scholarly journals Upper Limb Isokinetic Muscle Strength Predicts the Performance in Cross-Country Sit-Skiing

2021 ◽  
Author(s):  
Chenglin Liu ◽  
Yuan Tian ◽  
Longfeng Zhou ◽  
Zhulin Tian ◽  
Gang Sun ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Upper Limb ◽  
Endurance Performance ◽  
Limb Muscle ◽  
Power Performance ◽  
System A ◽  
Isokinetic Muscle Strength ◽  
Double Poling ◽  
Shoulder Strength ◽  
Cross Country

Abstract Understanding the physical fitness attributes in a sport-specific technical skill is a key to improve the action economy, and thus aerobic endurance performance. The present study was designed to investigate how upper limb muscle strength predicts double poling (DP) power performance in cross-country sit-skiing. A total of 19 female able-bodied college students (age 23.2±0.8 years, BMI 20.4±2.2) were subjected to a 30-s and 3-min DP performance tests using a sit-skiing ergometer. Isokinetic muscle strength by the angular velocity of 30 °/second, 60 °/second, and 120 °/second of the shoulder and elbow extensor/flexor were measured with an ISOMED2000 isokinetic system. A medium correlation was found between DP output power and isokinetic upper limb muscle strength (shoulder strength at all speed, r = 0.39-0.74, p < 0.1). Multiple regressions, which were employed to predict power production in the 30-s and 3-min tests, showed that shoulder extension strength at 60 °/second accounted for 34% of the variation in the 30-s test, and 40% of the variance in the 3-min test.

Association of the Type I Collagen alpha1 Sp1 Polymorphism, Bone Density and Upper Limb Muscle Strength in Community-Dwelling Elderly Men

2001 ◽  
Vol 12 (10) ◽  
pp. 895-901 ◽  
Author(s):  
I. Van Pottelbergh ◽  
S. Goemaere ◽  
L. Nuytinck ◽  
A. De Paepe ◽  
J. M. Kaufman
Keyword(s):  
Bone Density ◽  
Muscle Strength ◽  
Upper Limb ◽  
Type I Collagen ◽  
Community Dwelling ◽  
Type I ◽  
Limb Muscle ◽  
Elderly Men

scholarly journals Quality of life after mastectomy and its relation with muscle strength of upper limb

2014 ◽  
Vol 21 (2) ◽  
pp. 180-185 ◽  
Author(s):  
Suelen Helena da Silva ◽  
Lydia Christmann Espindola Koetz ◽  
Eduardo Sehnem ◽  
Magali Teresinha Quevedo Grave
Keyword(s):  
Quality Of Life ◽  
Muscle Strength ◽  
Global Health ◽  
Upper Limb ◽  
Functional Performance ◽  
Life Quality ◽  
Radical Mastectomy ◽  
Limb Muscle ◽  
Eortc Qlq

This research transversal, analytical, exploratory and quantitative approach aimed to identify the quality of life of women who have had a mastectomy surgery, relate the results with the strength of the upper limb muscle affected and draw a sociofunctional profile. A total of 10 women participated, from 30 to 60 years old, who underwent to unilateral modified radical mastectomy in a medium-sized hospital in an inner city of Rio Grande do Sul, for at least one year from the date of data collection. The strength of the upper limb muscle was evaluated by manual testing and the handgrip was tested with the dynamometer. A sociofunctional questionnaire was applied and the quality of life data were collected through the European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30 questionnaire, followed by the module BR-23. The strength had decreased in all muscle groups homolateral to the surgery. The life quality in a global health bases resulted as regular. The main changes found in the functionality were at scales: emotional, cognitive and sexual. Statistically, it was found significance and correlation between physical health and social function (p=0.04; r=0.65), cognition and functional performance (p=0.01; r=0.75), emotional performance and cognition (p=0.005; r=0.9) and between handgrip of the affected limb with the global health (p=0.008; r=0.77). Breast cancer and mastectomy has a direct impact on the upper limb muscle strength, functionality and on life quality of women, in sexual, cognitive and emotional domains, and physiotherapy plays an important role in the rehabilitation and in social rehabilitation of these.

Design and analysis of EMG system for measuring upper limb muscle strength

2020 ◽  
Author(s):  
Farah M. M. Akram ◽  
Zulkhairi Mohd Yusof ◽  
Md Masum Billah
Keyword(s):  
Muscle Strength ◽  
Upper Limb ◽  
Limb Muscle

The effectiveness of stretch–shortening cycling in upper-limb extensor muscles during elite cross-country skiing with the double-poling technique

2013 ◽  
Vol 23 (6) ◽  
pp. 1512-1519 ◽  
Author(s):  
Chiara Zoppirolli ◽  
Hans-Christer Holmberg ◽  
Barbara Pellegrini ◽  
Diego Quaglia ◽  
Lorenzo Bortolan ◽  
...  
Keyword(s):  
Upper Limb ◽  
Extensor Muscles ◽  
Double Poling ◽  
Cross Country Skiing ◽  
Cross Country ◽  
Poling Technique

scholarly journals A Significant Association of Upper Limb Muscle Strength with Thyroid Function in Overweight and Obese Population: A Study of the Sixth Korea National Health and Nutrition Examination Survey (KNHANES 2014-2015)

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Jeongmin Lee ◽  
Kwanhoon Jo ◽  
Jeonghoon Ha ◽  
Dong-Jun Lim ◽  
Jung Min Lee ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Thyroid Function ◽  
Upper Limb ◽  
National Health ◽  
Nutrition Examination Survey ◽  
Limb Muscle ◽  
Cerebral Disease ◽  
Representative Data ◽  
Health And Nutrition ◽  
Obese Population

Background. As skeletal muscle is one of main targets of thyroid hormone signalling, an association of thyroid function and muscle strength could be expected. The aim of study is to evaluate the association of free thyroxine (FT4) and thyrotropin (TSH) with upper limb muscle strength, measured by hand grip strength, in subjects with normal FT4 from national representative data. The study utilized the sixth edition of the Korea National Health and Nutrition Examination Survey. After exclusion of subjects with FT4 level out of normal range, a history of thyroid disease or cerebral disease, restricted activity, and incomplete data, a total of 3503 were recruited (age range 19–80 years, 51% male). FT4 positively correlated with upper limb muscle strength (β coefficient = −12.84, p < 0.001 ), while TSH did negatively (β coefficient = −0.37, p = 0.002 ). After adjusting for confounding factors, statistical significance disappeared. However, among subjects with BMI above 23 kg/m2, a negative correlation of TSH with upper limb muscle strength was found in a younger age group (19–39 years old) (β coefficient = −0.56, p = 0.021 ), while FT4 positively correlated with upper limb muscle strength (β coefficient = 3.24, p = 0.019 ) in an older group (above 40 years old). In overweight and obese subjects, a significant association of thyroid function with upper limb muscle strength was observed in nation-wide representative data. High TSH in a younger group and low FT4 in an older group could be risk factors for decreased upper limb muscle strength in obese population.

Sign in / Sign up

Export Citation Format

Share Document