scholarly journals Get a Grip: Variation in Human Hand Grip Strength and Implications for Human Evolution

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1142
Author(s):  
Ameline Bardo ◽  
Tracy L. Kivell ◽  
Katie Town ◽  
Georgina Donati ◽  
Haiko Ballieux ◽  
...  
Keyword(s):  
Grip Strength ◽  
Hand Grip Strength ◽  
Directional Asymmetry ◽  
Human Hand ◽  
Hand Dominance ◽  
Form And Function ◽  
Hand Grip ◽  
Hand Shape ◽  
And Function ◽  
Insight Into

Although hand grip strength is critical to the daily lives of humans and our arboreal great ape relatives, the human hand has changed in form and function throughout our evolution due to terrestrial bipedalism, tool use, and directional asymmetry (DA) such as handedness. Here we investigate how hand form and function interact in modern humans to gain an insight into our evolutionary past. We measured grip strength in a heterogeneous, cross-sectional sample of human participants (n = 662, 17 to 83 years old) to test the potential effects of age, sex, asymmetry (hand dominance and handedness), hand shape, occupation, and practice of sports and musical instruments that involve the hand(s). We found a significant effect of sex and hand dominance on grip strength, but not of handedness, while hand shape and age had a greater influence on female grip strength. Females were significantly weaker with age, but grip strength in females with large hands was less affected than those with long hands. Frequent engagement in hand sports significantly increased grip strength in the non-dominant hand in both sexes, while only males showed a significant effect of occupation, indicating different patterns of hand dominance asymmetries and hand function. These results improve our understanding of the link between form and function in both hands and offer an insight into the evolution of human laterality and dexterity.

scholarly journals Effects of hyperthyroidism on hand grip strength and function

2015 ◽  
Vol 52 (6) ◽  
pp. 663-668 ◽  
Author(s):  
Esra Erkol İnal ◽  
Alparslan Bayram Çarlı ◽  
Sultan Çanak ◽  
Oğuzhan Aksu ◽  
Banu Kale Köroğlu ◽  
...  
Keyword(s):  
Grip Strength ◽  
Hand Grip Strength ◽  
Hand Grip ◽  
And Function

scholarly journals Assessment of hand function in women with lymphadenopathy after radical mastectomy

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11252
Author(s):  
Subham Mistry ◽  
Taimul Ali ◽  
Mohammed Qasheesh ◽  
Rashid Ali Beg ◽  
Mohammad Abu Shaphe ◽  
...  
Keyword(s):  
Grip Strength ◽  
Upper Limb ◽  
Healthy Adult ◽  
Handgrip Strength ◽  
Hand Function ◽  
Hand Grip Strength ◽  
Adult Women ◽  
Hand Functions ◽  
Hand Grip ◽  
And Function

Background Breast cancer related upper limb lymphedema (BCRL) is a common complication in post-mastectomy patients. It is known to cause upper limb disability, which subsequently may affect the grip strength and hand function. There is little evidence on the objective assessment of functional activities particularly hand function in women with BCRL. Therefore, this study objectively assesses the handgrip strength and hand functions in women with BCRL. Method A cross-sectional study design was conducted on a sample of women with (n = 31) and without (n = 31) BCRL. The Handgrip strength and hand functions were measured using a dynamometer and Jebsen-Taylor hand function test, respectively. Results The results showed a significantly reduced handgrip strength in women with BCRL as compared to age-matched healthy adult women for both right and left hands (p < 0.05). Similarly, hand functions were significantly impaired in women with BCRL as compared to healthy adult women (p < 0.05). Reduction in handgrip strength and hand function in women with BCRL were clinically meaningful as indicated by moderate to large effect sizes (Cohen’s d = 0.61 to 0.99 and 0.54 to 3.02, respectively) in all outcomes except power handgrip strength in left hand (Cohen’s d = 0.38). Conclusion The results of this study indicate a significant reduction of hand grip strength and hand function in women with BCRL. Our findings suggest that objective measures of grip strength and function be included in the assessment of women with BCRL to better guide clinical decision making and patient care, which may include management of impairment associated with hand strength and function. Future studies that evaluate hand grip strength and function in a larger sample which includes a more diverse age group of women with BCRL are warranted to confirm the current findings.

scholarly journals Combination of the G-8 Screening Tool and Hand-Grip Strength to Predict Long-Term Overall Survival in Non-Small Cell Lung Cancer Patients Undergoing Stereotactic Body Radiotherapy

Cancers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 3363
Author(s):  
Kristian Kirkelund Bentsen ◽  
Olfred Hansen ◽  
Jesper Ryg ◽  
Ann-Kristine Weber Giger ◽  
Stefan Starup Jeppesen
Keyword(s):  
Overall Survival ◽  
Grip Strength ◽  
Cancer Patients ◽  
Stereotactic Body Radiotherapy ◽  
Statistical Significance ◽  
Multivariable Analysis ◽  
Hand Grip Strength ◽  
Physical Test ◽  
Hand Grip

The Geriatric 8 (G-8) is a known predictor of overall survival (OS) in older cancer patients, but is mainly based on nutritional aspects. This study aimed to assess if the G-8 combined with a hand-grip strength test (HGST) in patients with NSCLC treated with stereotactic body radiotherapy can predict long-term OS better than the G-8 alone. A total of 46 SBRT-treated patients with NSCLC of stage T1-T2N0M0 were included. Patients were divided into three groups: fit (normal G-8 and HGST), vulnerable (abnormal G-8 or HGST), or frail (abnormal G-8 and HGST). Statistically significant differences were found in 4-year OS between the fit, vulnerable, and frail groups (70% vs. 46% vs. 25%, p = 0.04), as well as between the normal and abnormal G-8 groups (69% vs. 39%, p = 0.02). In a multivariable analysis of OS, being vulnerable with a hazard ratio (HR) of 2.03 or frail with an HR of 3.80 indicated poorer OS, but this did not reach statistical significance. This study suggests that there might be a benefit of adding a physical test to the G-8 for more precisely predicting overall survival in SBRT-treated patients with localized NSCLC. However, this should be confirmed in a larger study population.

Clinical Outcomes After Aggressive Active Early Motion and Modified Kleinert Regimens: Comparison of 2 Consecutive Cohorts

Hand ◽  
2021 ◽  
pp. 155894472110172
Author(s):  
Kaisa Jokinen ◽  
Arja Häkkinen ◽  
Toni Luokkala ◽  
Teemu Karjalainen
Keyword(s):  
Quality Of Life ◽  
Range Of Motion ◽  
Grip Strength ◽  
Clinical Outcomes ◽  
Flexor Tendon ◽  
Hand Grip Strength ◽  
Active Motion ◽  
Hand Grip ◽  
Active Range Of Motion

Background Modern multistrand repairs can withstand forces present in active flexion exercises, and this may improve the outcomes of flexor tendon repairs. We developed a simple home-based exercise regimen with free wrist and intrinsic minus splint aimed at facilitating the gliding of the flexor tendons and compared the outcomes with the modified Kleinert regimen used previously in the same institution. Methods We searched the hospital database to identify flexor tendon repair performed before and after the new regimen was implemented and invited all patients to participate. The primary outcome was total active range of motion, and secondary outcomes were Disabilities of Arm, Shoulder, and Hand; grip strength; globally perceived function; and the quality of life. Results The active range of motion was comparable between the groups (mean difference = 14; 95% confidence interval [CI], −8 to 36; P = .22). Disabilities of Arm, Shoulder, and Hand; grip strength; global perceived function; and health-related quality of life were also comparable between the groups. There was 1 (5.3%) rupture in the modified Kleinert group and 4 (15.4%) in the early active motion group (relative risk = 0.3; 95% CI, 0.04-2.5; P = .3). Conclusions Increasing active gliding with a free wrist and intrinsic minus splint did not improve the clinical outcomes after flexor tendon injury at a mean of 38-month follow-up.

scholarly journals Gender Differences in Neuromuscular, Haematological and Urinary Responses during Padel Matches

2021 ◽  
Vol 18 (11) ◽  
pp. 5864
Author(s):  
Francisco Pradas ◽  
Alejandro García-Giménez ◽  
Víctor Toro-Román ◽  
Nicolae Ochiana ◽  
Carlos Castellar
Keyword(s):  
Gender Differences ◽  
Red Blood Cells ◽  
Grip Strength ◽  
Blood Cells ◽  
Temporal Structure ◽  
Hand Grip Strength ◽  
Squat Jump ◽  
Hand Grip ◽  
Before And After ◽  
High Level

Research on the acute physiological response to a padel match is limited. The present study aimed to: (a) evaluate neuromuscular, urinary, and hematological responses after simulated padel competition (SC) and (b) analyze possible gender differences. In this study, 28 high-level padel players participated (men = 13, age = 26.83 ± 6.57 years; women = 15, age = 30.07 ± 4.36 years). The following parameters were analyzed before and after SC: neuromuscular (hand grip strength, squat jump (SJ), countermovement jump (CMJ), and Abalakov jump (ABK)), hematological (red blood cells, hemoglobin, and hematocrit), and urinary (pH, specific gravity, microalbuminuria, and red blood cells). Significant gender differences were found in neuromuscular and hematological responses, with men obtaining higher values (p < 0.05). For the SC influence, changes were noted in ABK and microalbuminuria (p < 0.05). The percentages of change in hand grip strength, SJ (height and watts), CMJ (height), and ABK (height) were higher for men than women (p < 0.05). SC negatively influenced the neuromuscular parameters to a greater extent in women. Our results could be related to gender differences in game actions, the temporal structure, and anthropometric and physiological characteristics. Game dynamics and a different organic response between male and female padel playing were confirmed.

Association between Sleep Duration and Hand Grip Strength among COPD Patients

2021 ◽  
pp. 019394592110286
Author(s):  
Cui Wang ◽  
Mengqi Wang ◽  
Jieru Chen ◽  
Limin Wang ◽  
Shaomei Shang
Keyword(s):  
Grip Strength ◽  
Sleep Duration ◽  
Health Care Providers ◽  
Hand Grip Strength ◽  
Chronic Obstructive ◽  
Care Providers ◽  
Linear Regression Models ◽  
Night Time ◽  
Hand Grip ◽  
Copd Patients

This study aimed to evaluate the association between night-time sleep duration and hand grip strength (HGS) among patients with chronic obstructive pulmonary disease (COPD). Participants aged ≥45 years were included in a nationally representative investigation clinical study in 2015. HGS was measured using dynamometers. The data on night-time sleep duration, sociodemographic information, and health-related variables were systematically collected. For analysis, sleep duration was categorized as <5 h, 5–7 h, 7 h, 7–9 h, and >9 h. Multivariable linear regression models were used to determine the possible association between the night-time sleep duration and HGS. Our results indicated that the shortest (<5 h) or the longest sleep duration (>9 h) was relevant to high risk of weaker HGS in females. In males, the shortest (<5 h) sleep duration was correlated to lower HGS. Thus, our findings clearly suggest that health care providers should focus on the potential influence of sleep duration on HGS among COPD patients.

scholarly journals Effects of the association between APOE rs405509 polymorphisms and gene-environment interactions on hand grip strength among middle-aged and elderly people in a rural population in southern China

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Haoyu He ◽  
Huaxiang Lu ◽  
Shuzhen Liu ◽  
Jiansheng Cai ◽  
Xu Tang ◽  
...  
Keyword(s):  
Grip Strength ◽  
Elderly People ◽  
Rural Population ◽  
Southern China ◽  
Hand Grip Strength ◽  
Environment Interaction ◽  
Middle Aged ◽  
Hand Grip ◽  
Gene Environment ◽  
Significant Gene

Abstract Background Hand grip strength is a complex phenotype. The current study aimed to identify the effects of the association between APOE rs405509 polymorphisms and gene-environment interactions on hand grip strength among middle-aged and elderly people in a rural population in Gongcheng, southern China. Methods APOE rs405509 polymorphisms in 1724 participants (695 men and 1029 women, aged 45–97 years old) were genotyped using the Sequenom MassARRAY platform. Statistical analysis was conducted using SPSS 21.0 and Plink 1.90. Results The APOE rs405509 G allele was associated with lower hand grip strength in all participants (β = −1.04, P value <0.001), and the correlation seemed to be even stronger among women. A significant gene-environment interaction was observed between APOE rs405509 and smoking, especially in men. The hand grip strength of male smokers carrying the GG genotype was significantly higher than that of nonsmokers (P value = 0.004). Conclusions APOE rs405509 polymorphisms might be genetic factors that affect hand grip strength in a rural population in Gongcheng, southern China. The APOE rs405509-smoking interaction has an impact on hand grip strength.

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