scholarly journals Research project: State and Stimulation of Development in Children Aged 8-9 Living Under War Conditions

1998 ◽  
Vol 1 (1) ◽  
pp. 26-31
Author(s):  
M. Vranešić ◽  
Dj. Radojević ◽  
E. Ićindić-Nakaš ◽  
H. Kulenović

The somatic, functional and metabolic characteristics of children at 8 years of age have been established. These children have, for the previous three years, lived under stressful conditions of direct shelling, poor nutrition and movement. At the same time there has been an evaluation of the effects of programmed physical activities which have been applied in the aim of stimulating natural physical dynamics and functional developments and the elimination of stagnation of development which occurs from conditions of unfavorable factors. The research and the program of physical activities included 41 boys, starting at an average age of 8 years and four months. The somatic characteristics of the boys, according to 25 antropo-metric measures (IBP), show a lag in the boy’s physical development according to their age group by one year. The lagging behind is especially evident in volume dimensions and underskin tissue fat (Przulj, 1991., Bonacin, 1995. Blaha, 1982.). An improvement of conditions and a greater scope of movement activities for the duration of 8 months did not significantly influence on the improvement of the somatic and functional status of the boys in comparison with the controlled group (N=21) of the same average age during another measurement period. While resting, on the level of aerobic threshold, anaerobic threshold and maximal oxygen uptake, the value of ergonometric, functional and metabolic parameters were confirmed: V02 stpd, Ve btps. Ve * V02-1, Ve*VC02-l, RQ, fc (beats*min-l), work load in Watts and on the basis of these relative indicators were completed. The gradual growth of work load was completed with the help of bicyklergometer (Monark). After 3 minutes of easy pedaling (warming-up) an initial work load was given of Watt*body mass and increased by 1/3 of the mass*Watt every minute until the achievement of maximal oxygen uptake. Individual aerobic and anaerobic thresholds (Aep) and (Anp), for each person examined were confirmed on the basis of the smallest sizes in the points of the crucial curves Ve*V02-l and Ve*VC02-l (Wasserman et al., 1973 and 1991, Cooper et al, 1984, Yacov, 1991). For the level of maximum oxygen uptake, the work load was taken, on which the greatest worth of V02 was achieved and it did not increase with the foflowing greater work load. The average value of ergono-metric, functional and metabolic parameters of the initial state and the final measurement of the experiment group:   -level of aerobic threshold: 2.4 and 2.3 work load (Watt*mass-1), 30.57 and 28.37 V02kg(ml*kg-1 *min-I), 168.6 and 166.6 fc(beats*min-l), 5.08 and 5.31 V02*fc-1, 64.7 ad 62.6 V02*V02 max-1 %, 85.9 and 85.4 fc*fc(V02max)-l %, 63.4 and 62.6 W*W(V02max-l)%, -level of anaerobic threshold: 2.7 and 2.7 work load (Watt*mass-1), 33.15 and 34.54 V02 kg(ml*kg-l*min-1), 175.4 and 175.7 fc (beats*min-l), 5.6 and 6.1 V02*fc-I, 74.4 and 76.2 V02*V02max-l%, 89.3 and 90.1 fc*fc(V02max), 70.7 and 72.7 W*W(V02max)-1%, -level of maximum oxygen uptake: 3.8 and 3.7 work load (Watt*mass-1), 47.2 and 45.3 V02kg(ml*kg-l*min-l), 196.3 and 195.1 fc(beats*min-l), 6.8 and 7.3 V02*fc-1.   Significant statistical differences are confirmed only on the values of V02* fc-1 I and II measuring Ρ = 001. The results confirm the assumption of the general stråte-gy of adaptation, directed in the formation and protection of functional reserves from exhaustion, for priority of growth needs and development and only on that basis can an increase of ability for an even greater level of their total and rational usage can occur. For a significant growth ability of a greater level of mobilization of functional reserves there is a need for a greater intensity and a longer time period in completing physical activities.

1988 ◽  
Vol 09 (06) ◽  
pp. 433-437 ◽  
Author(s):  
I. Nemoto ◽  
K. Iwaoka ◽  
K. Funato ◽  
N. Yoshioka ◽  
M. Miyashita

2001 ◽  
Vol 92 (1) ◽  
pp. 107-120 ◽  
Author(s):  
Anne Deflandre ◽  
Jean Lorant ◽  
Olivier Gavarry ◽  
Guy Falgairette

The links between morphological, biological, sociological, psychological, and environmental characteristics, the practice of organized sports, and moderate to vigorous physical activities were examined by means of a questionnaire given to 48 high-school students aged between 16 and 19 years and their continuous heart-rate monitoring. Few correlations appear between these characteristics and moderate to vigorous physical activities. Only maximal oxygen uptake is linked to this type of activity in girls. Concerning sport involvement, correlations were more numerous for girls than boys. Physical and sports activities of girls were linked with maximal oxygen uptake, sport involvement of father, support, and encouragements of practice, perception of own activity, and private environment. Among boys, physical and sport activities were only linked with sport involvement of friends and perception of own activity. Unlike boys, physical and sport activities among girls seemed more strongly linked to sociological characteristics than other ones.


2019 ◽  
Vol 40 (06) ◽  
pp. 409-415 ◽  
Author(s):  
Jana Windhaber ◽  
Monica Steinbauer ◽  
Christoph Castellani ◽  
Georg Singer ◽  
Holger Till ◽  
...  

AbstractThe aim of this study was to evaluate whether spiroergometry performance in adolescent alpine ski racers can predict later advancement to a professional career. Over 10 consecutive years, adolescent skiers of the regional Austrian Youth Skier Squad (local level) underwent annual medical examinations, including exhaustive bicycle spiroergometry. The performance was determined at fixed (2 and 4 mmol/l serum lactate) and individual (individual anaerobic threshold (IAT) and lactate equivalent (LAE)) thresholds. Data from the last available test were compared between skiers who later advanced to the professional level (Austrian national ski team) and those who did not. Ninety-seven alpine skiers (n=51 male; n=46 female); mean age 16.6 years (range 15–18) were included. Of these, 18 adolescents (n=10 male; n=8 female) entered a professional career. No significant differences were found for maximum oxygen uptake (VO2max). Athletes advancing to the professional level had significantly higher performance and VO2 at LAE. Additionally, male professionals had significantly higher performances at fixed thresholds and the IAT. The performance and VO2 at the LAE, and thus the ability to produce power at a particular metabolic threshold, was the most relevant spiroergometric parameter to predict a later professional career.


1978 ◽  
Vol 45 (1) ◽  
pp. 64-68 ◽  
Author(s):  
J. S. Petrofsky ◽  
A. R. Lind

Three well-trained male subjects served as volunteers in these experiments to examine the physiological capacity for extended work during lifting tasks. The maximal oxygen uptake (VO2max) during lifting was always lower than work on the bicycle ergometer. However, the work load during lifting which could be maintained for 1--4 h was 50% of the VO2max for lifting each specific weight of box; the limit for lifting light boxes without fatigue was at an oxygen uptake of about 25% of the VO2max obtained from bicycle ergometry. Significant fatigue in the forearm muscles was found during prolonged lifting as assessed from the endurance of isometric contractions and from the surface electromyogram (EMG), and was more pronounced as the weight of the box increased.


1967 ◽  
Vol 45 (6) ◽  
pp. 937-946 ◽  
Author(s):  
Gordon R. Cumming ◽  
Werner Friesen

Seven to 15 maximal exercise tests on a cycle ergometer were done on twenty boys, 11 to 15 years of age, until the work load was sufficiently high that it could not be sustained for 3 min. The mean maximal pulse rate was 202 beats/min, and the mean maximal oxygen uptake was 53.8 ml/kg per min. A plateau of the oxygen uptake curve occurred in only 7 of the 20 subjects, whereas the pulse rate reached a plateau in 13 subjects. On the basis of the pulse rate – work load straight line relationship for submaximal exercise, the intensity of the load that the subjects were able to complete was such that a mean predicted pulse rate of 247 beats/min would have resulted. This information can be utilized to obtain maximal oxygen uptake from a single test in children.


2017 ◽  
Vol 21 (4) ◽  
pp. 171 ◽  
Author(s):  
Soyal Mehmet ◽  
Korkmaz Eryılmaz Selcen ◽  
Polat Metin ◽  
Aydoğan Sami

1984 ◽  
Vol 16 (2) ◽  
pp. 183
Author(s):  
L. Turcotte ◽  
W. Byrnes ◽  
P. Frykman ◽  
P. Freedson ◽  
F. Katch

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