scholarly journals Age features of O2 mass transfer regimes in adolescents’ body at rest

2021 ◽  
Vol 11 (12) ◽  
pp. 344-349
Author(s):  
D. Komolafe ◽  
M. Filippov ◽  
V. Ilyin ◽  
A. Klimenko

The results of complex studies of the quantitative relationship between the stage-by-stage mass transfer of O2 and the efficiency of cardiorespiratory system functioning in relation to its consumption in adolescents’ body under conditions of relative rest are presented. The results obtained show that in adolescents, the modes of mass transfer of O2 in the body and the nature of the respiratory and circulatory systems functioning in relation to its consumption have a number of age-related differences compared with adult men. So, in adolescents, the external respiration system at rest functions less economically than in adults. Each liter of O2 consumed by adolescents is extracted from almost 3 liters more than in adults the amount of air ventilated per minute through the lungs. The volumetric indicators of blood circulation are also higher in adolescents, which may indicate the influence of neuro-humoral rearrangements in the body during the pubertal period. The coefficient of oxygen utilization by tissues from arterial blood in adolescents turned out to be significantly higher, which may characterize a higher tension of tissue metabolic processes.

2020 ◽  
Vol 44 (2) ◽  
pp. 225-231 ◽  
Author(s):  
J. Alberto Neder

The new generations of physicians are, to a large extent, unaware of the complex philosophical and biological concepts that created the bases of modern medicine. Building on the Hellenistic tradition of the four humors and their qualities, Galen (AD 129 to c. 216) provided a persuasive scheme of the structure and function of the cardiorespiratory system, which lasted, without serious contest, for 1,300 yr. Galen combined teleological concepts with careful clinical observation to defend a coherent and integrated system in which the fire-heart—flaming at the center of the body—interacts with lungs’ air- pneuma to create life. Remarkably, however, he achieved these goals, despite failing to grasp the concept of systemic and pulmonary blood circulations, understand the source and destiny of venous and arterial blood, recognize the lung as the organ responsible for gas exchange, comprehend the actual events taking place in the left ventricle, and identify the source of internal heat. In this article, we outline the alternative theories Galen put forward to explain these complex phenomena. We then discuss how the final consequences of Galen’s flawed anatomical and physiological conceptions do not differ substantially from those obtained if one applies modern concepts. Recognition of this state of affairs may explain why the ancient practitioner could achieve relative success, without harming the patient, to understand and treat a multitude of symptoms and illnesses.


2021 ◽  
Author(s):  
N.V. Balioz ◽  
S.G. Krivoshshekov

An exploration of 110 healthy men (not involved in sports and athletes) with the use of hypoxic loads was carried out. It is established that the specifics of the regulation of gas exchange depend on the nature of training loads (aerobic or mixed), which are manifested in the parameters of chemoreflector reactivity, the pattern of external respiration, gas exchange and activity of the autonomic nervous system under hypoxic load. As sports qualifications grow, the mechanisms of intersystem integration of the functions of the cardio-respiratory system are improved, which is manifested in an increase in cardiorespiratory coherence. Key words: athletes, hypoxia, cardiorespiratory system, gas exchange of the body, chemoreceptor reactivity.


2021 ◽  
pp. 8-17
Author(s):  
A. F. Belyaev ◽  
T. S. Kharkovskaya ◽  
O. N. Fotina ◽  
A. A. Yurchenko

Introduction. The 2019 coronavirus infection (COVID-19) pandemic caused by a novel coronavirus strain (SARS-CoV-2) posed a serious threat to public health around the world. Postcoid syndrome (post-COVID-19 condition, according to ICD-10 code U09 State after COVID-19 or Postcoid state, Postcoid syndrome) is a pathological condition after a coronavirus infection, accompanied by cardio-respiratory, neurological, musculoskeletal, metabolic disorders. According to a number of studies, osteopathic methods of correction increase the lymph flow, immunological protection of the body, help to reduce pain, reduce the restriction of mobility in the chest, and therefore improve the function of external respiration. There are practically no studies that allow assessing the effect of osteopathic correction methods on the function of external respiration at the modern evidence-based level in patients who have undergone COVID pneumonia.The aim was to study the effect of a single procedure of osteopathic correction on the function of external respiration in patients during the rehabilitation period after coronavirus pneumonia.Materials and methods. On the basis of the Primorsky Institute of Vertebroneurology and Manual Medicine (Vladivostok) the rehabilitation of patients after coronavirus pneumonia was carried out using osteopathic correction. The study included 73 patients over the age of 60 years with varying degrees of lung damage and impaired respiratory function. To assess the function of external respiration, spirometry was performed and the vital capacity of the lungs was assessed; pulse oximetry was performed to measure the saturation of arterial blood hemoglobin with oxygen (SpO2). Osteopathic testing and treatment were carried out according to clinical guidelines, and the biomechanics of the chest was additionally investigated. The Statistica-10 software package was used for the statistical analysis of the obtained data.Results. Osteopathic examination revealed the presence of local somatic dysfunctions in 98,8 % of patients (spinal dysfunction, rib dysfunction, diaphragm dysfunction). 87,6 % of patients were diagnosed with regional somatic dysfunctions of thoracic region. Global somatic dysfunctions were diagnosed in 78,4 % of patients. After a single procedure of osteopathic correction, patients had a statistically significant improvement of the external respiration function, manifested in an increase in vital capacity from 78,27±2,79 to 85,36±3,38 % (p=0,0006). Also, the effectiveness of osteopathic correction is confirmed by a significant increase in the average hemoglobin saturation of arterial blood with oxygen. Thus, in patients with low SpO2 levels, the index increased from 94,21±0,21 to 95,09±0,3 % (p=0,02). After a single osteopathic correction procedure, the number of patients with local somatic dysfunctions decreased from 98,8 to 17,7 %; global somatic dysfunctions were revealed only in 16,3 % of patients. All patients noted an improvement in their general condition, a decrease in symptoms of respiratory discomfort and shortness of breath, and an increase in chest excursion.Conclusion. A single procedure of somatic dysfunctions' osteopathic correction in patients after coronavirus pneumonia leads to a statistically significant improvement in respiratory function. The vital capacity and the oxygen saturation of the blood increase in patients. This is caused by the increase of the mobility of the chest (increase in its excursion), diaphragm, ribs, spine. The obtained results allow recommend the inclusion of osteopathic correction in the rehabilitation programs for patients who have undergone coronavirus infection.


Author(s):  
S. G. Gevorkyan ◽  
I. P. Loginov ◽  
Sergey Zinovievich Savin

The article presents the results of a comprehensive study of assessing the quality of mental health of the younger generation of the Far North and Amur ethnic groups living in the Khabarovsk Region. A survey of 110 adolescents aged 10–14 years, including 67 representatives of indigenous people, was conducted; the results of the medical and social survey and the parameters of the psychological and physical components of health were studied. The obtained data indicate the presence of age and gender features of mental health of the younger generation of indigenous peoples, including the formation of social and psychophysiological functioning, under conditions of deprivation against the background of influence of intense age-related psychosomatic adjustment of the body and active socialization of the personality of adolescents.


2019 ◽  
Vol 19 (3) ◽  
pp. 28-35 ◽  
Author(s):  
A Isaev ◽  
R Khomenko ◽  
A Nenasheva ◽  
A Shevtsov ◽  
A Batueva

Aim. The article deals with studying biomechanical, physiological, and age-related features in young weightlifters during quickness and speed-strength qualities enhancement. Materials and methods. The study was conducted at the precompetitive stage of preparation. Weightlifters aged 14–15 and 16–17 years (n = 15) participated in the experiment. Body composition was studied with the Tanita BC-418AA computer analyzer. The spatial characteristics of spine segments were investigated with the help of the MBN-Scanner computer equipment. Postural studies were conducted with the stabilometric systems produced by MBN Russia. Blood flow spectral analysis was performed using impedance rheography (the Centaur diagnostic system). Results. The body composition of young weightlifters was varied in the following range: muscle mass – 52.4–53.9%, fat mass – 9.0–10.2%. BMI was equal 25.64 kg/m2. The data of the orthostatic test in young weightlifters revealed significant changes in HR, total spectrum power (TSP), and stroke volume regulation (SV) in the experimental group (p < 0.05). In the control group, HR changes were higher than in the experimental group. In 50% of athletes from the groups of sports performance enhancement, eukinetic blood flow was revealed, in 32% – hypokinetic, and in 18% – hypertonic. After a year of training, a consistent increase in stroke volume (SV) was registered, as well as a decrease in HR, peripheral vascular resistance (PVR), heart index, and arterial blood pressure. Conclusion. The control system allows revealing in time the problems connected with weightlifters’ preparation, offering rehabilitation measures, and transforming the training process itself (its orientation, volume, intensity) to optimize body functioning in young weightlifters.


2018 ◽  
Vol 17 (3) ◽  
pp. 80-86 ◽  
Author(s):  
I. A. Tikhomirova ◽  
N. V. Baboshina ◽  
S. S. Terekhin

The aim of this study was to assess the age-related features of the functioning of the microcirculation system using the LDF method. The estimation of parameters of microcirculation was performed in practically healthy persons of mature age in a one-stage study and in a prospective study in children aged 8 to 11 years. Stable indices of microcirculation were recorded at different stages of adulthood with maximal values in the middle of this age period. In the prospective study, significant changes in the functioning of the microcirculation system in the period from 9 to 10 years, indicating the beginning of the transition to the pubertal period, were noted. The revealed age-specific features of the functioning of the microcirculation system are due to the level of metabolic activity of the body.


10.12737/7355 ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 0-0
Author(s):  
Устименко ◽  
A. Ustimenko ◽  
Третьяков ◽  
S. Tretyakov ◽  
Ватамова ◽  
...  

Cardiorespiratory system is the most important part of the body, which provides high life expectancy. Special parameters of heart rate dynamics require the development of new approaches for analysis and prediction. The paper presents a comparison of the effective traditional statistical methods, the conventional (in physics) thermodynamic methods, with methods of chaos theory and self-organization to estimate the parameters of heart rate three age groups of Khanty-women in the aspect of identification of their age characteristics. It is proved that there are few statistical differences between the groups (one-type uncertainty), entropic parameters are also less informative. On the contrary, the quasi-attractor’s parameters in three age groups of women are purposefully changed (decrease) and can be described by the Verhulst-Pearl model, with the calculation of the rate of changes over time. A new method for estimating the age-related changes of cardiac parameters based in the calculation of rate of change of the quasi-attractor’s volume is proposed.


2018 ◽  
Vol 96 (5) ◽  
pp. 433-438
Author(s):  
O. A. Sultanova ◽  
Г. A. Lazareva ◽  
A. D. Repetyuk ◽  
A. G. Klimets

Objective: to study the power supply of veloergometric loading in athletes who underwent community-acquired pneumonia to justify the renewal term of physical activity as well as its volume and intensity. Material and methods: 80 athletes aged from 17 to 26 years who were engaged in cyclic sports with I qualification grade and higherwere examined. They were divided into 2 groups: 43 athletes with community-acquired pneumonia (group I) and 37 healthy athletes (group II). The group I included subgroup IA (n=28) withgenerally accepted standard medical treatment of community-acquired pneumonia and subgroup IB (n=15) with additional complex of therapeutic gymnastics, massage, physiotherapeutic procedures. All participants underwent complex general clinical, radiologic and laboratory examinations and alsosome special tests asspirography and spiroergometry, electrocardiography, veloergometric exercise. Results: Athletes with community-acquired pneumonia at the time of clinical recovery showed significant violations of the functional state of the cardiorespiratory system both after exercise and during the recovery period. However amongthe sportsmen with community-acquiredpneumonia all studiedparameters restored more quickly in the subgroup IB, where remedial gymnastics, massage and physiotherapy were used in complex treatment. It was shown that the most informativeparameters for dynamic monitoring of the functional condition of athletes who underwent community-acquired pneumoniawererespiratory minute volume(RMV), heart rate (HR), oxygen pulse of work (peak O pulse), oxygen-utilization coefficient (OUC). Conclusions: athletes who underwentcommunity-acquired pneumoniacan be admitted to training and competitive loads in terms of not earlier than one month after clinical recovery. Admission to training and competitive loads should be conducted after a comparative analysis of the functional parameters of the external respiration system at rest, veloergometric loading and in the recovery period.


Author(s):  
A. E. Chernikova ◽  
Yu. P. Potekhina

Introduction. An osteopathic examination determines the rate, the amplitude and the strength of the main rhythms (cardiac, respiratory and cranial). However, there are relatively few studies in the available literature dedicated to the influence of osteopathic correction (OC) on the characteristics of these rhythms.Goal of research — to study the influence of OC on the rate characteristics of various rhythms of the human body.Materials and methods. 88 adult osteopathic patients aged from 18 to 81 years were examined, among them 30 men and 58 women. All patients received general osteopathic examination. The rate of the cranial rhythm (RCR), respiratory rate (RR) heart rate (HR), the mobility of the nervous processes (MNP) and the connective tissue mobility (CTM) were assessed before and after the OC session.Results. Since age varied greatly in the examined group, a correlation analysis of age-related changes of the assessed rhythms was carried out. Only the CTM correlated with age (r=–0,28; p<0,05) in a statistically significant way. The rank dispersion analysis of Kruskal–Wallis also showed statistically significant difference in this indicator in different age groups (p=0,043). With the increase of years, the CTM decreases gradually. After the OC, the CTM, increased in a statistically significant way (p<0,0001). The RCR varied from 5 to 12 cycles/min in the examined group, which corresponded to the norm. After the OC, the RCR has increased in a statistically significant way (p<0,0001), the MNP has also increased (p<0,0001). The initial heart rate in the subjects varied from 56 to 94 beats/min, and in 15 % it exceeded the norm. After the OC the heart rate corresponded to the norm in all patients. The heart rate and the respiratory rate significantly decreased after the OC (р<0,0001).Conclusion. The described biorhythm changes after the OC session may be indicative of the improvement of the nervous regulation, of the normalization of the autonomic balance, of the improvement of the biomechanical properties of body tissues and of the increase of their mobility. The assessed parameters can be measured quickly without any additional equipment and can be used in order to study the results of the OC.


Author(s):  
N. I. Maslova

The article presents analysis of material and results of their own studies on changes in the permeability of cellular structures, organs and tissues in carp, which is of great importance in determining age-related indicators. The cells permeability in liver and gonads estimation was carried out under the experimental base of VNIIR on two carp genotypes during the pre-spawning period. The carp groups taken for analysis differed significantly in their genotypes. In females of the Khrapunov group the fecundity was 2023.0 thousand units, while the number of oocytes filled with yolk was only 0.7%, in the Ostashevsky ones - 1370.0 thousand units and 8.6%, respectively. During estimation the chemical composition of the generative tissue in females and males it was established that the cholesterol and lecithin content in males is higher than that of females, while feeding dependence is observed, especially on the amount of protein in the diet. For example, in females on protein diet contained less glycogen in gonads than on females on carbohydrate diet. Lecithin and cholesterol are higher in males than in females, which corresponds to increasing the Gyurdy Ratio (estimation of cell membrane strength). In spermatogenesis the content of phospholipids and cholesterol in the liver was decreased less than during ovogenesis. This indicates a lower level of synthetic processes in the milts compared with the ovaries. The cholesterol content in sperm is higher than in caviar in 19.6 times, and phospholipids almost doubled. With increasing age, the Gyordy Ratio for caviar decreases, for sperm it increases, the percentage of caviar fertilization increases. As the body age metabolism deteriorates, cellular permeability decreases (the ratio of lecithin and cholesterol changes significantly). At the same time, the permeability of cells in different organs and tissues varies and depends on living conditions, especially feeding and to some extent on the origin. In fish the gross productivity decreases as growth slows down and more energy is spent on adaptation to environmental conditions.


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