scholarly journals THE PECULIARITIES OF THE BODY’S EXTERNAL STRUCTURE AND INDICATORS OF CENTRAL HEMODYNAMICS OF VOLLEYBALL PLAYERS OF DIFFERENT POSITIONS

2020 ◽  
Vol 73 (5) ◽  
pp. 920-924
Author(s):  
Larisa A. Sarafinjuk ◽  
Olga P. Khapitska ◽  
Larysa Ya. Fedoniuk ◽  
Lyudmila V. Fomina ◽  
Daria A. Merkulova ◽  
...  
Keyword(s):  
Peripheral Resistance ◽  
The Body ◽  
Control Group ◽  
Central Hemodynamics ◽  
Anthropometric Parameters ◽  
External Structure ◽  
Impact Index ◽  
Volleyball Players ◽  
High Level ◽  
The Impact

The aim was to determine the main differences in the external structure of the body and the of central hemodynamics parameters in of high-level sports skills volleyball players of the juvenile age with the role of libero, hitters and setters. Materials and methods: 116 volleyball players of high level athletic skill of the youth age from 16 to 20 years old. The control group included 140 practically healthy girls who were not engaged in sports of the corresponding age. Anthropometric investigation was performed according to Bunak’s V.V. and Martirosov’s E.G. method, rheographic – according to the method of Ronkin M.A. and Ivanov L.B. The reliability of the difference between independent quantitative values was determined using Mann–Whitney U-test. Results: It was established that volleyball players have significantly higher total, longitudinal, circumferential dimensions of the body, width of distal epiphyses, transverse diameters of the chest and pelvis in comparison with girls, who are not involved in sport. According to the most parameters of the body external structure the hitters are predominate than setters and libero. In hitters and setters, most anthropo-somatotypological parameters are larger than in nonathletes. The stroke and minute volumes, the impact index, the volume velocity of the blood and the capacity of the left ventricle in volleyball players are significantly higher. Specific peripheral resistance is significantly lower than that of girls who are not involved in sports. Between the volleyball players of different positions in the value of the central hemodynamics parameters, there were no significant differences, except for the impact index, which is significantly higher in libero than in the hitters. Conclusions: The external structure of the body, anthropometric parameters and indicators of central hemodynamics depend of volleyball player’s position and have some peculiarities.

scholarly journals The characteristic of the component body composition of athletes involved in game-based and cyclic kinds of sports

2021 ◽  
Vol 11 (2) ◽  
pp. 45-51
Author(s):  
S. V. Gudimov ◽  
A. N. Shkrebko ◽  
I. A. Osetrov ◽  
I. E. Pleshcheev ◽  
M. A. Kuznetsov
Keyword(s):  
Body Composition ◽  
Physical Training ◽  
Female Athletes ◽  
Cell Mass ◽  
The Body ◽  
Anthropometric Measurements ◽  
Control Group ◽  
Anthropometric Parameters ◽  
Volleyball Players ◽  
Body Weight Index

Objective: to determine a component body composition of students specializing in volleyball and athletics and to conduct a comparative analysis of the results.Materials and methods: the study was conducted at the Department of physical training and sports at the Yaroslavl State Medical University of the Ministry of Health of the Russian Federation. The study included students from different groups of physical training: volleyball (10 men and 10 women), athletics (10 women) (experimental groups), and first­year students that attended physical training classes (14 men and 16 women) (control group).Results: significant differences were revealed between the anthropometric measurements in the experimental groups of the studied women and between the results of anthropometric measurements in the female volleyball players, female athletes, and students from the control group. Significant differences were revealed in the component body composition of the studied women from the experimental and control groups. The analysis of the results of anthropometric measurements in the experimental and control groups of men did not reveal any significant differences between the parameters. Bioimpedancemetry revealed significant differences in the composition of the internal milieu of volleyball players in comparison with the control group.Conclusions: 1. differences were revealed in the component composition of the body of female athletes involved in game­based and cyclic kinds of sport as well as in the parameters of bio­impedance of female volleyball players and the control group. Female volleyball players had higher parameters of total body fluids, intracellular and extracellular fluids, fat­free, fat, and active cell mass in comparison with female light athletes and the control group. The differences in the obtained results were more significant in the experimental groups. 2. Bio­impendance analysis of men showed significant differences in the component body composition of volleyball players in comparison with untrained students. The parameters of total body fluids, fat­free, fat, and active cell mass in sportsmen exceeded the same parameters in the control group. 3. Differences were established in the anthropometric parameters depending on the sport­oriented specialization of female students. Female volleyball players had higher values of mass, length, body weight index, and body surface area, the circumferences of the pelvis, thighs, and wrists in comparison with the results obtained in female light athletes. Similar differences were revealed in the anthropometric parameters of female volleyball players and students from the control group. Significantly lower values of the body weight index, circumference of the chest and pelvis of female athletes were registered in comparison with students from the control group. Male volleyball players did not have significant differences in the anthropometric parameters. They tended to have an increase in the body mass, length and surface area of the body, circumference of the chest, thighs, and wrists.

scholarly journals Features of total body sizes and anthropometric torso sizes in female volleyball players of mesomorphic somatotype

2018 ◽  
Vol 24 (3) ◽  
pp. 32-36 ◽  
Author(s):  
L.A. Sarafinyuk ◽  
L.V. Fomina ◽  
V.O. Khavtur ◽  
L.Ia. Fedoniuk ◽  
O.P. Khapitska ◽  
...  
Keyword(s):  
Young Women ◽  
The Body ◽  
Research Center ◽  
Anthropometric Parameters ◽  
Constitutional Type ◽  
Volleyball Players ◽  
Body Sizes ◽  
Total Body ◽  
High Level ◽  
Medical University

Determination of constitutional parameters that are inherent in highly skilled athletes of a particular sport can serve as reliable predictive markers during sport selection. But the last time an indisputable fact is the somatotypological conditionality of individual sizes that characterize the external structure of the body, and the visceral structures of the organism. The purpose of the work is to establish differences in the anthropometric dimensions between young women volleyball players of high level of athletic skill and non-sports young women belonging to the mesomorphic somatotype. On the base of the research center of the National Pirogov Memorial Medical University, we conducted an anthropo-somatotypological study of 127 female volleyball players of youth age (from 16 to 20 years) with a high level of athletic skill. Sports experience in all cases was greater than 3 years. From the database of research center of the National Pirogov Memorial Medical University was selected 140 practically healthy young women of the same age who were not engaged in sports. Anthropometric measurements were carried out using the method of V.V. Bunak (1941), somatotypological research – according to the estimated modification of the Heath-Carter method (1990). After the conducted somatotyping, it was found that 29 volleyball players and 33 non-sports young women belonged to the mesomorphic type of constitution. The analysis of the obtained results is carried out in the licensed package of Statistica 5.5 using nonparametric methods of evaluation of indicators. In the volleyball players of the mesomorphic somatotype, compared to young women who are not engaged in sports of the same constitutional type, we have found a significantly larger length of the body, the mass and area of the body surface, the height of the suprasternal, pubic, shoulder anthropometric points, chest cords, transverse mid and lower chest and sagittal middle-thigh diameters, intervertebral distance of the pelvis and its external conjugates. Relatively smaller in female volleyball players of mesomorphic type of physique was the thickness of the skin-fat folds under the shoulder blade. One can conclude that within the same somatotype there are significant changes in the anthropometric parameters, in particular total body and longitudinal, transverse, front and rear body dimensions, which is affected by the body of modern young women volleyball players with mesomorphic somatotype, under the influence of intensive loads.

scholarly journals Somatotypological features of acrobat girls in different periods of ontogenesis

2018 ◽  
pp. 43-47
Author(s):  
L. A. Sarafinyuk ◽  
O. P. Khapitska ◽  
Yu. I. Yakusheva ◽  
A. O. Ivanytsia ◽  
P. V. Sarafinyuk
Keyword(s):  
The Body ◽  
Professional Activity ◽  
Control Group ◽  
Sports Activity ◽  
Sports Skills ◽  
Biological Maturity ◽  
High Level ◽  
Distinct Features ◽  
The Impact ◽  
Competitive Activities

The somatotypological characteristic of acrobats in the literature is insufficiently disclosed, especially from the position of the role of sports selection, training and competitive activities in the formation of somatotype in athletes, whose professional activity is marked by coordination, rhythm and artistic movements, and the early onset of the impact of intense physical activity on their body. The purpose of the work is to establish the peculiarities of the components of the somatotype of acrobats with a high level of sportsmanship of prepubertal, pubertal and postpubertal age. We conducted a survey of 122 girls acrobats of high-level sports skills. As a control group, 126 girls were examined, who were not engaged in sports and studied in schools of Vinnytsia. The girls’ passport age was between 8 and 21 years old. In order to determine the biological age, we used the scheme Avtandilov G. G. (1990). The examined girls were divided into three groups according to the degree of biological maturity: prepubertal period (36 acrobats and 39 girls of the control group); puberty period (31 acrobats and 35 girls of the control group); postpubertal period (55 acrobats and 59 girls of the control group). The somatotypological study was performed according to the estimated modification of the Heath-Carters method (1990). The analysis of the obtained results was carried out in the licensed package “Statistica 5.5” using parametric methods of estimation of indicators. It was found that in the prepubertal period of the ontogenesis in the acrobat and in the girls who were not engaged in sports, the group somatotype was ecto-mesomorphic. In this period, the fatty component of the somatotype in acrobats was significantly lower, and mesomorphic - significantly higher than that of non-sports girls. In the puberty period, the somatotype in control and acrobats had distinct features of the ecto-mesomorphic type. It was found that acrobats in this period had a greater linearity of the body, as evidenced by the significantly higher values of their ectomorphic component of the somatotype. In addition, the size of the endomorphic component was significantly lower in athletes than in the control group. In the postpubertal period of ontogenesis, the F- and L-components were not significantly different, unlike in the previous period, which was characterized by intense puberty development. Acrobats only showed a significant predominance of the mesomorphic component of the somatotype. It can be concluded that the peculiarities of acrobatic sports activity in prepubertal, puberty and postpubertal age have the most significant effect on the development of the fatty and muscular components of the somatotype.

Influence of DAFS-25+polizon composition on blood and functional state of liver of steers at fattening

2020 ◽  
pp. 15-18
Author(s):  
Inna R. Kilmetova ◽  
◽  
Igor A. Rodin ◽  
Nazira I. Khayrullina ◽  
Nikolay G. Fenchenko ◽  
...  
Keyword(s):  
Functional State ◽  
White Blood Cells ◽  
Live Weight ◽  
The Body ◽  
Farm Animals ◽  
Control Group ◽  
Standard Diet ◽  
The Impact ◽  
Experimental Group ◽  
Stimulation Of

Summary. The disbalanced feeding and the uneven distribution of micro- and macroelements in the environment leads to a trace element, in particular hypomelanosis. To accelerate the growth and preservation of young farm animals include in the diet of various biological additives and drugs, which include selenium. For stimulation of weight gain in the livestock industry, as well as for the prevention and treatment of pathological processes in addition to micro - and macrouse amino acids, primarily methionine. The aim of this work was to study the influence of composition of DAFS-25+Polizon on morpho-biochemical parameters of blood and functional state of the liver in fattening bulls of black-motley breed in the conditions of the Republic of Bashkortostan. Experiments using were conducted on bull-calves of black-motley breed of the properties in the properties age from 6 to 15 months. The first experimental group during the experiment was additionally given the composition of DAFS-25+Polizon at a dose of 2 mg/kg, the animals of the control group received a standard diet. To assess the impact of the composition DAFS-25+Polizon on metabolism cattle studied morphological and biochemical indicators of blood and conducted histological examination of the liver. It is established that the use of the composition of DAFS-25+Polizon at a dose of 2 mg/kg increases the number of erythrocytes and hemoglobin in the experimental group and reduces the amount of white blood cells. The serum content of total protein, phosphorus and calcium increases in the group of experimental animals. Microscopic examination of the liver revealed no changes in the structure of the organ and hepatocytes in the experimental group, whereas in the control group hemodynamic disorders and dystrophic changes in liver cells were observed. Thus, the use of the composition DAFS-25+Polizon at a dose of 2 mg/kg of live weight in fattening bulls black-and-white breed contributes to the increase of redox processes in the body, stimulation of metabolism, prevent the development of liver disorders of cellular mechanisms of metabolism, optimizes the structure of the liver, which generally provides higher productivity.

IDENTIFICATION AND ASSESSMENT OF RISK FACTORS ROLE IN MYOCARDIAL INFARCTION DEVELOPMENT

2019 ◽  
Vol 72 (5) ◽  
pp. 779-783
Author(s):  
Victor A. Ognev ◽  
Anna A. Podpriadova ◽  
Anna V. Lisova
Keyword(s):  
Risk Factors ◽  
Myocardial Infarction ◽  
Cardiovascular Disease ◽  
Cardiovascular System ◽  
Control Group ◽  
Biological Factors ◽  
Prevention And Treatment ◽  
High Level ◽  
Social Importance ◽  
The Impact

Introduction:The high level of morbidity and mortality from cardiovascular disease is largely due toinsufficient influence on the main risk factors that contribute to the development of myocardial infarction.Therefore, a detailed study and assessment of risk factors is among the most important problems of medical and social importance. The aim: To study and evaluate the impact of biological, social and hygienic, social and economic, psychological, natural and climatic risk factors on the development of myocardial infarction. Materials and methods: A sociological survey was conducted in 500 people aged 34 to 85. They were divided into two groups. The main group consisted of 310 patients with myocardial infarction. The control group consisted of 190 practically healthy people, identical by age, gender and other parameters, without diseases of the cardiovascular system. Results: It was defined that 30 factors have a significant impact on the development of myocardial infarction.Data analysis revealed that the leading risk factors for myocardial infarction were biological and socio-hygienic. The main biological factors were: hypertension and hypercholesterolemia. The man socio-hygienic factor was smoking. Conclusions: Identification of risk factors provides new opportunities for the development of more effective approaches for the prevention and treatment of myocardial infarction.

scholarly journals The Association of Obesity and Liver Enzyme Activities in a Student Population at Increased Risk for Cardiovascular Disease / Veza Između Gojaznosti I Aktivnosti Jetrenih Enzima U Studentskoj Populaciji Sa Povećanim Rizikom Za Nastanak Kardiovaskularnih Bolesti

2013 ◽  
Vol 32 (1) ◽  
pp. 26-31 ◽  
Author(s):  
Emina Čolak ◽  
Dragana Pap ◽  
Nada Majkić-Singh ◽  
Ivana Obradović
Keyword(s):  
Body Mass Index ◽  
Waist Circumference ◽  
Liver Enzyme ◽  
Body Mass ◽  
Statistical Processing ◽  
The Body ◽  
Control Group ◽  
Anthropometric Parameters ◽  
Nonalcoholic Fatty Liver ◽  
Increased Risk

Summary Background: It has been reported that obesity is associated with metabolic syndrome, insulin resistance, cardiovascular risk but also with nonalcoholic fatty liver disease (NAFLD). The prevalence of obesity in children and adolescents is increasing rapidly all over the world. The aim of this study was to analyze the value of liver enzymes: AST, ALT and γGT in a group of obese students in order to establish their correlation to anthropometric parameters such as: BMI (body mass index), WC (waist circumference), HC (hip circumference), and WHR (waist-to-hip ratio) compared to non-obese students who comprised the control group (CG). Methods: In this study, 238 students from the University of Novi Sad of both sexes (126 men and 112 women) with a mean age of 22.32 ± 1.85 years were included. According to the body mass index (BMI) lower and higher than 25 kg/m2 and waist circumference (WC) lower and higher than 94 cm (80 cm for females) the whole group of 238 students was divided into 2 subgroups: the obese group at increased risk for CVD (Group 1) and the group at lower risk for CVD (Group 2). AST, ALT and γGT activities were determined in fasting blood samples. Results: Statistical processing data revealed significantly higher values of AST, ALT and γGT in the group of students with BMI>25 kg/m2, WC>94 cm for males and WC>80 cm for females, HC>108 cm for males and HC>111 cm for females, and WHR>0.90 for males and WHR>0.80 for females (P<0.001). Significant association was established between anthropometric parameters and liver enzyme levels (P<0.0001). Conclusions: Obese students with higher BMI, WC, HC and WHR values have higher liver enzyme activites and a higher chance to develop NAFLD in the future.

Making Up 3D Bodies

2021 ◽  
Vol 4 (2) ◽  
pp. 1-9
Author(s):  
Kiona Hagen Niehaus ◽  
Rebecca Fiebrink
Keyword(s):  
Software Tool ◽  
The Body ◽  
Design Parameters ◽  
Artistic Practice ◽  
Human Form ◽  
Modeling Systems ◽  
Exploratory Approach ◽  
Disability Status ◽  
High Level ◽  
The Impact

This paper describes the process of developing a software tool for digital artistic exploration of 3D human figures. Previously available software for modeling mesh-based 3D human figures restricts user output based on normative assumptions about the form that a body might take, particularly in terms of gender, race, and disability status, which are reinforced by ubiquitous use of range-limited sliders mapped to singular high-level design parameters. CreatorCustom, the software prototype created during this research, is designed to foreground an exploratory approach to modeling 3D human bodies, treating the digital body as a sculptural landscape rather than a presupposed form for rote technical representation. Building on prior research into serendipity in Human-Computer Interaction and 3D modeling systems for users at various levels of proficiency, among other areas, this research comprises two qualitative studies and investigation of the impact on the first author's artistic practice. Study 1 uses interviews and practice sessions to explore the practices of six queer artists working with the body and the language, materials, and actions they use in their practice; these then informed the design of the software tool. Study 2 investigates the usability, creativity support, and bodily implications of the software when used by thirteen artists in a workshop. These studies reveal the importance of exploration and unexpectedness in artistic practice, and a desire for experimental digital approaches to the human form.

EFFECT OF CARBON MONOXIDE ON THE RATE OF EXCRETION OF ETHANOL BY KIDNEYS

2021 ◽  
pp. 15-21
Author(s):  
Beschasnyi S.P. ◽  
Lysenko E.M. ◽  
Hasiuk O.M. ◽  
Erlish О.О.
Keyword(s):  
Carbon Monoxide ◽  
The Body ◽  
Gas Liquid Chromatography ◽  
Older Individuals ◽  
Chromatography Method ◽  
Co Intoxication ◽  
Blood And Urine Samples ◽  
Liquid Chromatography Method ◽  
High Level ◽  
The Impact

Carbon monoxide is a toxic gas that is colourless, odourless, and has the potential to cause momentaryhypoxia by bonding with heme-inspired proteins. Because of these properties, it causes the highest number of toxications. Due to its properties, this gas causes damage to the nervous and cardiovascular system. The development of anoxia is associated with the impact on the system of oxidative phosphorylation in mitochondria and the development of oxidative stress in the body. The body produces a small amount of carbon monoxide as a result of erythrocyte breakdown. Picomolar concentrations of carbon monoxide even have anti-inflammatory, antiapoptotic,cytoprotective and antiproliferative properties. Kidney is one of the first organs,that responds to the occurrence of hypoxia, are responsible for the removal of products of metabolism and toxicants, including ethanol. For the study, the blood and urine samples were taken from patients with acute intoxication. The amount of methemoglobin in the blood was determined by spectrophotometric method. The concentration of ethanol in blood and urine was measured by gas-liquid chromatography method. The correlation analysis showed that carbon monoxide affects the rate of excretion of ethanol from the body. Among individuals under 40 years of age, there was a correlation between the level of carbon monoxide and the amount of ethanol in the blood. Among older adults this correlation was not established. A direct correlation with the level of this gas in the blood and the level of ethanol in the urine among people under 40 years of age was found. Among older individuals, the opposite was observed –a high level of methemoglobin was responsible for the decreased level of ethanol. There were no correlations between methemoglobin level and age. Comparison of the studied indices did not show any sexual differences in ethanol excretion, but there were age specific features: ethanol excretion under the influence of carbon monoxide among people under 40 years old was more accelerated.Key words:hypoxia, CO intoxication, blood, methemoglobin, kidneys. Монооксид карбону являє собою токсичний газ, який не має кольору,без запаху та здатен спричиняти миттєву гіпоксію шляхом зв’язування з гем-вмісними білками. Через такі властивості він спричиняє найбільшу кількість отруєнь. Цей газ,завдяки своїм властивостям,спричиняє ураження нервової та серцево-судинної системи. Розвиток аноксії пов’язаний із впливом на систему окисного фосфорилювання у мітохондріях та розвиткомоксидативного стресу. В організмі продукується невелика кількість ендогенного монооксиду карбону внаслідок розпаду еритроцитів. Пікомолярні концентрації монооксиду карбону навіть володіють протизапальними, антиапоптичними, цитопротекторними та антипроліферативними властивостями. Нирки є одним із перших органів, який реагує на розвитокгіпоксії, вони відповідають за видалення продуктів метаболізму й токсикантів, зокрема етанолу.Зміни у функціонуванні нирок відображаються на загальному стані організму.Для дослідження отримували зразки крові та сечі від осіб із гострою інтоксикацією. У крові спектрофотометричним методом визначали вміст метгемоглобіну, який утворювався внаслідок вдихання монооксиду карбону та відповідного потрапляння до кровоносної системи. Методом газово-рідинної хроматографії вимірювали концентрацію етанолу у крові та сечі. Розрахунок кореляційних зв’язків показав, що монооксид карбону впливає на швидкість екскреції етанолу. У осіб до 40 років спостерігалася кореляція між показником рівня метгемоглобінута вмістом етанолу у крові. У осіб старшого віку цього зв’язку не встановлено. Виявлено прямий зв’язок із рівнем цього газу у крові та рівнем етанолу в сечі у осіб до 40 років. У осіб старшого віку спостерігалася зворотня реакція–високий рівень метгемоглобінуобумовлював зниження рівня етанолу. Кореляційні зв’язки між вмістом метгемоглобіну та віком не було виявлено. Порівняння досліджуваних показників не виявило статевих відмінностей у екскреції етанолу, проте виявлено вікові особливості: екскреція етанолу в умовах впливу монооксиду карбону в осіб до 40 років була більш пришвидшена.Таким чином, можна стверджувати, що монооксид карбону обумовлює зміни у функціональній активності нирок.Ключові слова:гіпоксія, інтоксикація СО, кров, метгемоглобін, нирки.

scholarly journals CHANGES OF PSYCHO-EMOTIONAL STATE IN THE INFERTILE PREGNANT FEMALES DUE TO THE ANAMNESIS AND IVF

2019 ◽  
Vol 72 (4) ◽  
pp. 562-567
Author(s):  
Volodymyr K. Likhachov ◽  
Yanina V. Shymanska ◽  
Yulia S. Savelieva ◽  
Viktoriya L. Vashchenko ◽  
Ludmyla М. Dobrovolska
Keyword(s):  
Pregnant Women ◽  
Art Therapy ◽  
Emotional State ◽  
Healthy Woman ◽  
The Body ◽  
Control Group ◽  
Emotional States ◽  
Psychological Component ◽  
Group I ◽  
High Level

Introduction: During pregnancy in the body of a healthy woman there are physiological and psychological changes that contribute to the bearing a child and prepare the female for future labour and motherhood. In women who experience failure at the stage of fertilization or during pregnancy, as a result of prolonged negative emotional states, psycho-emotional stress develops. The aim of the research was to study the psycho-emotional state of women with infertility in history, whose pregnancy resulted from extracorporal fertilization (IVF), and to develop methods for reducing their anxiety. Materials and methods: At the first stage, the initial psycho-emotional state of 60 women in the second trimester, whose pregnancy resulted from IVF (Group I), was studied; the control group consisted of 20 healthy women with a physiological course of pregnancy (Group II). At the second stage, 10 art therapy exercises with a requestioning of pregnant women from Group I were conducted for improving their psycho-emotional state. Results: Women of Group I had a high level of both situational anxiety (SA) and the personal one (PA). The prevalent type of the psychological component of gestational dominant was anxiety and euphoric types (58.3%). In one third of women with burdened gynecological history examined mild or masked depression was diagnosed. 43 pregnant women from Group I used a method of psychocorrection – art therapy, which included colouring “antistress” pictures of perinatal topic, making flowers from paper and creating a collage of dreams. Conclusions: After the art therapy course, a high level of SA (from 46.5% to 7.0%) and OA (from 48.8% to 32.6%) decreased, the index of the optimal type of the psychological component of gestational dominant increased from 25.6% to 53.5%. The number of women without depression increased from 62.8% to 93%.

scholarly journals 262 Heat stress alleviation and dynamic temperature measurement for growing beef cattle

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 192-193
Author(s):  
Sheyenne M Augenstein ◽  
Meredith A Harrison ◽  
Sarah C Klopatek ◽  
James W Oltjen
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Beef Cattle ◽  
Ambient Temperature ◽  
The Body ◽  
Control Group ◽  
Temperature Threshold ◽  
Sprinkler Systems ◽  
Significant Difference ◽  
The Impact

Abstract Heat stress continues to be a challenge for feedlot producers, forcing physiological adaptations in beef cattle that can have a negative impact on gain and carcass quality. Feedlots may want to incorporate systems that aid in mitigating heat stress, including sprinkler systems, which are commonly found on dairies. The objective of this study was to determine the impact of sprinkler systems on the body temperature of growing feedlot steers applied at three different temperature thresholds. Thirty-two Angus-cross beef steers (298 ± 15 SD days of age) were randomly assigned to 8 pens. Treatments were assigned to pens according to location to avoid drainage issues, with one replicate located on the eastern side of the feedlot and the other replicate located on the western side. Treatments including no sprinklers (C), high temperature threshold sprinklers (HT), moderate temperature threshold sprinklers (MT) or low temperature threshold sprinklers (LT). Sprinklers (flow rate: 5.11 L/min) were activated at 33°C (HT), 28°C (MT), and 23°C (LT) for five minutes at corresponding temperatures every thirty minutes for 57 days. Rectal temperature of steers in their pens was measured in the morning (0800 h), afternoon (1500 h), and evening (1900 h) three days each week (Monday, Wednesday, Friday) for a total of 19 experimental days. Weather measurements, including ambient temperature, windspeed, humidity and solar radiation were recorded at each measurement time along with the maximum values for each day. The change in body temperature (ΔBT) between the morning and afternoon was affected by ambient temperature (P &lt; 0.01); MT (P = 0.02) and LT (P = 0.02) – different than C. There was no significant difference between sprinkler treatments and the control group (P &gt; 0.05). Day affected (ΔBT) between the morning and afternoon (P &lt; 0.05) and the afternoon and evening (P &lt; 0.05). When averaged by day, the control group was significantly higher than MT (P = 0.04) between the morning and afternoon. The control group was also significantly higher than LT between the morning and afternoon (P = 0.03) and the afternoon and evening (P &lt; 0.01). The change in steer body temperature between afternoon and morning was affected by ambient temperature, and averaged across days, lowering the temperature threshold for sprinkling decreased in the afternoon and evening body temperature increase in steers.

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