minimal literature investigating Polo players’ physical attributes, hence the understanding of the physical characteristics that may contribute to an improved handicap are unknown. This study sought to identify the relationship between pertinent strength measures (left and right hand grip strength; absolute and relative isometric mid-thigh pull) and reaction time in Polo handicap in 19 New Zealand Polo players, and ascertain whether handicap could be predicted by these measures. Correlation coefficients were expressed using R values, accompanying descriptors and 90% confidence intervals (C.I.). Variance explained was expressed via the R2 statistic, and statistical significance set at p < 0.05. Right hand grip strength, isometric mid-thigh pull values were found to significantly correlate to and explain variance within Polo player handicap (all moderate to large correlations; p < 0.05). Whereas left hand grip strength (R: 0.380; 90% C.I. −0.011 to 0.670) and reaction time (0.020; −0.372 to 0.406) were non-significant, moderate and trivial correlates and predictors of handicap respectively. Practically, these findings highlight the differing roles between rein and mallet hands of Polo players and emphasise the importance of a strong and stable platform when riding and striking the ball. Lack of association with reaction time may be explained in part by higher handicapped Polo players employing a more proactive approach to the game.

OUTCOME OF UNSTABLE DISTAL RADIUS FRACTURES TREATED WITH OPEN REDUCTION AND INTERNAL FIXATION VERSUS EXTERNAL FIXATION

Hand Surgery ◽  
2012 ◽  
Vol 17 (02) ◽  
pp. 173-179 ◽  
Author(s):  
Emmanuel P. Estrella ◽  
Paulo L. Panti
Keyword(s):  
Grip Strength ◽  
Distal Radius ◽  
Clinical Results ◽  
Distal Radius Fractures ◽  
Wrist Flexion ◽  
Radius Fractures ◽  
Wrist Extension ◽  
Ulnar Deviation ◽  
Mayo Wrist Score ◽  
Score Range

The objective of this study was to compare the clinical results of unstable distal radius fractures treated with ORIF with plate and screws compared to EF. Patients with unstable distal radius fractures treated with ORIF or EF from January 2005 to December 2010 were reviewed in terms of the Modified Mayo Wrist Score, range of motion, pain, grip strength, and radiologic parameters. Results showed that there was no difference in the Modified Mayo Wrist Score between ORIF (17 patients) and EF (11 patients) (p = 0.07). The ORIF group had better wrist flexion, wrist extension, pronation and supination compared to the EF group (p < 0.05). There were no significant differences in terms of radial and ulnar deviation, grip strength, pain and postoperative radiologic parameters (p < 0.05). Better wrist flexion, wrist extension and forearm rotation can be expected in ORIF compared to EF in the management of unstable distal radius fractures.

scholarly journals Assessment of Wrist Function After Simulated Total Wrist Arthrodesis

Hand ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. 464-468 ◽  
Author(s):  
Richard M. Hinds ◽  
Eitan Melamed ◽  
April O’Connell ◽  
Francoise Cherry ◽  
Monica Seu ◽  
...  
Keyword(s):  
Grip Strength ◽  
Functional Limitation ◽  
Test Duration ◽  
Fusion Model ◽  
Optimal Position ◽  
Wrist Arthrodesis ◽  
Ulnar Deviation ◽  
Radial Deviation ◽  
Wrist Fusion ◽  
Wrist Function

Background: There is poor consensus in the literature regarding associated functional limitation and the preferred wrist position for total wrist arthrodesis. The purpose of the current investigation was twofold: (1) to assess the functional limitations of wrist arthrodesis and (2) to determine the optimal position for wrist arthrodesis using a simulated wrist fusion model. Methods: Twenty healthy volunteers underwent simulated wrist arthrodesis in 6 different positions using custom-molded wrist splints: 15° extension with 0° radio-ulnar deviation, 15° extension with 10° ulnar deviation, 15° extension with 10° radial deviation, 0° extension with 0° radio-ulnar deviation, 0° extension with 10° ulnar deviation, and 0° extension with 10° radial deviation. Each volunteer was independently assessed for wrist function using the Jebsen-Taylor hand function test, grip strength, and satisfaction in the simulated wrist fusion positions. Comparisons between all simulated fusion wrists and the baseline unsplinted wrist as well as among the 6 simulated fusion positions were performed. Results: Turning over a card (5.1 vs 4.3 seconds), picking up small objects (7.1 vs 5.8 seconds), and simulated feeding (8.3 vs 7.1 seconds) as well as total Jebsen-Taylor test duration (41.8 vs 37.9 seconds) was significantly longer in simulated fusion wrists. Both grip strength (55.9 vs 80.7 kg) and satisfaction scores (6.4 vs 9.6) were lower in simulated fusion wrists. Wrists in 0° extension also demonstrated significantly shorter durations in stacking checkers than wrists in 15° extension. Conclusion: Our findings suggest that wrist arthrodesis may only compromise select wrist functions. Among the tested wrist fusion positions, wrists fused in neutral may demonstrate better function than wrist fused in slight extension. However, grip strength and satisfaction seem to be unaffected by wrist fusion position.

Clinical outcomes of proximal row carpectomy versus four-corner arthrodesis for post-traumatic wrist arthropathy: a systematic review

2014 ◽  
Vol 40 (5) ◽  
pp. 450-457 ◽  
Author(s):  
B. M. Saltzman ◽  
J. M. Frank ◽  
W. Slikker ◽  
J. J. Fernandez ◽  
M. S. Cohen ◽  
...  
Keyword(s):  
Systematic Review ◽  
Grip Strength ◽  
Complication Rate ◽  
Contralateral Side ◽  
Wrist Flexion ◽  
Proximal Row Carpectomy ◽  
Non Union ◽  
Radial Deviation ◽  
Hand Grip ◽  
Flexion Extension

We conducted a systematic review of studies reporting clinical outcomes after proximal row carpectomy or to four-corner arthrodesis for scaphoid non-union advanced collapse or scapholunate advanced collapse arthritis. Seven studies (Levels I–III; 240 patients, 242 wrists) were evaluated. Significantly different post-operative values were as follows for four-corner arthrodesis versus proximal row carpectomy groups: wrist extension, 39 (SD 11º) versus 43 (SD 11º); wrist flexion, 32 (SD 10º) versus 36 (SD 11º); flexion-extension arc, 62 (SD 14º) versus 75 (SD 10º); radial deviation, 14 (SD 5º) versus 10 (SD 5º); hand grip strength as a percentage of contralateral side, 74% (SD 13) versus 67% (SD 16); overall complication rate, 29% versus 14%. The most common post-operative complications were non-union (grouped incidence, 7%) after four-corner arthrodesis and synovitis and clinically significant oedema (3.1%) after proximal row carpectomy. Radial deviation and post-operative hand grip strength (as a percentage of the contralateral side) were significantly better after four-corner arthrodesis. Four-corner arthrodesis gave significantly greater post-operative radial deviation and grip strength as a percentage of the opposite side. Wrist flexion, extension, and the flexion-extension arc were better after proximal row carpectomy, which also had a lower overall complication rate. Level of evidence: Level III (Level I-III studies), Systematic Review. Therapeutic.

scholarly journals The Relationship of Digit Ratio (2D:4D) With Cerebral Lateralization and Grip Strength in Elite Swimmers

2018 ◽  
Vol 6 (4) ◽  
pp. 84
Author(s):  
Hakan Acar ◽  
Nebahat Eler
Keyword(s):  
Grip Strength ◽  
Hand Preference ◽  
Hand Grip Strength ◽  
Dominant Hand ◽  
Men And Women ◽  
Left Hand ◽  
Hand Grip ◽  
Elite Swimmers ◽  
The Relationship ◽  
Right And Left Hand

The index finger and the 4th finger ratio (2D:4D) is the indicator of the prenatal testosterone. The aim of this study is to investigate the relationship between 2D:4D, hand preference and hand grip strength in swimmers. A total of 80 elite swimmers, participated in the study. Height, body weight, body mass index (BMI), hand 2D:4D finger measurements and hand grip strength tests were performed for athletes. The hand preference was determined by the Oldfield questionnaire and it was evaluated according to the Geschwind score. The data were recorded in the SPSS 20 program and p<0.05 was considered as statistically significant. It was found that in both men and women, a negative correlation was found between right and left hand 2D:4D and both dominant (DHGS) and non-dominant hand grip strength (NDHGS) values. It was found that men had lower 2D:4D ratio than women. For both right and left handed, there was a statistically significant difference between the right and left hand 2D:4D ratios in both men and women (p<0.05) and the dominant hand (DH) 2D:4D ratios were found to be lower than non-dominant hand (NDH) 2D:4D ratios in both men and women (p<0.05)  It can be said that the 2D:4D ratios may be the effect of determining the hand preference, the grip strength and therefore the strength.

scholarly journals Components of physical fitness as prognostic factors for falls in elderly female exercise practitioners: a longitudinal study

2020 ◽  
Vol 33 ◽  
Author(s):  
Giovana Zarpellon Mazo ◽  
Raquel Ester Lima ◽  
Pedro Silvelo Franco ◽  
Leonardo Hoffmann ◽  
Enaiane Cristina Menezes
Keyword(s):  
Physical Fitness ◽  
Grip Strength ◽  
Older Women ◽  
Lower Limb ◽  
Hand Grip Strength ◽  
Left Hand ◽  
Elderly Female ◽  
Hand Grip ◽  
Risk Of Falls ◽  
Falls In Elderly

Abstract Introduction: Physical exercise is used as a strategy for the prevention of falls because it improves the physical fitness of older adults. Objective: To determine which components of physical fitness are predictors of falls in elderly female exercise practitioners. Method: Longitudinal, descriptive, comparative study. The components of physical fitness (upper and lower limb strength and flexibility, agility, aerobic endurance, and hand grip strength) and the occurrence or not of falls in the last 12 months were analyzed in 80 older women practitioners of exercise from 2013 to 2016. Descriptive analysis, ROC curve attributing cut-off points, and binary logistic regression for the prediction of falls were used. Results: The mean age of the participants was 67.46 years (SD=7.65). Over the years, a significant difference between elderly fallers and non-fallers was observed for right hand grip strength (2013 and 2015), left hand grip strength (2014 and 2015), lower limb flexibility (2013, 2014 and 2015), agility (2015), and aerobic endurance (2015). In adjusted analysis, older women with poor lower limb flexibility in 2013 had a higher risk of falls in 2016 (OR=4.98; 95%CI 1.12 - 22.1). Older women with poor flexibility in 2015 also had a higher risk of falls (OR= 6.08; 95%CI 1.06 - 34.67). Conclusion: Poor performance in the lower limb flexibility, right and left hand grip strength, agility and aerobic endurance tests was associated with falls and these components are predictors of future falls in elderly exercise practitioners.

scholarly journals Serum Myokines Levels in Patients with Endogenous Cushing Syndrome and Acromegaly: Cross-Sectional Case−Control Study

2016 ◽  
Vol 71 (3) ◽  
Author(s):  
T. T. Tsoriev ◽  
Z. E. Belaya ◽  
L. Y. Rozhinskaya ◽  
G. A. Melnitchenko ◽  
T. A. Grebennikova ◽  
...  
Keyword(s):  
Young Adults ◽  
Grip Strength ◽  
Cushing Syndrome ◽  
Serum Levels ◽  
Serum Samples ◽  
Cross Sectional ◽  
Hand Grip ◽  
Free Cortisol ◽  
The Difference ◽  
Control Study

Background: Myokines are produced and released by muscle cells in response to muscular contractions. Endogenous Cushing syndrome (CS) and acromegaly cause significant changes in muscle tissue leading to atrophy or hypertrophy. However, there is no data whether these endocrine abnormalities influence myokine secretion. Aims: To evaluate serum levels of myostatin, interleukin-6 (IL6) and irisin in patients with CS and acromegaly. Materials and methods: Fasting serum samples were taken and stored in aliquot at ≤-20°C from consecutive subjects with clinically evident and biochemically confirmed active CS, acromegaly and healthy volunteers matched by age, sex and body mass index (BMI). Commercially available kits were used to assay serum myokine levels. Grip strength was measured by a dynamometer. Insulin-like growth factor-1 (IGF1) was measured by immunochemiluminescence assay (Liaison), twenty-four hours urine free cortisol (24hUFC) ― by immunochemiluminescence assay (Vitros ECi), salivary free cortisol ― by electrochemiluminescence assay (Cobas). One-way ANOVA was utilized to assess the difference between groups. Results: We enrolled 88 subjects: 30 patients suffered from CS (group 1), 28 ― acromegaly (2) and 30 matched healthy controls (3) with no difference among the groups in sex, age and BMI (p=0.492, 0.062 and 0.174 respectively). Mean 24hUFC in subjects with CS and mean IGF1 in subjects with acromegaly were significantly higher as compared to other groups (p0.001). Right-hand grip strength was lower in patients with CS as compared to both patients with acromegaly and healthy subjects (p=0.04). However, among these young adults we did not find statistically significant differences in measured myokines levels: irisin ― p=0.15; IL6 ― p=0.34; myostatin ― p=0.50. There was a significant correlation between myostatin and irisin in the whole group of people and in every separately analyzed subset of patients (p0.001), but no correlation was found between any measured myokines and 24hUFC or IGF1.Conclusions: Hypercortisolism or supraphysiological IGF1 levels do not significantly influence serum levels of myostatin, IL6 and irisin in young adults.

Association between handgrip strength and back strength in adolescent and adult cricket players

2018 ◽  
Vol 32 (4) ◽  
Author(s):  
Deepika Singla ◽  
M. Ejaz Hussain
Keyword(s):  
Body Weight ◽  
Grip Strength ◽  
Handgrip Strength ◽  
Adult Population ◽  
Correlation Coefficients ◽  
Hand Grip Strength ◽  
Left Hand ◽  
Hand Grip ◽  
Large Correlation ◽  
Positive Correlations

AbstractBackgroundAlthough a significant amount of research has been conducted on handgrip strength and its association with anthropometric variables, very few researchers have focused on assessment of back strength and its relationship with anthropometric variables in cricketers.ObjectiveTo investigate the degree of correlation between handgrip strength and back strength in cricket players of different maturity levels and to find the correlations of handgrip strength and back strength with anthropometric variables of age, height, body weight and body mass index (BMI).MethodsTwenty-four adolescents; aged 16.6 ± 0.8 years and 32 adult cricketers aged 24 ± 4.6 years were tested for height, body weight, BMI, hand grip strength and back strength. t values, Cohen’s d and Pearson’s correlation coefficients were calculated.ResultsHand grip strength and back strength were not found to correlate with each other at p ≤ 0.05 in adolescent players while a statistically significant large sized correlation was observed in adult cricketers at p = 0.001. Back strength and body weight were found to have a statistically significant moderate sized correlation with each other (r = 0.453 in the adolescent group and r = 0.355 in the adult group). Significant positive correlations were observed for left hand grip strength with height, body weight and BMI and also between back strength and age in the adult population of cricketers.ConclusionA significantly large correlation exists between handgrip strength and back strength in adult cricketers with no such correlation found for adolescent cricketers. Data of the present study justify its utility in the case of selection, assessment and rehabilitation of cricket players.

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