Background Of Fatigue Research Articles

Physical readiness of scouts - as the main component of their professional activity

The existence of threats to national security, especially the territorial integrity of the country, requires the existence of such Armed Forces in Ukraine that could to ensure the complete security of our state in all situations. Analyzing the activities of reconnaissance specialists, the conditions of the present and the fighting on the territory of the state, we can say that recently a weak possession of personal small arms, hand-to-hand combat techniques, insufficient skills of servicemen to overcome existing engineering barriers, rubble, especially against the background of fatigue, have been revealed. At the same time, there is a lack of scientific, theoretical, theoretical and methodological justification of practical ways to achieve the physical readiness of military personnel, the presence of weak links in the system of their preparation for action in extreme conditions of combat activity. One of the reasons, in our opinion, is the imperfect and long-term solution of organizational issues regarding the introduction of a scientific approach to the physical training of servicemen of intelligence units in the conditions of warfare. Thus, the urgent issue remains the search for ways to increase the effectiveness of physical training of the reconnaissance units of the Armed Forces of the Armed Forces of Ukraine and their implementation in the guidance documents on physical training.

Development of the modified clothoidal (MCL) shape of composite dowels against the background of fatigue and technological issues

Abstract Composite dowels opened new possibilities for engineers designing composite structures. The fundamental and most important characteristic of composite dowels is the shape of the cutting pattern (called line). It is important to understand why only one particular shape of the cutting line, the modified clothoidal (MCL) shape, is being used in bridge engineering, while so many different shapes have been investigated by many researchers. The essential part of the process of developing composite dowels – the development of shape of the cutting line – is presented in this paper. The investigation, development, and evolution of the MCL shape, which is the final form of composite dowels for bridges and has been widely introduced in bridge engineering, are presented. The results of comparative tests of different shapes under cyclic loads are discussed. The background for the design formulas for the steel part and the fabrication aspects are highlighted.

A study of the special physical fitness of qualified 16-17 year old cyclists over two intense weeks

The paper analyses the results of physical tests of 16-17 year old cyclists against the background of recovery and fatigue after a week-long intensive micro-cycles. The aim of the work is to determine the level of special physical qualities of 16-17 year old cyclists by type of temperament under the influence of load in weekly micro-cycles. Result. The results were determined on the background of fatigue after two weeks of intensive micro-cycles. Sanguine cyclists had better results in the one- minute pedal turnover test by 4 turns and in the 1 km race by 4 seconds; worse results in the 5 km race by 15 seconds and in the 10 km race by 29 seconds; choleric perform better in the one minute pedal revolution test by 3 revolutions, worse in the 1 km race by 4 s, in the 5 km race by 29 s and in the 10 km race by 57 s; phlegmatic have better test results in pedal revolutions per minute by 3 revolutions, worse in the 1 km race by 2 s, in the 5 km race by 38 s and in the 10 km race by 31 s;; melancholics perform better in the one-minute pedal stroke test by 8 revolutions, worse in the 1 km race by 8 seconds, in the 5 km race by 29 seconds and in the 10 km race by 1 minute.

Influence of the type of the nervous system on the velocity of punching by kickboxers

The purpose of the article was to study the influence of the type of nervous system on the speed of hitting against the background of fatigue. The study was conducted on the basis of the Kharkiv State Academy of Physical Culture. A total of 33 kickboxing athletes took part in the study, 15 of whom have the first sports category, 17 have second. The type of the nervous system was determined by two tests - the Schulte tables and the tapping test. Punching speed testing was determined by performing 20 consecutive punches without rest. According to the efficiency of working on the Schulte tables, control group I has a tendency to increase the result from table to table, which characterizes the subjects as having a weak nervous system. The graph of control group II reaches a peak on the second table, and then gradually decreases. Thus, control group II can be characterized as athletes with a strong type of nervous system.
 The obtained data on the type of nervous system in the groups of subjects are confirmed by means of a tapping test (. Thus, KGI has a downward graph starting with 5.3 hand movements per second during the first five seconds with a gradual decrease until the thirtieth second. KGII has a curved graph of the results of the tapping test with a peak at 10-15 seconds. During the first five seconds, the group average was 4.7 hand movements per second, rising to 5.5 and holding at that level, then decreasing to 4.4 movements per second. According to the results of the study, it was found that athletes with a strong type of nervous system can maintain the speed of hitting for a longer time.

Awareness of junior schoolchildren about aspects of healthy lifestyle

The full development of primary school students in accordance with their age and psychophysiological characteristics involves their involvement in the principles of a healthy lifestyle. This requires the development of sound and well-founded knowledge on how to preserve and promote health. The purpose of the work is to establish the level of informed primary school students about the means and methods of maintaining good health. The study involved 147 students of primary school age in secondary schools. Kyiv. Among the research methods are questionnaires and statistical analysis of personal data. Results. It was found that the vast majority of younger students (p <0.05) have an idea of the role of physical culture in maintaining and promoting health and have knowledge of the necessary equipment for exercise. However, in general, younger students did not determine which well- being is optimal for independent exercise. Thus, 31.29% of respondents said they did not know the answer, 11.56% believe that classes on the background of fatigue can "relieve fatigue", and 4.08 and 3.04% of children think that classes on the background of illness or illness conditions, respectively, can overcome the disease. Unfortunately, the lack of awareness of primary school students in the issues of safe behavior while bathing was stated. Also among the respondents is the share of children with misconceptions about breathing while walking and running, about eating before exercise and drinking during exercise. At the same time, younger students have a vague idea of the criteria by which they can control their body condition, methods of hardening, and are not guided by the question of what is the optimal duration of morning hygienic exercises and daily walks in the fresh air. Therefore, there is a need to organize additional activities aimed at expanding the health-preserving knowledge of primary school students both in educational institutions and abroad.

The role of axonopathy in the mechanisms of development of demyelination processes in the central and peripheral nervous system

The role of axonopathy in the development of demyelinating processes in the CNS and peripheral nervous system was addressed in studies of 43 patients with multiple sclerosis (MS) and 144 patients with chronic inflammatory demyelinating polyneuropathy (CIDPN). Patients with MS were found to have foci of reduced MRI intensity in the T1 regime ("black holes," present in 28%) and regional atrophy of the cerebral cortex (in 46%), which showed a significant association with the degree of invalidity on the EDSS (Kendall tau = 0.38 and 0.43; p = 0.038 and 0.021, respectively). The mean fatigue score on the FSS was 4.9 (3.6; 5.4). A significant increase in the central conduction time on the background of fatigue (p = 0.016), along with an absence of signs of impaired reliability of neuromuscular transmission and an absence of past-activation phenomena, suggested that central mechanisms were predominant in the formation of fatigue phenomena in MS. In addition, 34.9% of patients with MS showed signs of peripheral nervous system involvement, while the clinical-electrophysiological pattern in 12.5% of patients with CIDPN showed signs of CNS involvement. These data widen existing concepts of the mechanisms of formation of axonopathy in the CNS, based on evidence for the development of axon-demyelinating processes in CIDPN, which is the most accessible model of demyelination for study using contemporary neurophysiological methods.

Rhodiola SHR-5 extract and the treatment of depression

Rhodiola (Rhodiola rosea) is a medicinal plant exhibiting significant adaptogenic properties that have been extensively studied and exploited in Scandinavia and Russia with particular reference to increasing mental performance against a background of fatigue and asthenia. In a randomised, double-blind, placebo-controlled phase III clinical trial, the effects of standardised extract SHR-5 of Rhodiola rhizome on mild to moderate depression were examined. Medication with SHR-5 was administered in the form of 400mg tablets each of which contained 170mg of Rhodiola extract that had been quantified by HPLC with respect to triandrin, rhodioloside, tyrosol and rosavin content. Male and female participants, aged between 18–70 years, were selected according to DSM-IV diagnostic criteria for depression, the severity of which was determined by scores gained in Beck Depression Inventory and Hamilton Rating Scale for Depression (HAMD) questionnaires. Patients with initial HAMD scores between 21 and 31 were randomised into three groups, one of which (group A: n=30) received two tablets daily of SHR-5 (340mg/day), a second (group B: n=29) received two tablets twice-per-day of SHR-5 (680mg/day), whilst a third (group C: n=29) received two placebo tablets daily. The efficacy of the extract with respect to the reduction of depressive condition was assessed from the total and specific subgroup HAMD scores obtained on days 0 and 42 of the study period. For individuals in groups A and B, overall depression together with insomnia, emotional instability and somatisation, but not self-esteem, improved significantly following medication, whilst the placebo group showed no such improvements. No serious side effects were recorded in any of the study groups, and we were able to show that in animal systems SHR-5 does not interact with other drugs sensitive to CYP1A2, CYP2C9 and CYP3A4 enzymes. Results from a series of experiments involving rabbits have demonstrated that SHR-5 inhibits the over-activation of p-SAPK/p-JNK induced by emotional stress. The SAPK/JNK pathway is known to be involved in the pathogenesis of glucocorticoid resistance (GR), found in subgroups of patients with major depression, and the activation of SAPK/JNK has been reported to inhibit GR function. Hence it can be hypothesised that the antidepressant effects of SHR-5 are associated with the inhibition of stress activated protein kinases. This study constitutes the first report that Rhodiola extracts exhibit anti-depressive potency in patients with mild to moderate depression.