Sports medicine: research and practice最新文献

{"title":"Response of cardiorespiratory system during maximal exercise cycle ergometer test in women cross-country skiers with different skills levels","authors":"I. Garnov, T. Loginova, E. Boyko","doi":"10.47529/2223-2524.2023.3.6","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.6","url":null,"abstract":"Objective: to estimate the functional features of the cardiorespiratory system of female cross-country skiers with different skills levels at the maximal bicycle ergometer test.Material and methods: 70 female cross-country skiers were divided into three groups. The first group included 21 cross-country skiers with first adult sporting rank, the second — 25 candidates in master of sports, the third group — 24 sport masters in cross-country skiing. Maximal exercise tests were used to determine cardiorespiratory fitness via spiroergometric system «Oxycon Pro» (Jaeger, Hoechberg, Germany).Results: The most notable differences were observed between the first-class and the masters of the sports groups. In the first-class group the heart rate during the maximal exercise test was, on average, 11 beats/min higher than in the master of sports group (p<0.05), and the oxygen consumption at the anaerobic threshold was, on average, lower by 7.7 ml/min/kg (p < 0.05) when comparing the same groups.Conclusion: The influence of skills levels on physiological parameters at maximal bicycle ergometer test was shown. The capacity in the first group occurs due to cardiovascular system tension, and the same in the group high qualification skiers happen due to the mechanisms of oxygen transport development.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Practical recommendations for safe reduction of body weight in combat sports: scoping review","authors":"A. G. Antonov, P. D. Rybakova, V. D. Vybornov, A. Miroshnikov, R. Khanferyan, M. Korosteleva","doi":"10.47529/2223-2524.2023.3.7","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.7","url":null,"abstract":"The presence of weight categories in martial arts requires an athlete to constantly maintain and control body weight and, in some cases, to reduce it. For this reason, it is common among martial artists to use forced methods of body weight reduction, which are often unphysiological and may have a negative impact on performance, as well as pose a danger to health. In this connection, it is of practical interest to search, analyse and introduce into practice physiological and safe methods of body weight reduction by athletes-athletes before participation in competitions. The aim of the study is to evaluate the safety and effectiveness of various methods of weight loss in athletes preparing to participate in competitions.Materials and methods: the review was conducted according to the methodology of Scoping review. Articles were selected in the domestic data-bases eLibrary and Russian State Library, using the following keywords: «методы снижения массы тела ИЛИ снижение массы тела ИЛИ весогонка» И «единоборства ИЛИ боевые виды спорта», as well as in the foreign databases ScienceDirect and PubMed, using the following keywords: «making weight OR weight loss» AND «combat sports», placed in a search depth of 15 years.Results: we found 121 studies, 3 duplicates were excluded after initial screening, 118 studies were screened for inclusion criteria, and a total of 16 studies were included in the review.Conclusion: a reduction of 5 to 10 % of body weight less than 7 days before the official weigh-in may adversely affect performance parameters and the state of the body’s functional systems. A reduction of up to 5 % of body weight 7 or more days before the official weigh-in is the safest.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139179767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Jump-to-Box exercise has an increasing effect on jumping ability in adolescents","authors":"H. Padang, Y. Ramba, .. Arpandjam’an, G. Kapoor","doi":"10.47529/2223-2524.2023.3.8","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.8","url":null,"abstract":"Aim: To determine the most effective dose of the box jump exercise for increasing explosive leg muscle strength in adolescents, as measured by vertical jump height.Methods: This study is a field experimental study using a randomized control group pretest-posttest design by providing different doses of jump-to-box exercise. The experiment was conducted on Buqa’tum Mubarakah Junior High School students in Makassar, Indonesia, on February 16 to August 16, 2022 and obtained a total sample size of 60 male subjects aged 15-16 years. The participants were randomly divided into four experimental groups, each consisting of 15 people who were given jump-to-box exercises with different doses.Results: The results of the ANOVA test analysis showed that training with a loading dose of 24 cm and 5 minutes duration had a significant effect on increasing leg muscle explosive power with a p-value = 0.005. The other three groups did not show statistically significant improvements in jump height.Conclusion: The jump-to-box exercise with the box height of 24 cm and training duration of 5 minutes resulted in the highest average vertical jumping ability compared to other dose groups. This exercise protocol has an optimal effect on vertical jumping ability and limb explosive power in adolescents compared to other protocols.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139180999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in the oxidative-antioxidant status of blood in freestyle wrestlers under the influence of physical exertion","authors":"N. Kurashova, A. A. Yureva, I. Gutnik, L. Grebenkina, A. Labygina, L. Kolesnikova","doi":"10.47529/2223-2524.2023.3.9","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.9","url":null,"abstract":"Purpose of the study: to evaluate the “lipid peroxidation-antioxidant protection” system in freestyle wrestlers under the influence of intense physical activity in order to identify the nature of oxidative processes and the antioxidant status of the athletes’ body.Materials and methods: the study involved athletes — freestyle wrestlers, boys 18–22 years old, with sports qualifications: candidate master of sports or master of sports, regularly involved in freestyle wrestling. The control group consisted of students who did not have a sports category and were not involved in sports activities, comparable in gender, age, weight category with the comparison group.  The material for the study was plasma and red blood cells. Blood sampling from athletes was carried out twice, at the end of the preparatory and competitive periods, in the morning, on an empty stomach from the ulnar vein, in accordance with generally accepted requirements. Components of lipid peroxidation and antioxidant defense were determined using spectrophotometric and fluorometric methods.Results: it was found that in athletes after intense physical activity (competitive period), there is a significantly significant decrease in substrates with double bonds by 61 %, primary products by 59 % and intermediate products by 44 %, an increase in the final products of lipid peroxidation by 25 % against the background of inhibition activity of antioxidant protection components: retinol by 40 %, superoxide dismutase by 7 % and reduced glutathione by 11 %.Conclusion: The level of free radical processes increases during physical activity due to the accumulation of oxygen in organs and tissues, and depends on the intensity and duration of the exercise. In the course of the study, it was established that the preparatory and competitive periods, in comparison with the control group, among freestyle wrestlers, depending on the previous level of physical activity, are characterized by activation of lipid peroxidation processes and inhibition of enzymatic and non-enzymatic components of antioxidant protection. The established changes are recommended to be taken into account when conducting comprehensive rehabilitation of athletes, when developing recommendations for improving the training process, as well as when using antioxidant complexes for athletes aimed at restoring various parts of the body’s antioxidant defense.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139183055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of voluntary hypoventilation in yoga breathing exercises on gas exchange and EEG activity in healthy trained subjects","authors":"A. V. Frolov, J. A. Boytsova, S. Ermolaeva, M. D. Didur","doi":"10.47529/2223-2524.2023.3.5","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.5","url":null,"abstract":"Objective: to assess the effect of voluntary hypoventilation during yoga breathing exercises on gas exchange and EEG activity in a group of healthy, trained practitioners.Materials and methods: 25 volunteers (21 men and 4 women, average age 42.96 ± 9.19 years) performed hypoventilation yoga exercises with a decrease in respiratory rate to 1–1.5 times/minute. Registration of respiratory rate, tidal volume and minute volume of breathing, gas analysis of exhaled air (PetCO2, FeO2) and spectral analysis of electroencephalogram (EEG) in gICA model were carried out during breathing with a frequency of 1–1.5 times/minute and during relatively free breathing with mental calculation.Results: Breathing with a frequency of 1–1.5 times/minute causes a decrease in minute volume of breathing, the development of alveolar hypoxia and hypercapnia, which leads to an increase in the power of some local components in the slow delta, theta and alpha EEG bands. In addition, breathing with a frequency of 1–1.5 times/minute is accompanied by a decrease in the alpha- and beta-power of some components, the sources of which are located in the motor areas of the cortex, but is also accompanied by an increase in the power of components with widespread scalp topography in beta and gamma bands.Conclusion: Voluntary hypoventilation during yoga breathing exercises leads to the development of alveolar hypoxia and hypercapnia, accompanied by an increase in the power of local components in the slow EEG bands. At the same time, the alpha and beta powers of components localized in the motor areas of the cortex decrease, which may be a consequence of muscle tension during slow breathing.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139185313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of walking in an exoskeleton on rehabilitation of patients with spinal cord injury consequences","authors":"M. A. Gvozdareva, L. A. Shpagina, N. P. Kareva, E. V. Kuropatova, V. Rerikh","doi":"10.47529/2223-2524.2023.3.2","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.2","url":null,"abstract":"Objective: to substantiate the expediency of including training walking in an exoskeleton in the complex rehabilitation of patients with severe motor dysfunctions of the lower limbs due to spinal cord injury (SCI).Methods: 120 patients (84 men and 36 women, age 37.1 ± 8.40 years) with the consequences of SCI at the level of thoracic and lumbar spine who were in the hospital at the second stage of medical rehabilitation were examined. The duration of injury ranged from 1 year to 19 years (77.8 ± 4.05 months). All patients were divided into two groups (80 and 40 patients), comparable by sex, age, duration and severity of injury. Training walking in exoskeleton have been added in the group I rehabilitation program. ASIA, SCIM III scales and SF-36 quality of life questionnaire were used to evaluate the effectiveness of the rehabilitation measures.Results: there was an increase in the total score on SCIM III by 3.20 ± 0.50 (p = 0.05) in group I, which indicates an increase in the level of functioning and daily activity of patients. Positive dynamics was revealed when assessing the quality of life using SF-36 questionnaire: sum index reflecting the psychological component of health increased from 56,0 to 59,5 points (p = 0,05). Group II also showed positive dynamics of the analyzed indicators, but the changes by the end of the rehabilitation course were not statistically significant.Conclusion: the use of exoskeleton training walking at the second stage of medical rehabilitation increases the effectiveness of rehabilitation measures and improves the quality of life of patients with severe motor dysfunctions of the lower limbs due to spinal cord injury (SCI).","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139254558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the “core stability” tests results among elite athletes","authors":"R. I. Aliev","doi":"10.47529/2223-2524.2023.3.3","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.3","url":null,"abstract":"Objective: to compare the results of endurance, strength and functional status of spine stabilisers muscles (core stability) obtained by testing national teams athletes of different sports.Materials and methods: 71 male athletes (judokas, boxers, cyclists and wrestlers) aged 18–25 years participated in this study. Athletes were asked to perform «Motor Control test» in static and dynamic mode and three trial attempts were given to be familiar with test.Results: cyclists were found to have the highest overall scores in both static and dynamic modes, but the results for different spatial parameters differ. Statistically significant differences were found when comparing the following core stability indicators: «Forward (static mode)», «Back (dynamic mode)», «Left (static mode)», «Forward-left (static mode), «Forward-right (dynamic mode)», «Back-left (static mode)», «Back-left (dynamic mode)», «Back-right (dynamic mode)».Conclusion. The cycling requires more core stability than boxing, wrestling and judo, but further investigations and larger samples of athletes are needed.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139255668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dependence of the severity of pain in the lower back and degenerative changes in the lumbar spine in skydivers depending on the experience of training","authors":"A. S. Arapov, A. L. Gudim, M. V. Shpagin","doi":"10.47529/2223-2524.2023.3.4","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.3.4","url":null,"abstract":"Purpose of the study: to assess risk factors for the development of nonspecific back pain syndrome in skydivers.Materials and methods: A single-center, prospective, non-randomized study included 173 men aged 25 to 55 years who had been followed up with low back pain for 1 to 5 years. The main group included 89 people involved in parachuting (experience from 5 to 20 years, number of jumps — 276 (167; 387) times), the comparison group — 84 patients who had never jumped with a parachute. Depending on the total number of jumps, the main group was divided into 2 subgroups: less than 198 (n = 29) and more than 198 parachute jumps (n = 60). All patients underwent clinical neurological examination and magnetic resonance imaging (MRI) of the spine. MRI was used to quantify the presence of disc tissue displacements, the presence of straightening lordosis, and spondylolisthesis. Statistical processing of the obtained data was carried out using the IBM SPSS Statistics 25 program.Results: a correlation was established between the appearance of disc tissue displacement in the spine according to MRI and the number of parachute jumps in the main group (r = 0.430; p < 0.001). The indicated pathological changes in the spine in paratroopers occurred when the total number of jumps was 198 or more. Among parachutists of the main group, displacement of disc tissue in the spine correlated with the level of pain intensity (r = 0.337; p < 0.001) and the degree of functional impairment according to the results of the questionnaires Oswestry (r = 0.325; p < 0.001) and Roland Morris (r = 0.292; p < 0.001). The highest rate of pain syndrome and degree of disability was in the subgroup of paratroopers with extensive experience (p < 0.05), while other groups of patients had no differences in this indicator.Conclusions: in skydiving athletes, the intensity of pain in the lower back and the degree of degenerative-dystrophic changes depended on the number of parachute jumps.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139266028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cardiovascular Effects of Anabolic-Androgenic Steroids in Dietary Supplements","authors":"P. Van der Bijl, P. Van der Bijl (Jr)","doi":"10.47529/2223-2524.2023.2.11","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.2.11","url":null,"abstract":"Dietary supplements are regularly consumed by more than 70 % of the US population, as well as by competitive and non-competitive athletes. Anabolic-androgenic steroids (AAS) are frequently found in dietary supplements, and have the potential for multi-organ toxicity, including significant effects on the cardiovascular system. Cardiovascular toxicities of AAS include coronary artery effects, e.g. spasm, thrombosis and plaque rupture, leading to acute coronary syndromes and myocardial infarctions, as well as direct myocardial toxicity, causing left ventricular hypertrophy, fibrosis and dysfunction. Coronary and myocardial effects converge towards a common final pathway, causing heart failure, life-threatening arrhythmias and sudden cardiac death. The unregulated nature of AAS in dietary supplements has many ramifications. Both coaches and athletes should be aware that testing positive for a prohibited substance (including AAS) constitutes a potential doping violation. We advocate for improved education of the public at large regarding the potential for AAS to be included in dietary supplements, as well as its regulation by the appropriate authorities.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139279883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the transferred coronavirus infection on diseases of the endocrine system in athletes","authors":"E. Tenyaeva, E. A. Turova, V. A. Badtieva, E. O. Okonkwo","doi":"10.47529/2223-2524.2023.2.12","DOIUrl":"https://doi.org/10.47529/2223-2524.2023.2.12","url":null,"abstract":"Purpose: to study the effect of the transferred viral (on the example of COVID‑19) infection on the endocrine system of athletes.Materials and methods: the data of 1114 athletes (average age 22.23 ± 4.18 years) who underwent in‑depth medical examination in the period 2021–2022 were analyzed. The examination included an analysis of sports and infectious anamnesis, the results of hormonal, biochemical and instrumental studies.Results: coronavirus infection was suffered by the majority of athletes — 724 people (65 %) — in the vast majority of cases (91 %), their disease was asymptomatic or mild. 390 athletes (35 %) had no history of infection. There was a significant increase in the incidence of hypothyroidism, thyrotoxicosis, insulin‑dependent diabetes mellitus, autoimmune thyroiditis among athletes who had a coronavirus infection when compared with athletes who were not ill. The development of endocrine diseases did not depend on the severity of the infection and was most often detected with its mild and asymptomatic course. During the examination, six cases of newly diagnosed type 1 diabetes mellitus and eight cases of thyrotoxicosis were detected among athletes who had a coronavirus infection. The development of these conditions did not depend on the severity of the infection. At the same time, only 1 case of thyrotoxicosis was registered in athletes who were not ill, no new cases of type 1 diabetes mellitus were diagnosed. In the present study, no association was found between the transmitted coronavirus infection and an increase in the number of cases of nodular goiter, hyperprolactinemia and type 2 diabetes mellitus.Conclusion: the results of the study showed that in the long‑term period after COVID‑19, autoimmune endocrine diseases, such as primary hypothyroidism, diffuse‑toxic goiter with thyrotoxicosis, autoimmune thyroiditis, type 1 diabetes mellitus, were significantly more often manifested in athletes, which is probably associated with a cross‑lesion of autoimmunity against a background of viral infection.","PeriodicalId":309619,"journal":{"name":"Sports medicine: research and practice","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139280069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}