• Journal of the Ergonomics Society of Korea
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• v.28 no.3
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• pp.41-47
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• 2009

The purpose of this study, during the lifting task was researching the difference and a relationship between the ground reaction force and the grip strength by change of position. After grip strength has measured in symmetry position and asymmetry position at 45cm and 75cm of height of hand, ground reaction force was measured by same attitude lifting wooden box. We analyzed the difference of grip strength and ground reaction force in each position change. The results of grip strength, the grip strength of both hand were significant difference that in study subject symmetry and asymmetry position (p<0.01). The results of symmetry lifting task, the study subjects was significant difference of the ground reaction force difference by height (p<0.05). Asymmetry lifting task was significant difference of ground reaction force difference by direction of rotation was changed (p<0.01). The result of it will rotate with non-dominant hand side of lifting tasks from height 75cm where it easily maintains a balance possibility and decreasing the load of the hand. Therefore, from the workshop in the work people, it will be between the height 75cm and non-dominant hand side of trunk rotatory direction in the lifting tasks. Future study is necessary researched about the change of grip strength when the height of the hand is higher, and the difference of the ground reaction force when the change of weight.

• Safety and Health at Work
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• v.9 no.1
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• pp.59-62
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• 2018

Background: Several grip strength tests are commonly used for detecting sincerity of effort. However, there is still no widely accepted standardized sincerity of effort test. Therefore, this study aimed to examine whether grip strength test in three wrist positions could distinguish between maximal and submaximal efforts. Methods: Twenty healthy individuals (10 men and 10 women) with a mean age of $26.7{\pm}3.92years$ participated in this study. All participants completed two test conditions (maximal and submaximal efforts) in three wrist positions (neutral, flexion, and extension) using both hands. Each participant exerted 100% effort in the maximal effort condition and 50% effort in the submaximal effort condition. The participants performed three repetitions of the grip strength test for each session. Results: The results showed that there is a significant main effect of the type of effort (p < 0.001), wrist position (p < 0.001), and hand (p = 0.028). There were also significant types of effort and wrist position interactions (p < 0.001) and effort and hand interactions (p < 0.028). The results also showed that grip strength was highest at the wrist in neutral position in both the maximal and the submaximal effort condition. Grip strength values of the three wrist positions in the maximal effort condition were noticeably greater than those in the submaximal effort condition. Conclusion: The findings of this study suggest that grip strength test in three wrist positions can differentiate a maximal effort from a submaximal effort. Thus, this test could potentially be used to detect sincerity of effort in clinical setting.

• PNF and Movement
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• v.20 no.1
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• pp.73-81
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• 2022

Purpose: The aim of this study was to present specific criteria for setting goals for hand rehabilitation by comparing the degree of difference in grip force, coordination, and dexterity between the dominant and non-dominant hand according to gender. Methods: We recruited 100 healthy adults in their 20s and 30s. A handheld digital dynamometer was used to evaluate the grip force of each of the dominant and non-dominant hand, a chopsticks manipulation test was used to evaluate coordination, and the Purdue Pegboard test was used to evaluate agility. Results: In all subjects, the grip force, coordination, and dexterity showed statistically significant difference (p <0.01) between the dominant and non-dominant hand. In the comparison according to gender, both male and female dominant and non-dominant hands showed statistically significant differences in grip force, coordination, and dexterity (p <0.01). In the comparison according to grip force, there was a statistically significant difference between the dominant and non-dominant hand, and men showed stronger result values in both hands compared to women (p <0.01). In the comparison according to coordination, there was no statistically significant difference between the dominant and non-dominant hand in men and women (p >0.05). In the comparison according to dexterity, there was a statistically significant difference between the dominant and non-dominant hand, and women were shown to be faster in performance time with both hands, compared to men (p <0.01). Conclusion: Differences according to gender exist in grip force and dexterity but not coordination, and differences between dominant and non-dominant hand exists across all measurements. The results suggest setting a recovery goal according to dominance and gender during rehabilitation of hand function.

• Journal of the Korean Society of Physical Medicine
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• v.3 no.4
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• pp.293-299
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• 2008

Purpose : The purpose of this study was to investigate the effect of color stimuli on the grip power and the pinch power. Methods : For this experimental study, total 59 healthy college students, who were divided into Red color group and Green color group. Each group was assessed before and after color stimuli(10minutes). Subjects were for using standardized positioning with shoulder adducted and neutrally rotated, elbow flexed at 90 degree and the forearm and wrist in neutral position. Results : All the two groups showed significant differences in the variation of grip power and pinch power under color stimuli(P>.05) but there was no significant variation in grip power and pinch power among groups. Conclusion : This study precedes following study which is focused on the proposal of suitable or appropriate color circumstance for treatment room. Further studies are need with more subjects on long-term outcome.

• Korean Journal of Applied Biomechanics
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• v.15 no.2
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• pp.113-117
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• 2005

As a preliminary study of finding the relationship between the force at the grip and the success rate during putting stroke, the putting grip sensor system using FSR sensors was developed. The system consisted of the hardware which had the sensor part with 8 sensors per putting glove and data acquisition part as well as the software which had the real-time monitoring program and the offline post-processing program. After experiments with elite-golfer using this system, it is possible to suggest the proper force ranges at the grip during putting stroke.

• Journal of Korean Clinical Health Science
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• v.3 no.3
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• pp.409-418
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• 2015

Purpose. This study was to investigate the relationship between hand function and characteristics of hand. Methods. Participants were 56 occupational therapy students who studied in M colleges in Gyengsangnam-do, april 20, 2015 from 1 May, and hand circumference and length (vertical, w), the width was measured. A hand grip on the measurement subject was measured by the Grip dynamometer and Pinch gauge. Results. The results was hand length, width, circumference long, broad, thick, and hand strength was a greater correlation emerged. Grip strength was showed a significant correlation to the size and grip strength was also correlated. Conclusion. This study was correlation of length of the hand, a length wide and strength of the finger circumference.

• Journal of the Korean Society of Physical Medicine
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• v.7 no.4
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• pp.525-533
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• 2012

PURPOSE: The purpose of this study was to investigate initial effects of the non-elastic taping technique on grip strength and EMG in female with lateral epicondylalgia. METHODS: Twenty-two participants (mean age SD, $52.8{\pm}10.2$ years) with chronic lateral epicondylalgia (mean duration${\pm}$SD, $13.1{\pm}9.9$ months) participated in a placebo control study of an elbow taping technique. Outcome measures were pain-free grip and EMG taken before, immediately after application of tape. RESULTS: The experimental group were more significantly improved grip strength and muscle activity of forearm than control group. CONCLUSION: This study show that non-elastic taping technique is beneficial intervention for increase grip strength and EMG in female with lateral epicondylalgia.

• Journal of Home Health Care Nursing
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• v.25 no.1
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• pp.96-104
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• 2018

Purpose: This study compared factors related to fear of falling among women in the early phase of old age based on hand grip strength. Methods: Researchers obtained data of 1,071 women who had participated in the 4th Korean Longitudinal Study of Aging. Data were analyzed using multiple regression analysis. Results: In both groups, fear of falling was positively correlated with falling experience within two years, osteoarthritis-related leg pain, depression, and instrumental daily life abilities; however, self-rated health was negatively correlated. In the low hand grip strength group, self-rated health, osteoarthritis-related leg pain, and hand grip strength accounted for 21.3% of the variance regarding fear of falling. In the normal hand grip strength group, age, self-rated health, fall experience within two years, osteoarthritis-related leg pain, and depression significantly accounted for 16.6% of the variance regarding fear of falling. Conclusion: In applying interventions to prevent falling in women in the early phase of old age, health care workers must verify if women have low hand grip strength and determine whether to focus on fitness improvement through exercise interventions or consider psychological interventions for depression.

• The Journal of Korean Physical Therapy
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• v.25 no.2
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• pp.110-116
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• 2013

Purpose: This study was conducted in order to determine the physical effect on grip strength and balance ability of progressive resistance training using an elastic band for middle elderly women. Methods: We randomly recruited 13 middle elderly female subjects (from 75 years old to 84 years old). They practiced the elastic band exercise for 50 minutes once every week and were instructed to perform the same exercise as a home exercise for 16 weeks. Subjects who participated voluntarily had not participated in any other exercise program. Grip strength, one leg stance, and TIme Up & Go Test (TUG) were measured before and after elastic band exercise using the one group pre-posttest design. Wilcoxon's signed ranks test and simple regression analysis were performed using SPSS 18.0. Results: Significant differences in TUG and grip strength test scores were observed pre and post exercise (p<0.05), except one leg stance test. Significant correlation was observed only between age and change of right one leg stance. Conclusion: Progressive resistance training using an elastic band for middle elderly women was effective for dynamic balance and grip strength, but was not effective for static balance. Therefore, investigation of factors that affect improvement of static balance using an elastic band and the lasting duration of the effect and its association with age will be necessary in the future.

• Journal of International Academy of Physical Therapy Research
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• v.2 no.1
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• pp.201-206
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• 2011

In using both hands, everyone dominantly use one hand and it is called left-handedness or right-handedness person. Measurements of grip and pinch strength provide objective indexes to represent functional integrity of the upper extremity. This study was conducted for thirty female college students(19 right-handedness and 11 lefthandedness). For assessment of the type of handedness, questionnaire was used; for grip strength, Jamar dynamometer was used; for pinch strength, Jamar pinch gauge was used. In right handedness, the grip and pinch strength of the dominant right hand was significantly higher than those of the non-dominant hand. In addition, regular exercises were shown to give influences on reduction of strength gaps between dominant and non-dominant hands. In both groups of left and right handedness, the grip and pinch strength of the dominant hand were significantly higher than those of the non-dominant hand, and regular exercises were shown to give influences on reduction of strength gaps between dominant and non-dominant hand.