scholarly journals THE CONDITIONS FOR TRANSITING TO THE STAGE OF PERFORMANCE ENHANCEMENT IN 14–15-YEAR OLD WRESTLERS

2020 ◽  
Vol 19 (S2) ◽  
pp. 88-95
Author(s):  
N Suslov ◽  
V Mishustin ◽  
N Sentiabrev
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Motor Coordination ◽  
Performance Enhancement ◽  
Age Groups ◽  
Growth Spurt ◽  
Recording Device ◽  
Training Process ◽  
Young Males ◽  
General Growth

Aim. The purpose of the article is searching for conditions in the training process for forming a permanent part of motor coordination typical for a competitive technique during the growth spurt. Materials and methods. Body length and body weight were measured in 2 groups of young males on an annual basis. The first group consisted of non-athletes (n = 18), the second group comprised of young weightlifters (n = 18). The examination was conducted in the following age groups: from 10 to 13 years and from 14 to 16 years. Body composition was assessed through the Matejko method. Special fitness was measured by the barbell velocity during the lift established with the help of the photoelectron device based on a transmitter (optical quantum generator), a photodetector, and a recording device. Using the correlation between the factual and model values of minimum fixation speed the efficiency of motor coordination was assessed in the range of 60–100% of barbell weight. These correlations were also used for establishing a limiting character of technique and strength. Results. The analysis of body weight during the annual cycle showed the change in weight categories. This reflected athletes’ weight gain while preserving their qualification. An earlier increase in general growth in young weightlifters has been established, which confirms the advisability of early specialization. It was found that when performing a jerk, the minimum fixation speed of the barbell increases with increasing body length. The insufficiency of this indicator compared to qualified athletes is compensated by an increase in the importance of the muscle factor, which reduces the reliability of motor actions. A training technique is proposed aimed at a more effective implementation of motor skills and a decrease in the barbell speed based on pedagogical instruction and information on the barbell speed. This resulted in a statistically significant (t = 2.89; p < 0.05) increase in the number of successful barbell lifts. Conclusion. When doing weightlifting, it is necessary to stimulate general growth and the growth of muscle mass with training loads being a leading factor in sports results. The training process combined with pedagogical instruction forms a stable motor skill and a reasonable transition to the stage of performance enhancement.

Prediction of body weights of Nellore sheep under field condition

2015 ◽  
Author(s):  
M. Rani ◽  
B. Ekambaram ◽  
B. Punya Kumari
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Age Groups ◽  
The Body ◽  
Coefficient Of Determination ◽  
Regression Equations ◽  
Body Weights ◽  
Chest Girth ◽  
Males And Females ◽  
Nellore Sheep

Data on 1350 Nellore sheep of 2, 4, 6 and 8-teeth age, reared under field conditions in 12 mandals of Chittoor district of Andhra Pradesh were utilized for development of prediction equations and study the phenotypic association among body measurements and body weights. The coefficients of correlation between body weight with the height at withers, chest girth, paunch girth, hip width and body length were positive and high in magnitude in both males and females in majority of the age groups studied. Step-down regression equations were fitted to predict the body weight based on biometrical measurements at different ages. The height at withers, chest girth, paunch girth, hip width and body length have contributed significantly to the expression of body weights at the majority of the ages studied. High coefficient of determination (R2) value was observed in males at 6 and 8-teeth age as 88 per cent, while in females 50 per cent at 2-teeth age.

Phenotypic characterization of Purky sheep population of Kargil district

2016 ◽  
Author(s):  
D. Chakraborty ◽  
K. Mehdi Khan ◽  
N. Kumar ◽  
Isfaq Faried ◽  
Rajan Sharma ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Age Groups ◽  
Phenotypic Characterization ◽  
Body Measurements ◽  
Sheep Population ◽  
Phenotypic Correlations ◽  
Chest Girth ◽  
Very High

Majority of the Kargil sheep populations are indigenous. Very scanty information is available for morphological characterization of Purky sheep population. Therefore, the present study was undertaken with the objectives to study the morpho-metric characteristics and body measurements for phenotypic characterization of the local sheep. A stratified random sample survey was conducted on various parameters (horn size, tail size, chest girth, punch girth, body length, height at wither and body weight) in seven different age groups. Data were collected randomly from 510 sheep of either sex. The local sheep population of Kargil which was selected for the present investigation is named as ‘Purky’ by the name of the community that reared this breed. In Purky sheep white body colour was predominant in both the sexes. The sheep breed was of low to medium body weight. The chest girth, punch girth, height at withers of Purky sheep showed it to be medium sized. Sex had significant effect (P is less than 0.05) on height at wither only. For males the least squares means were higher for all the traits of all age groups baring few exceptions. The phenotypic correlations of age groups with different morpho-metric traits were very high. The phenotypic correlations of body weight with other body measurements like tail size, chest girth, paunch girth, body length and height at wither were very high. Further studies should be carried out to fully exploit their genetic potential and to register the breed and in-situ conservation of this population.

scholarly journals ASIATIC SMELT OSMERUS DENTEX STEINDACHNER ET KNER, 1870 OF THE UDA RIVER (NORTHWESTERN OKHOTSK SEA) — BIOLOGY, ECOLOGY, FISHERY

2019 ◽  
Vol 199 ◽  
pp. 83-97
Author(s):  
V. P. Ovsyannikov ◽  
A. Yu. Nemchenko ◽  
A. N. Kanzeparova
Keyword(s):  
Body Weight ◽  
Body Length ◽  
River Flow ◽  
Age Groups ◽  
River Mouth ◽  
The Body ◽  
Spawning Migration ◽  
Spawning Grounds ◽  
Absolute Fecundity ◽  
The Individual

Data on biology, ecology and fishery of asiatic smelt in the Uda River during its spawning migration are analyzed. The spawning begins in May-June in 2–11 km from the river mouth and lasts 3–10 days. Timing of its start varies from May 22 (2014 and 2018) to June 14 (2001), with 24 days difference. The spawning migration begins under the water temperature 6.0 оС, during the spawning the temperature varies from 6.2 to 11.9 оС. The river flow velocity on the spawning grounds is 1.2–2.6 m/s, the river depth varies from 0.3 to 2.5 m. Age of the spawners is 2–8 years, their length is 11.5–32.0 cm and weight 10.8–275.0 g, males usually prevail in number (63–81 %). Depending on the year-class strength, the fish in age of 3 or 4 years prevail among the spawners. After spawning, females leave the spawning grounds immediately — in that time their occurrence in the catches below the spawning grounds can reach 85 %. Size of the spawners decreases during the migration, for males the decreasing was from 19.0 to 15.0 cm in 2007, from 20.2 to 18.8 cm in 2014, from 19.3 to 16.6 cm in 2015, and from 19.4 to 16.0 cm in 2016, for females — from 21.0 to 18.0 cm in 2007, from 22.1 to 19.6 cm in 2014, from 21.3 to 19.0 cm in 2015, and from 24.5 to 16.1 cm in 2016. Annual increments of the smelt body length are 0.7–7.8 cm, on average 3.9 cm, for the body weight 17.1–39.9 g, on average 32.1 g. The minimum registered size of mature male and female was 11.5 and 13.0 cm, respectively. Percentage of the smelt with non-commercial size during spawning migration was 19.2 % in 2007, 0.4 % in 2014, 15.4 % in 2015, and 28.4 % in 2016. The group linear growth of asiatic smelt could be approximated by Bertalanffy equation: L = 30.5 [1 – e–0.317 (t – 0.533)]. Its body length dependence on weight is described by the equation of simple allometry: W = 0.002 L3.380 (determination r 2 = 0.92–0.99). The body weight depends on age as the function: Wt = 2.974t 2.136. Individual absolute fecundity of the smelt in the Uda varies from 11300 to 141300 eggs, on average 52500 eggs in 2016 and 50400 eggs in 2007; these values are close to the smelt fecundity in the Ulbeya and Inya rivers. The fecundity variation generally increases with the age: the registered ranges of absolute fecundity (thousand eggs) were, by age groups: 19.1 for 3 years, 53.5 for 4 years, 37.8 for 5 years, 57.5 for 6 years, and 60.3 for 7 years old fish, the ranges of relative fecundity (eggs/g of body weight) were: 864, 537, 565, 501, and 449 eggs/g for the same age groups. The total population fecundity was 32.7. 109 eggs in 2016. The individual absolute fecundity has the following dependencies on body length, weight, and age: AF(L) = 0.001 L3.437, AF(W) = 0.650 W0.986, and AF(t) = 1.661 t 2.250, respectively. The stock of asiatic smelt in the Uda is represented by migrating fish only. Its fishery was conducted by 8 companies, their total annual landing increased from 10 t in 2012 to 373 t in 2017 and slightly decreased recently: the mean landing for 2013–2019 was 276 t. The spawning biomass of smelt was estimated from 637 to 1734 t, by years, that was about 70 % of the biomass of mature smelt in the Shantar Sea.

scholarly journals Parameter dynamics of the physical development in children and youth of Volgograd region (Russian Federation) using the percentile method

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Valery V. Yatsyshen ◽  
Tatyana L. Yatsyshena
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Age Groups ◽  
Physical Development ◽  
The Body ◽  
Children And Youth ◽  
School Students ◽  
Study Objective ◽  
Percentile Method ◽  
Volgograd Region

The study objective was to analyze the parameters of physical development (body length and weight) in children and youth 7-17 yo – students of Volgograd region educational institutions over 2012-2016 using the percentile method. Material and methods — We examined 4,367 school students, of which 2,056 and 2,311 were boys and girl, correspondingly. The body lengths and weights were assessed by conventional methods. The results were processed using the programs Statistica 6.0 and MATLAB 7. Results — The values of the body length and weight centiles (3, 10, 25, 50, 75, 90 and 97%) in 7-17 yo girls and boys were computed. It was established that the lowest body length indicators were currently typical for 7 yo boys. Starting at 13 yo, body length indicators in boys were ahead of those for girls. In 15-16 yo girls, growth stabilization was observed, while boys continued growing until the age of 17 yo. All percentile values of body weight in primary school age boys (except for 8 year-olds) were ahead or equivalent to those of girls. At the level of 75-97% in all age groups, the body mass values in boys were ahead of those in girls. At the age of 16-17 yo, all percentile values of body weight in boys were higher than in girls. Harmonious physical development was detected in 69.6% of boys and 61.7% of girls. Conclusion — Percentile analysis of body lengths and weights in children and youth of the Volgograd region facilitated the identification of gender-specific characteristics and assessment of harmonious physical development.

scholarly journals Measures of relationships and association among body weight and biometric traits of donkeys in Northwest Nigeria

2020 ◽  
Vol 46 (1) ◽  
pp. 10-19
Author(s):  
P. A. John ◽  
A. O. Iyiola-Tunji
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Age Groups ◽  
Selection Criterion ◽  
Tail Length ◽  
Neck Circumference ◽  
The Body ◽  
Head Width ◽  
Linear Measurements ◽  
Predicted Body Weight

Body linear measurements of different age categories of donkeys were used to predict the body weight of donkeys using stepwise regression procedure. This work was conducted to estimates the live body weight of donkeys from biometric traits. A total of 700 donkeys were measured into three age groups (weaners 6 months- 1 year, young above 1- 3 years and adults 3 years and above). Morphometric measures taken were body weight, head length, head width, ear length, neck length, neck circumference, shoulder width, height at withers, heart girth, body length and tail length using random sampling technique. Significant variations were observed in morphometric (P<0.05, P<0.01) traits. The results of the study showed that significantly (P<0.01) predicted body weight of these donkeys with good efficiencies were neck circumference (NC), tail length (TL) and body length (BL) were the best predictors of body weight with R2= 100% in weaners, head width (HWD), neck circumference (NL), neck circumference (NC) and height at withers (HW) with R2= 100% in young and HW, HG with R2 = 100% in adult category. The traits were significantly (p<0.05, 0.01) and positively correlated amongst themselves (r=0.09-0.87).It is therefore concluded that the inclusion of two variables improved the prediction marginally, but the addition of further variables gave little further improvement. The association may be useful as selection criterion, since positive correlations of traits suggest that the traits are under the same gene action (pleiotropy/linkage). It is therefore recommended that tail length, neck circumference, body length, height at withers and heart girth should be used as the best predictors of body weight across the sex and age categories of donkeys. 

Correlation Between Body Weight and Linear Body Measurements in Adult Female Sahiwal Cattle

2017 ◽  
Vol 12 (3) ◽  
Author(s):  
A. K. Chaturvedani ◽  
Sambhuti Shankar Sahu ◽  
S. K. Choursia ◽  
Om Prakash
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Adult Female ◽  
Age Groups ◽  
Body Measurements ◽  
Cattle Breeding ◽  
Live Body Weight ◽  
Sahiwal Cattle ◽  
Sahiwal Cows ◽  
Linear Body

The present investigation was conducted in the herd of pure bred Sahiwal cows maintained at Bull Mother Experimental Farm (BMEF) and Government Cattle Breeding Farm (CBF), Anjora, Durg (Chhattisgarh). A total of 193 adult female Sahiwal cattle over three years of age were used in the experiment. The animals were grouped into seven age groups, i.e. 3-4, 4-5, 5-6, 6-7,7-8,>8 years old, and overall. Body weight was found to be significantly (P less than 0.01) and positively correlated with height at withers (r= 0.58 to 0.73), body length (r= 0.56 to 0.76) and heart girth (r= 0.57 to 0.80) in these groups. The relatively high value of coefficient of correlation between live body weight and heart girth assumed to be more significant indicator of live body weight in Sahiwal cattle.

scholarly journals Morphometric Characterization And Relationship Of Body Weight With Linear Body Measurements In Black Bengal Buck

1970 ◽  
Vol 37 (2) ◽  
pp. 8-16 ◽  
Author(s):  
AHMS Sylvia Rahman ◽  
MAMY Khandoker ◽  
SS Husain ◽  
AS Apu ◽  
A Mondal ◽  
...  
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Age Groups ◽  
Tail Length ◽  
The Body ◽  
Body Measurements ◽  
Leg Length ◽  
Highly Correlated ◽  
Relationship Of ◽  
Morphometric Characterization

The present study was conducted at the Artificial Insemination Center, Bangladesh Agricultural University, Mymensingh to record the Black Bengal bucks morphology and to relate body weight with different body measurements. A total of 22 Black Bengal bucks of different ages were taken and were divided into six age groups (0, 3, 6, 9, 12 and 15 months). The body weight of Black Bengal bucks at 0, 3, 6, 9, 12 and 15 months of age were 1.21 ± 0.12, 4.26 ± 0.25, 7.68 ± 0.31, 12.76 ± 0.42, 16.56 ± 0.57 and 21.82 ± 0.70 kg respectively. Age had a significant effect (P<0.05) on heart girth, body length and height at wither (P<0.05) except the measurement of height at wither at 0 and 3 months. The measurement of fore and hind leg length, head length and width, ear length and breadth and also tail length differed significantly (P<0.05) between the age groups. The average scrotal circumferences (SC) were recorded as 4.85 ± 0.22, 10.35 ± 0.39, 15.42 ± 0.34, 18.05 ± 0.24, 19.72 ± 0.33 and 20.83 ± 0.41 cm at 0, 3, 6, 9, 12 and 15 months of age, respectively and differed significantly (P<0.05) with the advancement of age. Animals of the same age group supposed to be similar in conformation. Body weight was highly correlated (P<0.01) with heart girth (0.94), body length (0.95) and height at wither (0.96). DOI: http://dx.doi.org/10.3329/bjas.v37i2.9876 BJAS 2008; 37(2): 8-16

scholarly journals PECULIARITIES OF THE PHYSICAL DEVELOPMENT OF URBAN AND RURAL SCHOOLCHILDREN OF THE IRKUTSK REGION

2018 ◽  
Vol 97 (10) ◽  
pp. 957-961 ◽  
Author(s):  
Inna V. Mylnikova ◽  
N. V. Efimova ◽  
E. A. Tkachuk
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Age Groups ◽  
Large Body ◽  
Growth Curves ◽  
Physical Development ◽  
The Body ◽  
Irkutsk Region ◽  
Development Processes ◽  
Total Body

Introduction. Physical development is one of the informative indices characterizing the health of the child population and reflecting the adverse effects of various environmental factors. Aim. To carry out a comparative assessment of physical development indices both in urban and rural schoolchildren in the Irkutsk region. Material and methods. The total body dimensions were studied. Results. Urban schoolchildren differ from rural peers in large body length indices (p = 0.000) and smaller values of the circumference of the chest (p = 0.002). The body weight of urban and rural boys had similar values, except for the age groups 9 (p=0,000), 12 (p=0,000) and 16 years (p=0,005). Rural schoolgirls outpaced urban peers by their body weight (р=0,016). Some differences from general patterns characteristic for the given period of ontogenesis are revealed: in rural schoolchildren, three crosses of growth curves are established. Correlation ratio of body length indices with other total sizes showed schoolchildren to have signs of desynchronization of physical development processes in different age periods. Discussion. The materials of the study indicate the processes of formation of total body size of rural and urban schoolchildren to differ. An assessment of the correlation ratios of body length parameters with other total sizes showed schoolchildren in different age periods to show signs of desynchronization of physical development processes.

Genetic and Non-Genetic Factors Affecting Post-Weaning Growth and Morphometric Traits in Assam Hill Goat

2019 ◽  
Author(s):  
L. Sarma ◽  
N Nahardeka ◽  
A. Aziz ◽  
N Nahardeka ◽  
R. N. Goswami ◽  
...  
Keyword(s):  
Body Weight ◽  
Genetic Correlation ◽  
Body Length ◽  
Genetic Factors ◽  
Age Groups ◽  
Body Measurements ◽  
Season Of Birth ◽  
Morphometric Traits ◽  
Factors Affecting ◽  
Body Weights

The present work was conducted to evaluate the performance in respect of post-weaning growth and morphometric traits of Assam Hill goat. Data on 960 animals belonging to 3 populations of Assam Hill goat maintained at three field units viz., Batabari, Nahira and Tetelia under All India Coordinated Research Project on Goat Improvement were utilized. The least-squares means for body weight, height at withers, heart girth and body length were 7.557 ± 0.049 kg, 41.231 ± 0.121 cm, 44.621 ± 0.115 cm and 50.778 ± 0.172 cm at 6 months; 9.934 ± 0.044 kg, 43.902 ± 0.120 cm, 48.890 ± 0.099 cm and 55.552 ± 0.170 cm at 9 months and 12.549 ± 0.046 kg, 46.791 ± 0.112 cm, 52.765 ± 0.090 cm and 58.392 ± 0.207 cm at 12 months of age, respectively. Location had significant effect on body weight and height at withers at all age groups; on heart girth at 6, 9 and 12 months and on body length at 6 and 12 months of age. Season of birth exerted significant effect on body weight at 9 and 12 months; on height at withers at 12 months and on body length at 6, 9 and 12 months of age. Significant effect of sex was observed on body weight at 9 and 12 months, on height at withers at 6, 9 and 12 months and on heart girth and body length at 9 and 12 months of age. The heritability estimates for body weight and body measurements were moderate indicating scope of selection. The phenotypic and genetic correlation among body weights and body measurements at 6, 9 and 12 months of age were positive in direction and high in magnitude.

Mandibular Protractions and Their Correlation with Meal Size in Juvenile Thai Snakes During Ingestion of Rodent Prey

2011 ◽  
Vol 4 (1) ◽  
pp. 31-33
Author(s):  
Merel J. Cox ◽  
David Chiszar ◽  
Hobart M. Smith
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Meal Size ◽  
Allometric Growth ◽  
Rodent Prey

Nine neonatal and juvenile snakes, four vipers and five nonvipers, were fed rodent meals varying in size, expressed as percent of snake body weight. The number of mandibular protractions and the time to complete swallowing were recorded, with both measures increasing linearly as a function of meal size. These young snakes routinely swallowed meals that were 50% of body weight, and ranged up to 80%, far higher than meals reported by previous workers studying adult vipers (36.4%) and nonvipers (18.4%). Furthermore, the slopes of regressions relating mandibular protractions to meal size in all of our snakes were lower than comparable slopes for adult vipers or nonvipers. We hypothesized that the relatively long and wide skulls of young snakes (i.e., as proportion of body length) were responsible for these ingestive accomplishments, with negative allometric growth being responsible for performance changes during ontogeny.

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