scholarly journals Is salivary cortisol moderating the relationship between salivary testosterone and hand-grip strength in healthy men?

2016 ◽  
Vol 17 (2) ◽  
pp. 188-194 ◽  
Author(s):  
Blair T. Crewther ◽  
Andrew G. Thomas ◽  
Steve Stewart-Williams ◽  
Liam P. Kilduff ◽  
Christian J. Cook
Keyword(s):  
Grip Strength ◽  
Salivary Cortisol ◽  
Hand Grip Strength ◽  
Healthy Men ◽  
Salivary Testosterone ◽  
Hand Grip ◽  
The Relationship

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 The relationship between smartphone usage duration (using smartphone’s ability to monitor screen time) with hand-grip and pinch-grip strength among young people: an observational study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Ahmad Osailan
Keyword(s):  
Young People ◽  
Grip Strength ◽  
Screen Time ◽  
Hand Grip Strength ◽  
Monitor Screen ◽  
Young Males ◽  
Pinch Grip ◽  
Hand Grip ◽  
Grip Strength Measurement ◽  
The Relationship

Abstract Background The use of smartphones has become widely popular, especially among young people, for multiple purposes other than communication, including gaming and internet browsing. The hand and wrist weakness is one of the main complications associated with the increased use of smartphones. This weakness occurs due to the repetitive flexion and extension of the wrist, thumb, and fingers, leading to a significant musculoskeletal pathology. Little is known about the relationship between smartphone usage duration (using the phones ability to monitor screen time) and hand-grip, pinch-grip strength. Therefore, the study was aimed to investigate the association between smartphone usage duration and hand-grip, pinch-grip strength among young people. Methods One hundred young males volunteered to participate in the study. Participants were briefly examined for height and weight using a portable stadiometer and a digital scale. Hand-grip, pinch-grip strength measurement was performed using a hand-held dynamometer. Smartphones usage duration was obtained from the daily average screen time reported in the last seven days. Results Mean daily usage of smartphone among the participants was 7.8 ± 2.2. There was a weak significant inverse relationship between smartphone usage duration and hand-grip strength (r=-.22, p = .03) and pinch-grip strength (r=-.28, p = .004). Linear regression revealed that 18.8 % of the variance in hand-grip strength and 20.4 % of the variance in pinch-grip strength was explained by age, and smartphone usage duration, with the addition of BMI only to hand-grip strength (p’s < 0.00). Conclusions Prolonged use of smartphones was related to weaker hand-grip and pinch-grip. Despite the weak relationship, the study showed that smartphone usage duration might contribute as a factor along with age to hand muscles’ strength.

scholarly journals The Relationship of 2D:4D Ratio and Hand Grip Strength to the Incidence of Multiple Sclerosis

2018 ◽  
Vol 2 (3) ◽  
pp. 85-91 ◽  
Author(s):  
Hamid Arazi ◽  
◽  
Roghayeh Bavafa Birak Olia ◽  
Shahriar Nafissi ◽  
Nahid Beladi Moghadam ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Grip Strength ◽  
Hand Grip Strength ◽  
Hand Grip ◽  
Relationship Of ◽  
The Relationship

scholarly journals Influence of Physical Aspects and Throwing Velocity in Opposition Situations in Top-Elite and Elite Female Handball Players

2018 ◽  
Vol 63 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Carmen Ferragut ◽  
Helena Vila ◽  
Jose Arturo Abraldes ◽  
Carmen Manchado
Keyword(s):  
Grip Strength ◽  
Vertical Jump ◽  
Body Height ◽  
Hand Grip Strength ◽  
Dominant Hand ◽  
Hand Grip ◽  
Arm Span ◽  
Significant Difference ◽  
Student’S T ◽  
The Relationship

Abstract The relationship between anthropometric and physical characteristics of female handball players and throwing velocity is considered an important factor in handball performance. The aim of this study was to examine key differences in anthropometric and fitness characteristics between top elite and elite female players competing in the first Spanish handball league. A total of 89 players from the first Spanish handball league were divided into two groups, top elite (38) and elite (51) players, and assessed for anthropometric and fitness characteristics (throwing velocity, vertical jump and hand grip strength). A Student’s t-test was used to determine whether a statistically significant difference between the two different levels of play occurred. Significant differences were found in age, body height, body mass, arm span, muscle mass, different girths (tensed and flexed arm, forearm, wrist, ankle), dominant hand width and length, different breadths (biacromial, bitrochanteric, bistyloid breadth and biepicondylar humerus) and fitness characteristics (hand grip strength and throwing velocity for different positions). Top elite players compared to elite players showed differences in anthropometric characteristics which were mainly located in the upper limbs and mostly were nonmodifiable aspects by training. Furthermore, the best players were able to maintain a high throwing velocity in different tactical situations.

scholarly journals The Effect of Grip Span on Hand-Gripping Control Strength

2013 ◽  
Vol 10 ◽  
pp. 207-213
Author(s):  
Kun Hsi Liao
Keyword(s):  
Grip Strength ◽  
Task Design ◽  
Hand Grip Strength ◽  
Wide Spread ◽  
Hand Grip ◽  
Dependent Variables ◽  
Economic Developments ◽  
Different Diameters ◽  
Relationship Of ◽  
The Relationship

The economic developments and industrial progressions, the automatic operations were getting more wide-spread. However, currently in various operation occasions, the workers are still required to face how to operate all kinds of hand tooling and equipments. In the industrial cases, there were many opportunities to use hand grip strength to operate machines. Hand grip strength has received increasing attention from industrial engineers and ergonomic researchers. The relation between hand grip strength and tools grip span was important issues in ergonomics. Occasionally, it was little research to conduct. This study aims at exploring the relationship of tools grip span and hand grip strength. Seventy two subjects rose from volunteers participators, including 29 males and 43 females. Dependent variables were maximum volitional contraction and hand gripping control (HGC-70%, target value 70% MVC). Three different diameters of grip span were significance differences in maximum volitional contraction and hand gripping control. The study finds that the best diameter of tools grip span was 47.6 mm. The finding will be served as a reference for task design, instrument design as well as for disease protected for industrial staffs.

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