Volume 04 Issue 06-2024
25
American Journal Of Biomedical Science & Pharmaceutical Innovation
(ISSN
–
2771-2753)
VOLUME
04
ISSUE
06
P
AGES
:
25-30
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
The article scientifically substantiates the possibility of adaptation of 16-17 year old adolescents to heavy physical
activity and the compatibility of physiological processes with the mechanisms of action.
KEYWORDS
Heavy physical activity in adolescents, physiological processes, adaptation possibilities.
INTRODUCTION
The objective of this work was to establish an objective
assessment of the adequacy of the reactions of
physiological indicators and the adaptive ability of the
div of adolescents, aged 16-17 years, when carrying
heavy loads established by the Labor Code.
During the work, pulse and respiration rates were
recorded, pulmonary ventilation, oxygen consumption
and energy expenditure of the div were determined.
Before work and during rest, pulse and respiration
rates, blood pressure, stroke and cardiac output
(according to the Starr formula), latent period of the
visual-motor reaction, physiological hand tremor,
muscle strength and endurance to static stress were
studied [4,5] The periods of continuous carrying of
weights by adolescents were limited to 20 minutes.
This duration of continuous carrying of loads was
established by us based on the results of preliminary
observations. The study regimen consisted of six 20-
Research Article
STUDYING THE DYNAMICS OF SOME FUNCTIONS OF THE BODY OF
ADOLESCENTS WHEN CARRYING WEIGHTS
Submission Date:
June 07, 2024,
Accepted Date:
June 12, 2024,
Published Date:
June 17, 2024
Crossref doi:
https://doi.org/10.37547/ajbspi/Volume04Issue06-05
Allamuratov Mirtaza
Associate professor at Department of Human and Animal Physiology at National University of Uzbekistan
named after Mirzo Ulugbek, Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajbspi
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 04 Issue 06-2024
26
American Journal Of Biomedical Science & Pharmaceutical Innovation
(ISSN
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2771-2753)
VOLUME
04
ISSUE
06
P
AGES
:
25-30
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
minute working periods with 15 minutes of sitting rest
after each working period. the working time with the
load was 2 hours (i.e. 1/3 of the working time of
adolescents, in accordance with the Labor Code).
A study on the effect of carrying a load of 16.4 kg by
adolescents aged 16 was conducted on 24 adolescents.
Carrying this load caused an increase in the duration of
the latent period of the visual-motor reaction
throughout the study and especially at the end of the
experiment. There was an increase in heart rate by 35-
44.5%. When analyzing individual data, each
subsequent working period occurred with a greater
pulse shift than the previous one. Pulse pressure
increased throughout the study. Indicators of external
respiration and gas exchange increased by 1.7-2.0
times. The increase in pulmonary ventilation occurred
mainly due to increased breathing; there was a
disturbance in the rhythm of respiratory movements
and breath holding. There was a decrease in muscle
strength (by 28% in the right and 35% in the left arm)
and endurance to static stress (in the right arm by
52.6%, in the left arm by 56.7%). When carrying a load,
all adolescents complained of pain in the muscles of
the arms, shoulders and forearm, and often
intercepted the load; cyanosis of the hands was noted.
During rest and at the end of the study, hemodynamic
parameters were not restored within 15 minutes of
rest. Not all teenagers who carried this load were able
to complete the full amount of work. 10 people (41.6%)
refused to work during various working periods. In
them, a significant lengthening of the latent period of
the visual-motor reaction was noted (from 0.66 to 1.25
seconds) and an increase in differentiation disorders.
The pulse rate increased sharply towards the end of
each working period, and at the time of refusal to
work, it increased by 115% compared to the initial one.
In recent working periods, there was an increase in
breathing with an increasing pulse rate. At the same
time, pulmonary ventilation, breathing depth, and
oxygen consumption decreased. Refusal to work was
preceded by signs of severe fatigue: pale face, profuse
sweating, cyanosis of the hands, decreased interest in
the environment, then the fingers unclenched and the
load fell from the hands [1].
Due to the fact that the data obtained indicate
unfavorable changes in the div, pronounced
subjective and objective signs of severe fatigue and
refusal to work, we came to the conclusion that
carrying a load of 16.4 kg does not correspond to the
functional capabilities of the div. In this regard,
observations were carried out on 22 adolescents
carrying a load of 14 kg. Due to the fact that when
carrying a load of 14 kg, all adolescents experienced
similar unfavorable functional changes, and 6
adolescents refused to work, studies were conducted
with a load of 12 kg. The research was conducted on 20
teenagers. They all completed the full amount of work.
Functional changes in the central nervous system and
cardiovascular,
respiratory
and
neuromuscular
systems were adequate to the load tolerated and
Volume 04 Issue 06-2024
27
American Journal Of Biomedical Science & Pharmaceutical Innovation
(ISSN
–
2771-2753)
VOLUME
04
ISSUE
06
P
AGES
:
25-30
OCLC
–
1121105677
Publisher:
Oscar Publishing Services
Servi
indicated a moderate load. Therefore, we consider it
possible to recommend that for adolescents aged 16
years, a load weighing 12 kg as the maximum load to be
carried is a load weighing 12 kg, as it corresponds to the
functional capabilities of the div. To study the effect
of carrying a load of 16.4 kg on adolescents aged 17
years, studies were conducted on 10 subjects. The data
obtained indicate that carrying this load does not cause
significant functional changes in the neurodynamics of
adolescents. On the part of the cardiovascular and
respiratory systems, there was a slight increase in shift
towards the end of each period, however, by the fifth
minute of rest, these functions were restored. Changes
in gas exchange indicators indicate strictly coordinated
activity of the circulatory and respiratory systems [2].
Based on the data obtained, we can say that carrying a
load of 16.4 kg, established by the Labor Code, in
adolescents 17 years old does not cause adverse
changes and, therefore, corresponds to the functional
capabilities of the div. Thus, as a result of the
research, a number of practically important provisions
have been established that indicate that experimental
modeling of teenagers carrying weights in laboratory
conditions (walking on a treadmill with a load in both
hands, lowered down) made it possible to detect
certain patterns in the dynamics of changes in the
functional state of the subjects, depending on their age
and the size of the load. A study of the effect of
carrying loads of 16.4 kg and 14 kg on adolescents 16
years old revealed unfavorable changes in the
functional state of the div of adolescents:
pronounced subjective and objective signs of severe
fatigue and refusal to work (in 41% of cases). Favorable
dynamics of performance indicators were observed in
these adolescents when carrying a load of 12 kg. A
study of the effect of carrying a weight of 16.4 kg by
adolescents 17 years old revealed an adequate
response from indicators of the functional state of the
central nervous system, cardiovascular and respiratory
systems, as well as the neuromuscular system.
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