This study presents the results of the analysis of the effects of body composition on the
manifestation of static strength in girls of lower elementary school age. The sample consisted
of 63 girls aged seven. All the girls were from Subotica and attend elementary schools. Height
was measured by the use of Martin’s anthropometer, weight was measured by the use of InBody
230. The measures of body composition (body fat, total body water and skeletal muscle mass)
were assessed by InBody 230, a device which functions on the base of bioelectrical impedance.
The static strength of arms and shoulder area was assessed by „Bent-arm hang” test. The results
pointed to the statistically significant effects of the body composition on the manifestation of static
strength in girls of lower elementary school age. 

On the basis of recently published experimental results of Abramowitch et al. (2004), dealing
with viscoelastic properties of sham operated and healing MCL, we show that the fractional Zener
model of viscoelastic body seems to be very tractable tool for rheological description of different
states of biological tissues. In this paper medial collateral ligament of the knee will be described
by means of the method of Dankuc et al. 2010, who examined middle ear structures and ramp-and
hold stress relaxation experiments. Two different states of MCL were described by four different
constants representing modulus of elasticity, the order of fractional derivative and two relaxation
constants. Predictions of the model are in good agreement with the experimental results.

The aim of the study was to determine if and to what extent equal point of view of
spouses regarding recreation can be seen as a significant indicator of the quality and stability
of marital relationship in our society. For this purpose 436 women, who live in marriage or
non-marital cohabitation, aged 19- 64, were tested. The differences among the tested women
who share the same attitude about recreation with their spouses and those who do not, were
tested by discriminatory analysis regarding the following: different demographic variables, general satisfaction with the marriage and marital relationship, different aspects of the quality
of the marital relationship, style of affectional bond, marital locus of control, differences in
judgement of personal and spouseís values, presence of stressful events, strategies for
overcoming the stress, stability of the marriage and intention to seek professional
psychological help. Statistically significant discriminatory factor (rc=0.54; p= 0.00) was
obtained which is interpreted as harmonious in contrast to the conflict prone marital
relationship. The main conclusion of the research is that the spousal approval of recreation
represents a good indicator of general harmony in a marital relationship.

The research deals with cross-section analysis of ontogenetic characteristics of basic
kinematic parameters of the running stride in terms of age and gender from 7 to 18 years of
age. There were monitored: average velocity, stride frequency and length, duration of support
and flying phase, as well as other derived indicators at 10 m with 15 m flying start. Sample
consisted of 1299 male and 1288 female students of elementary and high schools in
Bratislava. Authors determined high age dependency of running speed and stride length on
age. On the other hand, there was high ontogenetic stability of the indicators (stride
frequency, duration of support and flying phase) in the population of 7 to 18 year-old youth. Ontogenetically stable parameters deteriorated partially in prepubescent and at the beginning
of the pubescent period in the age 11 ñ 15. This relates to rapid growth of body height and
weight and deterioration of biomechanical and coordination conditions of an organism. Those
finding lead the authors to the conclusion, that ontogenetically stable indicators comprise so
called dispositional factors in evaluating the rate of talent for running speed.

The aim of this study was to examine the relationship between morphological
characteristics and motor abilities of boys and girls aged from 11 to 14 so that the process of
physical education could be in line with the dynamics of growth and development as well as
the differences between the sexes. The total sample consisted of 730 subjects, divided into
four age groups of 11, 12, 13 and 14. Eight motor tests were conducted and 9 anthropometric
measures were taken. The boys of all ages achieved better results in tests of coordination, repetitive and explosive power, while girls of all age groups scored better in flexibility tests. The largest differences between the sexes at the ages of 11 and 12 years were the results of
variables evaluating motor abilities. At the age of 13, a significant difference in skinfold
thickness was found in favor of girls and at the age of 14 in the voluminousness in favor of
boys. In boys aged from 13 and 14, the increase in body volume was negatively correlated
with the increase in skinfold thickness, indicating that the increase of voluminousness is
caused by the increase of muscle mass. It is therefore concluded that the linear increase of the
differences in motor performance tests under 14 years of age is caused by increased muscle
mass in boys, especially in tests where achievement depends on the strength and production
of force.

The aim of this study is to determine the differences in certain morphological
characteristics and thigh muscle force of bounce leg between football players and
goalkeepers. The examined group consisted of 15 goalkeepers and 14 players, aged 15 ñ 18
years, from Vojvodina cadet league. Five parameters were tested by means of isokinetic
dynamometer, and 6 morphological factors were measured. The differences between sub
samples were gained by multivariable and univariable analysis of variance. Multivariable
analysis was used to determine significant difference at the level (p =.00), and we determined
statistically significant difference on individual basis in body height and in muscle mass
percentage. Almost equal results in thigh muscle force of bounce leg among the subjects and
no difference in other variables can be explained by identical training process for players and
goalkeepers. The data gathered demonstrate that in the future it will be necessary to
implement different training process, specially designed for goalkeepers.

The aim of this paper is to establish the effects of an experimental treatment, so called
ìRussian complexî on explosive leg power of the basketball players belonging to the
experimental group. Explosive leg power was measured on the sample consisting of 40
basketball players from the Serbian league: 20 basketball players from the experimental group
and 20 from the control group, all aged between 16 and 18. The experimental group was the
subject of the experimental treatment, so called ìRussian complexî, which included gym
exercises and took place twice a week during the period of ten weeks. The results of the
univariate analysis of covariance indicated that the experimental programme led to a
statistically significant improvement of all three motor variables used for the evaluation of
explosive leg power (Sargent Jump Test, Standing Triple Jump and Standing Jump) in the
experimental group of examinees, in comparison to the control group. 

In static apnea discipline diver holds the breath in standstill condition. Diving
reflex represents a reaction of the body to apnea dive with responses of effectors:
bradycardia, peripheral vasoconstriction, splenic contractions. Physiological significance
of these body changes implies reduction of oxygen consumption. The main objective of
this research is to examine characteristics of connection between heart rate changes (HR)
and changes in oxygen saturation in blood (SaO2) during apnea. A group of 15 breath
hold divers was examined. Tests were conducted during static apnea, heart rate (HR) was
measured as well as oxygen saturation in blood (SaO2). The changes in HR and SaO2
during apnea demonstrated statistically significant correlation. Higher HR values in apnea
indicate higher mental tonus during apnea which is followed by higher muscle tonus. The
consequence is a greater consumption of O2 and lower values of SaO2min. There is
statistically significant correlation between intensity of diving reflex activation and
oxygen conserving (less reduction of SaO2).

Measurement of spinal range of motion is frequently used objective approach in
assessment of patients with low back pain, also because of the ease of use. Although
emphasized, stretching of hip flexors and extensors is often performed inappropriately. We
hypothesized that subjects with reduced hip mobility will probably compensate with pronounced
spine mobility and that a significant negative correlation exist between these two entities. Fifty
one healthy adults (age 43.7 ± 15.1 years) that are regularly involved in moderate physical
activity (agility and endurance) participated in this study. Range of motion was measured by
means of goniometry and adjusted Schober method that were previously shown to be reliable
methods for spine and hip mobility assessment. The correlation between spine movements in
different anatomical planes and correlation between spine and hip mobility was calculated. Pearson correlation coefficients were calculated between pairs of flexibility variables. Contrary
to our expectations, analysis revealed absence of the correlation between the flexion of the trunk
and flexion of the hip. However, moderate correlations were found between flexibility parameters
related to trunk movements in different direction. Ranges of motion of the hip and of the trunk
give complementary information and cannot be predicted from one another. Therefore, mobility
of both joints/regions should be evaluated in order to get insightful information about movement
function of the lumbo-pelvic region either in the context of low back pain or sports performance.

The aim of this study is to determine the motivational structure of youths for practicing
sports. The research included 60 participants, of both sexes, all aged between 13 and 16. The
survey method was applied. The research results showed the following facts: that intrinsic
motivation is the main instigator for practicing sports and 58.33% of the participants personally
made the decision to start doing sports. As for the structure of motives, health is in the first place
of importance, followed by love for sports, then success, friendship, popularity and good looks. Money as primary motive is penultimate instigator, while fun is the last main motive for doing
sports. The hierarchy of motives for initial involvement in sports activities does not differ on the
basis of gender. Children are most intensively involved in sports between 6 and 10 years of age. The main conclusion of the research is that coaches should improve the consciousness of
practicing sports for the purposes of fun and friendship.