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American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 06 PAGES: 25-30 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

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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 

body 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 body 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. 

 

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Volume 04 Issue 06-2024 26 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 06 PAGES: 25-30 

OCLC – 1121105677     

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Publisher: Oscar Publishing Services 

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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 body, 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 body. 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 

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Volume 04 Issue 06-2024 27 

                 

 
 

   
  
 

American Journal Of Biomedical Science & Pharmaceutical Innovation    
(ISSN – 2771-2753) 
VOLUME 04 ISSUE 06 PAGES: 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 body. 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 body. 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 body 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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Publisher: Oscar Publishing Services 

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(ISSN – 2771-2753) 
VOLUME 04 ISSUE 06 PAGES: 25-30 

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