scholarly journals Influence of a nine-day alpine ski training programme on the postural stability of people with different levels of skills

2016 ◽  
Vol 8 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Michał Staniszewski ◽  
Przemysław Zybko ◽  
Ida Wiszomirska
Keyword(s):  
Ankle Joint ◽  
Postural Stability ◽  
Training Programme ◽  
The Body ◽  
Training Camp ◽  
Alpine Skiers ◽  
The Stability ◽  
Induced Changes ◽  
Positive Effect ◽  
Different Levels

SummaryStudy aim: In alpine skiing, balance is one of the key elements that determine the effectiveness of the ride. Because of ski boots, the foot and ankle joint complex is excluded from the process of maintaining the stability of the body. The aim of the study was to determine to what extent a few days of skiing activities and the level of technical skills affect the skiers’ level of postural stability. Material and methods: The study involved 10 beginner (20.7 ± 1.1 years, 76.4 ± 8.7 kg, 184.4 ± 6.1 cm) and 10 advanced (20.5 ± 0.5 years, 80.5 ± 13.7 kg, 184.5 ± 9.5 cm) skiers, who participated in a nine-day ski training camp. Measurements of the postural stability were taken on the first and last days of the camp, on an AccuSway (AMTI, USA) stabilometric platform. Results: In both groups, a significant (p < 0.05) improvement in stability was observed after the training camp only while standing in ski boots. While standing on two feet, the participants were more stable barefoot (p < 0.05), and when standing on one foot they were more stable in the ski boot trial (p < 0.05). Conclusions: Skiing had a positive effect on the postural stability only in measurement conditions that were similar to those in which this stability was practiced, i.e. in measurements involving ski boots. The restriction of mobility within the ankle joint significantly influenced the training-induced changes in the postural stability of both beginner and advanced alpine skiers.

Postural stability in one leg standing on dominant and non-dominant leg in professional soccer players

2017 ◽  
Vol 26 (77) ◽  
pp. 53-64 ◽  
Author(s):  
Przemysław Dębski ◽  
Jacek Mielańczyk ◽  
Rafał Gnat
Keyword(s):  
Postural Stability ◽  
Football Player ◽  
The Body ◽  
Lower Limbs ◽  
Soccer Players ◽  
Balance System ◽  
Professional Soccer ◽  
Sport Competition ◽  
Significant Difference ◽  
The Stability

Stability plays a key role in the sport competition in football. Synchronized operation stabilization of the lower limb and trunk of the support with the dynamic movement of the contralateral limbs allow you to perform tasks specific to the discipline, eg. variety kicking of the ball. Purpose. The aim of the study was to evaluate differences in the capabilities to maintain postural stability in standing on one leg dominant and non-dominant leg with professional players including grouping variables: age, height, weight, volume of training aimed at improving the stability and general internship of football player career. Although commonly assumed that the non-dominant leg is predisposed to act more effective support for the body, the work to date have failed to identify indicated differentiation. It should be noted, however, that they were carried out on small trials in people less active, or among amateur athletes. Basic procedures. The study involved 31 professional soccer players from 1 to 5 level of division. In order to assess postural stability, each of the test performed three times a standard stability test consisting of three 20-second attempt to maintain balance on one leg becoming dominant and non-dominant leg on stabilometric platform BIODEX Balance System. For each of the lower limbs test was repeated three times. Assessment were average angular range deflections platform in the two reference planes, and the volatility of these deflections. These parameters were treated as a measure of postural stability of the respondents. Main findings. In the whole group of patients, no statistically significant differences in the possibilities to maintain postural stability in standing on one leg dominant and non-dominant leg. No significant differences were also detected when considering grouping variables. Conclusions. The results do not indicate a significant difference in the ability to maintain postural stability in standing on one leg dominant and non-dominant leg in professional soccer players.

scholarly journals Effects of Core Stability Exercises, Lumbar Lordosis and Low-Back Pain: A Systematic Review

2021 ◽  
Vol 5 (1) ◽  
pp. 17-23
Author(s):  
Gojko Skundric ◽  
◽  
Veljko Vukicevic ◽  
Nikola Lukic ◽  
◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Lower Back Pain ◽  
Lumbar Lordosis ◽  
The Body ◽  
Core Stability ◽  
Low Back ◽  
Lower Back ◽  
The Stability ◽  
Positive Effect

Core stability has a very positive effect on the prevention of lumbar lordosis and lower back pain. The main focus of this paper was on a review of the available literature on the influence of trunk stability on lower back pain and lumbar lordosis. The two electronic databases researched for collecting articles are PubMed and ScienceDirect. A search was conducted by title, taking a predefined combination of the following keywords into account: low back pain, core stability, training, sports. Screening processes are summarized through a PRISMA flow chart. 408 studies were identified, of which 20 met the inclusion criteria. It was concluded that exercise on the stability of the pelvic nucleus and muscles is recommended as the simplest and most favorable prevention of lower back pain and lumbar lordosis. The stability of the nucleus helps to overcome the main causes and deprive the body of functional disorders and pain.

scholarly journals Pedalling Technique and Postural Stability During Incremental Cycling Exercise – Relationship with Cyclist FMSTM Score

2016 ◽  
Vol 7 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Indrek Rannama ◽  
Kirsti Pedak ◽  
Karmen Reinpõld ◽  
Kristjan Port
Keyword(s):  
Postural Stability ◽  
Horizontal Plane ◽  
Reaction Force ◽  
The Body ◽  
Functional Movement Screen ◽  
Cycling Exercise ◽  
Functional Movement ◽  
Competitive Cyclists ◽  
Reaction Forces ◽  
The Stability

Abstract Purpose of the present study was to examine the changes in the pedalling kinetics and in the ground reaction forces as a measure of the cycling stability during an incremental cycling exercise. Furthermore, we compared the effectiveness of the pedalling technique and postural stability between the high and low Functional Movement Screen score (FMSTM) cyclists and analysed the relationships between the cycling specific postural stability, pedalling kinetics and cyclists FMSTM test scores. 31 competitive cyclists (18.5±2.1y; 1.81±0.06m; 73.7±7.5kg) were categorized based on the (FMSTM) test results in a low (LS, n=19; FMS≤14) and a high (HS, n=12; FMS>14) score group. The pedalling effectiveness and absolute symmetry indexes, as well the ground reaction force (GRF) were measured during incremental cycling exercise. Cycling specific postural stability was expressed as the body mass corrected standard deviation of 3 linear and 3 angular GRF components during a 30sec cycling at four power levels. We found that during incremental cycling exercise the pedalling effectiveness, smoothness and cyclist’s swaying in all three planes increased according to the combined effect of the workload and fatigue. Cyclists with high FMSTM score showed a lower bilateral pedalling asymmetry and a greater cycling specific postural stability, but showed no differences in the pedalling effectiveness and smoothness compared with the LS cyclists. Cyclist’s FMSTM score were moderately related with the stability components acting along the horizontal plane. The pedalling effectiveness, smoothness and bilateral asymmetry were inversely related to the components acting perpendicularly to the horizontal plane.

Stability Limits in Extreme Postures: Effects of Load Positioning and Foot Placement

1995 ◽  
Vol 39 (10) ◽  
pp. 655-659 ◽  
Author(s):  
M.A. Holbein ◽  
D.B. Chaffin
Keyword(s):  
External Load ◽  
Postural Stability ◽  
Center Of Gravity ◽  
The Body ◽  
Functional Stability ◽  
Foot Placement ◽  
The Stability ◽  
Stability Issues ◽  
Stability Limits ◽  
Stability Modeling

Although injuries related to postural stability are prevalent, ergonomic job analyses have traditionally not addressed stability issues. In this research, functional stability limits are quantified for persons standing in extreme postures under various external load and foot positioning conditions. Six subjects were tested while standing unladen and while holding a 5.2 kg load. The foot positions, or bases of support (BOS), were varied in width of the stance and sagittal separation of the feet. They were asked to lean and displace their center of gravity (COG) as far as possible in eight directions to the sides and front of the body. Stability measures based on these COG displacements were calculated. All controlled variables significantly affected the stability measures. When standing unladen, subjects extended their COG to within 99% of their BOS limit. Movement was much more restricted when leaning while handling a load (89%), especially holding it with one hand on the shoulder (84%). On average, increased separation of the feet in a particular direction resulted in larger COG displacements in that direction. The results are discussed relative to their effects on balance and stability modeling.

scholarly journals Development of beverage technology for athletes with the addition of whey proteins

2020 ◽  
Vol 22 (94) ◽  
pp. 61-65
Author(s):  
O. Krasulya
Keyword(s):  
Whey Proteins ◽  
Viscosity Index ◽  
Experimental Studies ◽  
Component Composition ◽  
The Body ◽  
Theoretical Research ◽  
Whey Protein Concentrate ◽  
Model Sample ◽  
The Stability ◽  
Positive Effect

The article substantiates the relevance of developing a new drink technology for sports nutrition. The combination of milk base has an obvious positive effect on the body and enrichment with the necessary plant components. According to the formula of balanced nutrition of athletes engaged in strength sports, the daily amount of necessary macronutrients was calculated. The aim of the work was to develop a milk drink with nutrients. Their content in a portion of 500 g will cover the daily requirement by more than 10 %. Taking into account theoretical research, the component composition of the drink for athletes is substantiated. The expediency of adding whey protein concentrate obtained by ultrafiltration has been proved. According to the results of experimental studies of the dynamic viscosity index, a rational amount and type of carbohydrate component in the beverage has been established. With the addition of maltodextrin in the amount of 8 %, a viscous-fluid consistency of the model sample is observed. Тhe recommended limit on the amount of carbohydrates in beverages for athletes, namely an average of 10…12 %, taking into account the lactose content in milk-based about 4.0…4.5 %. The addition of soybean oil to the composition of the drink recipe for athletes is justified. A rational amount of lecithin emulsifier has been established to ensure the stability of the emulsion of the finished product. The composition of the milk drink recipe for athletes is given, which additionally includes a multivitamin premix, creatine monohydrate, dry extract of safflower leaflet, flavoring. The calculation of the nutritional and energy value of the developed drink was performed and the assessment of the satisfaction of the daily requirement for minerals and vitamins when drinking the drink in the amount of 500 g (1 serving) was performed. Consumption of the developed drink by the athlete who is engaged in power sports, in the amount of 500 g per day will provide the body with the necessary nutrients by more than 10 %.

Penicillamine-induced changes in elastic tissue of the upper respiratory tract

1993 ◽  
Vol 107 (1) ◽  
pp. 62-64 ◽  
Author(s):  
M. Babu Manohar ◽  
D. A. R. Boldy ◽  
R. L. Bryan ◽  
K. Pearman
Keyword(s):  
Respiratory Tract ◽  
Term Treatment ◽  
The Body ◽  
Elastic Tissue ◽  
Upper Respiratory Tract ◽  
Elastic Fibres ◽  
Long Term Treatment ◽  
Upper Respiratory ◽  
The Stability ◽  
Induced Changes

AbstractWe describe a patient who developed upper respiratory tract symptoms following long-term treatment of Wilson's disease with penicillamine. These symptoms were attributed to areas of pharyngeal thickening and were treated with a laser. Histological examination of the lesions showed proliferations of abnormal elastic fibres similar to those previously described at other sites, especially the skin, in patients receiving penicillamine. This drug impairs the maturation and reduces the stability of elastic fibres and although elastic tissue throughout the body is affected, we are aware of no previous reports of penicillamine- induced changes presenting with upper respiratory tract symptoms.

Implications of Person Fluctuation for the Stability and Validity of Test Scores

Methodology ◽  
2006 ◽  
Vol 2 (4) ◽  
pp. 142-148 ◽  
Author(s):  
Pere J. Ferrando
Keyword(s):  
Item Response ◽  
Test Scores ◽  
Temporal Stability ◽  
Person Fit ◽  
Item Parameters ◽  
Individual Trait ◽  
The Stability ◽  
The Individual ◽  
Different Levels ◽  
Fluctuation Model

In the IRT person-fluctuation model, the individual trait levels fluctuate within a single test administration whereas the items have fixed locations. This article studies the relations between the person and item parameters of this model and two central properties of item and test scores: temporal stability and external validity. For temporal stability, formulas are derived for predicting and interpreting item response changes in a test-retest situation on the basis of the individual fluctuations. As for validity, formulas are derived for obtaining disattenuated estimates and for predicting changes in validity in groups with different levels of fluctuation. These latter formulas are related to previous research in the person-fit domain. The results obtained and the relations discussed are illustrated with an empirical example.

THE CHARACTERISTICS OF ARTIFICIAL RICE WITH SEAWEED Eucheuma cottonii ADDITION AS A DIETARY FIBER SOURCE

2014 ◽  
Vol 6 (1) ◽  
Author(s):  
Natalia Prodiana Setiawati ◽  
Joko Santoso ◽  
Sri Purwaningsih
Keyword(s):  
Blood Glucose ◽  
Dietary Fiber ◽  
Dietary Fibre ◽  
Extrusion Process ◽  
The Body ◽  
Starch Digestibility ◽  
Food Commodities ◽  
The Stability ◽  
Extrusion Technology ◽  
Eucheuma Cottonii

The utilization of local food commodities such as corn and cassava with seaweed addition as a dietary fiber source for producing artificial rice through extrusion technology is an  alternative for food diversification. The research was carried out to find out the best composition (rice, corn, cassava, and seaweed) and temperature of extrusion process on making artificial rice and the influence of dietary fibre on sensory properties and physicochemical. The composition of rice, corn, and cassava in proportion  of 1:3:1 with 20% seaweed, Eucheuma cottonii, addition and temperature extruder of 90 °C were selected as the best product for artificial rice. The  sensory evaluation was 8.02±0.21 (people’s preference). In physicochemical properties, dietary fiber significantly affected on low bulk density and starch digestibility. This condition is very good for health especially in maintaining the stability of blood glucose in the body. Keywords: artificial rice, composition, extrusion, seaweed, dietary fibre, temperature

Substantiation the machine with a basket for the application of mineral fertilizers and other bulk materials with the upper arrangement of the feeding device

2019 ◽  
pp. 37-43
Author(s):  
Fesenko, H.
Keyword(s):  
Fat Body ◽  
Mineral Fertilizer ◽  
The Body ◽  
Mineral Fertilizers ◽  
Analytical Mechanics ◽  
Bulk Materials ◽  
The Stability ◽  
Working Bodies ◽  
The Relationship ◽  
Stable Flow

Purpose. Increasing the uniformity of distribution of mineral fertilizers and other bulk materials due to the stability of their feed from the body to the spreading working bodies using the top feeder. Methods. The following methods are used to achieve this aim: the method of comparing the differences between individual groups of fertilizers, the method of analyzing the properties of a new technical system, the method of functional inventiveness, and the methods of theoretical and analytical mechanics. Results. The traction body of the conveyor of the upper feed of the body fat body machine for mineral fertilizers and other bulk materials was substantiated and the relationship between the height of its scrapers and the distance between them was established, as well as the nature of the mineral fertilizer pressure on the curvilinear wall of the body. In addition, the design of the advanced body fertilizer spreader is justified, which ensures a stable flow of fertilizers from the body due to the improvement of the top feeder. Conclusions. Because of the conducted researches, the advantages of machines equipped with top feeder are found. They create the conditions for the forced feeding mineral fertilizers and other loose materials from the container to the distribution bodies, which is a prerequisite for their evenness on the surface. With this, the imperfection of known machines with the top feeder constrains their introduction into agricultural production. On this account, a more thoroughly constructed solution of the body feeder of the top feed is substantiated, in which the conveyor provides a stable supply of fertilizers from the body with reduced energy consumption during operation. Keywords: analysis, feed, upper device, conveyor, stability, fertilizers, flow ability, body.

Novel Nanolipoidal Systems for the Management of Skin Cancer

2020 ◽  
Vol 14 (2) ◽  
pp. 108-125
Author(s):  
Apoorva Singh ◽  
Nimisha
Keyword(s):  
Skin Cancer ◽  
Survival Rates ◽  
Cancer Therapeutics ◽  
The Body ◽  
Surgical Removal ◽  
The Novel ◽  
Skin Cancers ◽  
Recent Developments ◽  
Abnormal Cells ◽  
The Stability

: Skin cancer, among the various kinds of cancers, is a type that emerges from skin due to the growth of abnormal cells. These cells are capable of spreading and invading the other parts of the body. The occurrence of non-melanoma and melanoma, which are the major types of skin cancers, has increased over the past decades. Exposure to ultraviolet radiations (UV) is the main associative cause of skin cancer. UV exposure can inactivate tumor suppressor genes while activating various oncogenes. The conventional techniques like surgical removal, chemotherapy and radiation therapy lack the potential for targeting cancer cells and harm the normal cells. However, the novel therapeutics show promising improvements in the effectiveness of treatment, survival rates and better quality of life for patients. Different methodologies are involved in the skin cancer therapeutics for delivering the active ingredients to the target sites. Nano carriers are very efficient as they have the ability to improve the stability of drugs and further enhance their penetration into the tumor cells. The recent developments and research in nanotechnology have entitled several targeting and therapeutic agents to be incorporated into nanoparticles for an enhancive treatment of skin cancer. To protect the research works in the field of nanolipoidal systems various patents have been introduced. Some of the patents acknowledge responsive liposomes for specific targeting, nanocarriers for the delivery or co-delivery of chemotherapeutics, nucleic acids as well as photosensitizers. Further recent patents on the novel delivery systems have also been included here.

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