scholarly journals The Impact of Aging and Hand Dominance on the Passive Wrist Stiffness of Squash Players: Pilot Study

10.2196/11670 ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. e11670
Author(s):  
Taya Hamilton ◽  
Stan Durand ◽  
Hermano Igo Krebs
Keyword(s):  
Pilot Study ◽  
Hand Dominance ◽  
The Impact ◽  
Wrist Stiffness

scholarly journals The Impact of Aging and Hand Dominance on the Passive Wrist Stiffness of Squash Players: Pilot Study (Preprint)

2018 ◽  
Author(s):  
Taya Hamilton ◽  
Stan Durand ◽  
Hermano Igo Krebs
Keyword(s):  
Pilot Study ◽  
Upper Limb ◽  
Joint Stiffness ◽  
Estimation Methods ◽  
Dominant Male ◽  
Passive Joint ◽  
Average Ratio ◽  
Significant Difference ◽  
The Impact ◽  
Wrist Stiffness

BACKGROUND Passive joint stiffness can influence the risk of injury and the ability to participate in sports and activities of daily living. However, little is known about how passive joint stiffness changes over time with intensive repetitive exercise, particularly when performing unilateral activities using the dominant upper limb. OBJECTIVE This study aimed to investigate the difference in passive wrist quasi-stiffness between the dominant and nondominant upper limb of competitive squash players, compare these results with a previous study on young unskilled subjects, and explore the impact of aging on wrist stiffness. METHODS A total of 7 healthy, right-side dominant male competitive squash players were recruited and examined using the Massachusetts Institute of Technology Wrist-Robot. Subjects were aged between 24 and 72 years (mean 43.7, SD 16.57) and had a mean of 20.6 years of squash playing experience (range 10-53 years, SD 13.85). Torque and displacement data were processed and applied to 2 different estimation methods, the fitting ellipse and the multiple regression method, to obtain wrist stiffness magnitude and orientation. RESULTS Young squash players (mean 30.75, SD 8.06 years) demonstrated a stiffer dominant wrist, with an average ratio of 1.51, compared with an average ratio of 1.18 in young unskilled subjects. The older squash players (mean 64.67, SD 6.35 years) revealed an average ratio of 0.86 (ie, the nondominant wrist was stiffer than the dominant wrist). There was a statistically significant difference between the magnitude of passive quasi-stiffness between the dominant and nondominant wrist of the young and older squash player groups (P=.004). CONCLUSIONS Findings from this pilot study are novel and contribute to our understanding of the likely long-term effect of highly intensive, unilateral sports on wrist quasi-stiffness and the aging process: adults who participate in repetitive sporting exercise may experience greater joint quasi-stiffness when they are younger than 45 years and more flexibility when they are older than 60 years.

Pilot Study: The Impact of Yoga on Health

2007 ◽  
Author(s):  
Danielle V. Shelov ◽  
Sonia Suchday ◽  
Jennifer P. Friedberg
Keyword(s):  
Pilot Study ◽  
The Impact

The Impact of Motivation Enhancing-CBT Program on Suicide Prevention among Suicide Attempters : A Pilot Study

2017 ◽  
Vol 45 (4) ◽  
pp. 139-165
Author(s):  
Ho-Yup Kang ◽  
Hyun-Joo Lee
Keyword(s):  
Pilot Study ◽  
Suicide Prevention ◽  
Suicide Attempters ◽  
The Impact

The impact of oral hormonal contraception on metformin action on hypothalamic‐pituitary‐thyroid axis activity in women with diabetes and prediabetes: A pilot study

2020 ◽  
Vol 45 (5) ◽  
pp. 937-945 ◽  
Author(s):  
Robert Krysiak ◽  
Karolina Kowalcze ◽  
Monika Wolnowska ◽  
Bogusław Okopień
Keyword(s):  
Pilot Study ◽  
Hormonal Contraception ◽  
Pituitary Thyroid Axis ◽  
Thyroid Axis ◽  
The Impact

scholarly journals Natural Infection of Dairy Cows with Bovine Leukemia Virus Affects Immunoglobulin Levels in Saliva and Serum but Not Milk

Pathogens ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 907
Author(s):  
Monika Dziuba ◽  
Vickie J. Ruggiero ◽  
Catherine Wilson ◽  
Paul C. Bartlett ◽  
Paul M. Coussens
Keyword(s):  
Pilot Study ◽  
Dairy Cows ◽  
Bovine Leukemia Virus ◽  
Leukemia Virus ◽  
Natural Infection ◽  
Total Serum ◽  
Serum Samples ◽  
Retroviral Infection ◽  
Serum Iga ◽  
The Impact

Bovine leukemia virus (BLV) is a retroviral infection that disrupts the immune function of infected animals. It is widespread among U.S. dairy cattle. In this pilot study, the average total IgA and IgM concentrations in milk, saliva, and serum samples from BLV ELISA-positive (ELISA+) dairy cows were compared against samples from BLV ELISA-negative (ELISA−) cows using the Kruskal–Wallis test (with ties). The results from ELISA+ cows were also stratified by lymphocyte count (LC) and proviral load (PVL). In milk and saliva from ELISA+ cows, the average total IgA and IgM concentrations were decreased compared to ELISA− cows, although this was only statistically significant for saliva IgM in cows with low PVL (p = 0.0424). Numerically, the average total IgA concentrations were 33.6% lower in milk and 23.7% lower in saliva, and the average total IgM concentrations were 42.4% lower in milk and 15.5% lower in saliva. No significant differences were observed in the total serum IgA concentrations, regardless of PVL and LC. The total serum IgM from ELISA+ cows was significantly decreased (p = 0.0223), with the largest decreases occurring in the highest PVL and LC subgroups. This pilot study is a first step in investigating the impact of BLV on mucosal immunity and will require further exploration in each of the various stages of disease progression.

Bariatric Embolization: Pilot Study on the Impact of Gastroprotective Agents and Arterial Distribution on Ulceration Risk and Efficacy in a Porcine Model

2016 ◽  
Vol 27 (12) ◽  
pp. 1923-1928 ◽  
Author(s):  
Ben E. Paxton ◽  
Aravind Arepally ◽  
Christopher L. Alley ◽  
Charles Y. Kim
Keyword(s):  
Pilot Study ◽  
Porcine Model ◽  
The Impact ◽  
Bariatric Embolization
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