Printer Friendly

Comparative analysis of the anthropo-motor development level between boys and girls at the selection age in speed skating.

Introduction

In general, the theory and practice of the sport selection process have been psychological and social grounded on the basis of the requests of the aimed sport branches having at the base also the individual particularities through which the difference between individuals is being realized.

The child must not be treated as an adult of smaller dimensions, but differentiated depending on his growth and development processes, also of the age particularities that must be well known by the coach.

The age notion has different senses in the specialty literature; mostly existing difficulty in what concerns the clear delimitation of the age even at the teaching staff.

The chronological age is defined by R. Manno (1996) as the determined age after the number of years, months and days of life.

The chronological age (calendar) is also defined as the age which appreciates the years number from birth to a certain moment of life so it refers to the calendar date, having a statistic value (E. D. Colibaba, I. Bota, 1998).

The biologic age supposes the appreciation of the individual particularities of each athlete in part or of those that deviate from the general age particularities (E. D. Colibaba, I. Bota, 1998). Also, the biologic age is also defined as the determined age depending on the significant biologic characteristics. Among others: osseous maturity, primary and secondary sexual characters, figure and body weight (R. Manno, 1996).

This age is a very important indicator for the physical education coaches and teachers that are in charge with training and selecting the athletes through the fact that they can appreciate the maturity level of the athlete.

In order to realize the appreciation of the biologic age we must take into consideration an entire series of indicators (morphological, functional, endocrine, biochemical etc.) that are in general appreciated in laboratory conditions by the specialists of the reminded domains.

From the existent data in the specialty literature we can say that, in this period (7-8 years), growth is approximately uniform, this being made especially according to the inferior limbs elongation (M. Ifrim, 1986).

Towards the end of the early scholar period, age at which also the selection in speed skating is being made, we can notice an acceleration of the growth process.

At this age, the domain specialists consider that the waist increases with approximately 5 cm annually, the body weight with 2,3 kg--3,5 kg. Also, the musculature structure is similar with the adult's one, being different only the proportion of the muscular fibers (C. Bota, 2000).

At the same time, at the age of realizing the selection in speed skating, specialists have considered an increase of the osseous system at the solicitations of swinging, pressure or traction. The definitization of the cyphose takes place around the age 6-7.

We know that the skeleton of the children of an early scholastic age has in composition a rather high percentage of cartilaginous tissue, the ligaments stretching easily and the articulation being very mobile. Also, the backbone has the highest mobility at children until the age of 9.

Through this study we tried to make a connection between the anthropo-motor development level between boys and girls at an early, very important age for realizing the selection in speed skating.

The specialty federation recommends that during the selection frame we should follow: the general physical development level of the children, of course related to the age and sex particularities, finding the possible physical deficiencies that contraindicate practicing performance sport in general and of the speed skating in particular, also finding the aptitudes with genetic determination favorable for the obtaining of performances at tasks specific to speed skating. As we can notice, the general physical development level at children related to the age and sex particularities holds an important role in the selection process at this age (Romanian Federation of Speed Skating, 1991).

At the same time, we can say that this study wants to re-update the existent data in order to realize an unitary selection system depending on the shown changes at the children's level having at the base the changes provoked by the actual social evolution.

Material and methods

The study I have realized had as starting point certain questions that have their roots in the practical activity concerning the selection process in speed skating, questions that have risen after the discussions held with specialists from the domain and also from the observations of the researched phenomenon.

This study started from the hypothesis that, an agent (coach, teacher etc.), the better he knows the exact actual development level of the children potentially performance athletes, in our case skaters, the more exact he can adapt the specific requests necessary to their initial selection, referring to boys girls. Also, I wished to make a comparison between the development level at boys and girls, knowing that at the age the selection in speed skating takes place, there are certain variations specific to the growth period, in what concerns the anthropo-motor data, these being different both at boys and girls.

The comparative analysis has been realized by studying 100 children of the Ploiesti city (50 boys and 50 girls), with ages of 7--8, measurements being axed on the main anthropo-motor aptitudes used by the specialists, aptitudes that can be measured relatively easy, without needing a complex device.

During the experiment we evaluated the following anthropo-motor aptitudes: waist (cm), bust (cm), weight (kg.), superior and inferior limbs length (cm.), biacromial and bitrohanterian diameters (cm), thoracic perimeter (P.T.) (cm.), thoracic perimeter in profound inhale and forced exhale (cm.).

The used research methods and techniques were: the bibliographic study method, the measurements and recordings method, the statistic-mathematic method, the graphic method and the experimental method.

The statistic processing had at its base the following indicators: the ponderate arithmetic mean, the trust interval of the mean--95% - + 95%, median, the superior limit (xmax), the inferior limit (xmin), quartiles--are those values of the characteristic that divide the series in four equal parts, amplitude (W), dispersion, the quadratic mean deviation (S), the standart error, the variability coefficient (Cv).

The experiment took place in 2007 having at its base more studies of my own and consisted of a series of measurements, comparisons and interpretations.

Obtained results

The obtained results in this experiment are shown in the following tables and graphics, tables 1, 2, 3 and 4 presenting the obtained values with the help of the statistic calculi of the anthropo-motor aptitudes both at boys and girls, and figures 1 to 6 present graphically the differences between the medium values of all researched aptitudes between boys and girls.

From table 1 we can notice that the arithmetic means at boys are of 127,8 cm at waist, 26,3 kg at weight, 68,1 cm at bust, and of 56,9 cm and 59,7 cm at the superior and inferior limbs length.

The mean values obtained with the help of statistic calculi of the diameters and perimeters at boys are of 27,6 cm respective 21,8 cm at the biacromial and bitrohanterian diameters, 61,6 cm at the thoracic perimeter in rest, 66,0 cm and 59,6 cm at the thoracic perimeter in profound inhale and in forced exhale.

Also, we can notice in table 3 the arithmetic means of the anthropo-motor parameters measured at girls, these being of 126,9 cm at waist, 26,4 cm at weight, 69,2 cm at bust, also 54,3 cm and 57,7 cm at the superior and inferior limbs length.

The statistic calculi of the diameters and perimeters at girls give us certain medium values of 27,0 cm respectively 21,4 cm at the biacromial and bitrohanterian diameters, 61,9 cm at the thoracic perimeter in rest and of 65,4 cm and 59,4 cm at the thoracic perimeter in profound inhale and forced exhale.

[FIGURE 1 OMITTED]

[FIGURE 2 OMITTED]

[FIGURE 3 OMITTED]

[FIGURE 4 OMITTED]

[FIGURE 5 OMITTED]

[FIGURE 6 OMITTED]

Discussions

From the previously presented data we can say that, in what concerns the waist, the difference between boys and girls is of 0,9 cm in favor of the boys, the homogeneity degree being high both at the girls and boys. Also, the difference between girls and boys at the weight parameter is insignificant, this being of just 0,1 cm., the homogeneity level being medium at boys and weak at girls.

Studying the figure 3, also the tables 1 and 3, we can say that, the bust values differ at the two sexes, the boys having a smaller bust with 1,1 cm. than the girls, the values homogeneity being higher at both groups.

From the point of view of the superior and inferior limbs length we notice inferior values at both parameters at girls towards the boys, the difference being of 2,6 cm. at the superior limbs and of 2 cm for the inferior ones, the homogeneity degree level being higher at both sexes both at the superior and inferior limbs.

In what concerns the biacromial and bitrohanterian diameters we can notice that the values tendency is an inferior one at the both diameters at girls in comparison with boys, the difference being of 0,6 cm. for the biacromial and of 0,4 cm. for the bitrohanterian diameter. From the obtained data results that the homogeneity is higher, at boys, at both measure diameters, while at girls this is higher only at the biacromial diameter, at the bitrohanterian one the values homogeneity being medium, but at closed level from the higher homogeneity.

The medium values of the thoracic perimeter in rest are relatively close, the difference being of 0,3 cm. in favor of the girls, while at the thoracic perimeters means in profound inhale and forced exhale these values are superior at boys, the differences being of 0,6 cm. for the thoracic perimeter in profound inhale and of 0,2 cm. for the thoracic perimeter in forced exhale. The resulted values have a high level of homogeneity at all the three thoracic perimeters measured for boys and medium for girls.

From the calculus of the indexes Amar and Adrian Ionescu we noticed relatively low differences of proportionality between the two sexes, the values of the index Amar being of 53,28 at boys and 54,53 at

REFERENCES

BOTA, C., 2000, Ergofiziologie, Edit. Globus, Bucuresti, 280-281.

COLIBABA, E. D., BOTA I., 1998, Jocuri sportive--Teorie si metodica , Edit. Aldin, Bucuresti, 213-216.

IFRIM, M., 1986, Antropologie Motrica, Editura Stiintifica si Enciclopedica, Bucuresti, 40-42.

MANNO, R., 1996, Bazele teoretice ale antrenamentului sportiv, C.C.P.S., Bucuresti, 29-30.

FEDERATIA ROMANA DE PATINAJ, 1987, Criterii, probe si norme pentru selectia in patinaj, C.N.E.F.S, C.C.E.F.S. and F.R.P, Bucuresti.

FEDERATIA ROMANA DE PATINAJ, 1991, Patinaj, U.I.P., 29, Bucuresti, 111-112. girls, and the one of the index Adrian Ionescu being of 4,2 at boys and 5,75 at girls. The values of the thoracic elasticity are of 6,4 cm at boys and 6 cm at girls.

Conclusions

--Analyzing the obtained results we can say that at the age of 7-8 there are no considerable differences between boys and girls in what concerns the measured parameters values, these differences being in their large majority insignificant, noticing also relatively minor differences of proportionality between the two sexes.

--At this age, the selection itself must be treated as a process with a progressive character, avoiding the wrong conception to be understood as a moment operation, knowing that the somatic, anthropo-motor parameters have a different evolution at this age, evolution influenced by a series of internal and external factors.

--At the same time, we must make the difference, by the specialists that work with children of this age, between the chronologic and the biological age, between the two being able to appear significant differences.

--The selection process must allow the participation in the performance sport of only those children that have a very good well-being, the health factor being very important at the level of the initial selection process.

--From the presented data we noticed small differences of proportionality between the two sexes.

VAIDA MARIUS

Physical Education and Sport Department, Petroleum and Gas University from Ploiesti, ROMANIA

E-mail: vaidamarius@yahoo.com
Table 1: Obtained values with the help of statistic calculi of the
anthropo-motor aptitudes at boys

Boys                               Waist   Weight   Bust

Number                              50       50      50
Arithmetic mean                    127.8    26.3    68.1
Trust interval of the      95.0%   122.4    23.5    66.0
mean                       95.0%   133.2    29.2    70.2
Median                             126.3    25.5    67.5
Inferior limit
                                   120.0    23.0    65.0
Superior limit                     137.5    32.0    72.0
Lawer Quartile                     123.0    23.3    66.2
Upper Quartile                     133.3    29.3    70.3
Amplitude                           17.5     9.0     7.0
Dispersion                          41.6    11.8     6.3
Quadratic mean deviation             6.5     3.4     2.5
Standard error                       2.3     1.2     0.9
Variability coefficient              5.0    13.0     3.7

Boys                       Superior limbs   Inferior limbs
                               length           length

Number                           50               50
Arithmetic mean                 56.9             59.7
Trust interval of the           53.9             56.3
mean                            59.8             63.1
Median                          55.5             59.1
Inferior limit
                                53.0             55.0
Superior limit                  63.0             66.5
Lawer Quartile                  54.5             56.5
Upper Quartile                  59.5             62.5
Amplitude                       10.0             11.5
Dispersion                      12.4             16.7
Quadratic mean deviation         3.5              4.1
Standard error                   1.2              1.4
Variability coefficient          6.2              6.8

Table 2: Obtained values with the help of statistic calculi of the
diameters and perimeters at boys

Boys                               Biacromial   Bitrohanterian   P.T.
                                    diameter       diameter

Number                                 50             50          50
Arithmetic mean                       27.6           21.8        61.6
Trust interval of the      95.0%      26.1           20.7        58.9
mean                       95.0%      29.0           22.8        64.2
Median                                27.3           22.0        62.0
Inferior limit                        24.5           20.0        57.0
Superior limit                        30.5           23.0        67.0
Lawer Quartile                        27.0           20.5        59.0
Upper Quartile                        28.5           23.0        63.3
Amplitude                             6.0            3.0         10.0
Dispersion                            3.0            1.6         10.2
Quadratic mean deviation              1.7            1.3         3.2
Standard error                        0.6            0.5         1.1
Variability coefficient               6.3            5.9         5.2

Boys                       P.T. in   P.T. in
                           inhale    exhale

Number                       50        50
Arithmetic mean             66.0      59.6
Trust interval of the       63.8      57.3
mean                        68.2      61.8
Median                      66.0      58.8
Inferior limit              63.0      56.0
Superior limit              70.0      64.0
Lawer Quartile              63.5      57.8
Upper Quartile              68.0      61.8
Amplitude                    7.0       8.0
Dispersion                   7.2       7.3
Quadratic mean deviation     2.7       2.7
Standard error               0.9       1.0
Variability coefficient      4.1       4.5

Table 3: Obtained values with the help of statistic calculi of the
anthropo-motor aptitudes at girls

Girls                               Waist   Weight   Bust   Superior
                                                             limbs
                                                             length

Number                               50       50      50       50
Arithmetic mean                     126.9    26.4    69.2     54.3
Trust interval of the      -95.0%   121.3    20.3    66.6     50.6
mean                        95.0%   133.9    32.5    72.7     57.9
Median                              125.7    24.0    67.8     54.0
Inferior limit                      120.0    20.0    66.0     49.5
Superior limit                      142.5    41.0    75.5     63.0
Lawer Quartile                      122.3    21.5    66.7     50.8
Upper Quartile                      131.0    29.5    72.9     56.0
Amplitude                           22.5     21.0    9.5      13.5
Dispersion                          57.2     53.5    13.3     18.9
Quadratic mean deviation             7.6     7.3     3.6      4.4
Standard error                       2.7     2.6     1.3      1.5
Variability coefficient              5.9     27.7    5.2      8.0

Girls                      Inferior
                            limbs
                            length

Number                        50
Arithmetic mean              57.7
Trust interval of the        54.1
mean                         61.9
Median                       55.5
Inferior limit               54.0
Superior limit               67.0
Lawer Quartile               53.9
Upper Quartile               60.8
Amplitude                    13.0
Dispersion                   21.9
Quadratic mean deviation     4.7
Standard error               1.7
Variability coefficient      8.1

Table 4: Obtained values with the help of statistic calculi of the
diameters and perimeters at girls

Girls                               Biacromial   Bitrohanterian P.T.
                                     diameter         diameter

                                        50               50
Arithmetic mean                        27.0             21.4
Trust interval of the      -95.0%      25.5             19.5
mean                        95.0%      28.5             23.4
Median                                 26.3             21.0
Inferior limit                         25.5             19.0
Superior limit                         30.5             25.0
Lawer Quartile                         26.0             19.5
Upper Quartile                         27.8             23.3
Amplitude                              5.0               6.0
Dispersion                             3.1               5.2
Quadratic mean deviation               1.8               2.3
Standard error                         0.6               0.8
Variability coefficient                6.6              10.7

Girls                               P.T.       P.T.
                                  in inhale     in
                                              exhale

                            50       50         50
Arithmetic mean            61.9     65.4       59.4
Trust interval of the      55.3     59.4       53.5
mean                       68.5     71.5       65.3
Median                     60.0     62.8       56.5
Inferior limit             54.0     59.0       52.5
Superior limit             74.0     77.0       71.0
Lawer Quartile             56.0     60.0       55.3
Upper Quartile             67.8     71.0       64.0
Amplitude                  20.0     18.0       18.5
Dispersion                 62.5     52.4       49.9
Quadratic mean deviation   7.9       7.2       7.1
Standard error             2.8       2.6       2.5
Variability coefficient    12.8     11.1       11.9
COPYRIGHT 2010 Ovidius University of Constanta
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2010 Gale, Cengage Learning. All rights reserved.

Article Details
Printer friendly Cite/link Email Feedback
Author:Vaida, Marius
Publication:Ovidius University Annals, Series Physical Education and Sport/Science, Movement and Health
Article Type:Report
Geographic Code:4EXRO
Date:Jun 1, 2010
Words:2930
Previous Article:Strategies to prevent and treat post--traumatic lesions in handball game.
Next Article:Identifying the physiomotor predispozitions considered as favourable for practicing speed skating.
Topics:

Terms of use | Privacy policy | Copyright © 2021 Farlex, Inc. | Feedback | For webmasters |