International journal of sports and exercise medicine最新文献

{"title":"Match Running Performance and Positional Demands of a U9 Female Soccer Team Competing in a Parks and Recreation-Sponsored League","authors":"DeWeese Brad H., Sausaman Robert W., Sams Matt L., Spalding Joanne","doi":"10.23937/2469-5718/1510179","DOIUrl":"https://doi.org/10.23937/2469-5718/1510179","url":null,"abstract":"The purpose of this study was to describe the match play characteristics of female youth-athletes participating in recreation league U9 soccer via wearable Global Positioning System (GPS) technology. Nine female youth soccer athletes (8.6 ± 0.9 years; all with 3-4 years of playing experience) were monitored during the study period. The athletes participated in approximately 2.5 hours of soccer-related training per week and two 48-minute 9v9 matches per week. The athletes were classified as Forwards (FWD), Midfielders (MID), or Defenders (DEF) by the coaching staff at the beginning of the spring season with 139 games analyzed. Estimated means for total distance, maximum velocity, sprinting, accelerations, and decelerations were 2943 [2715, 3171], 5.57 [5.36, 5.78], 3 [1, 8], 381 [336, 433], and 385 [345, 430], respectively. A statistically significant effect for playing position was found for total distance (p = 0.002), while no statistically significant fixed effect was present for maximum velocity (p = 0.301). Playing position did not have a statistically significant effect on sprints (p = 0.063), whereas statistically significant effects were present for both accelerations (p = 0.003) and decelerations (p < 0.001). U9 female soccer players at the recreational level suggest that players cover an average total distance of 2943m per match. Current investigation observed U9 female players attained maximal running velocities ranging from 5.17-5.85 m/s and experienced nearly 770 change of speed events per match, averaging 381 acceleration events and 385 deceleration events. This information may help sport practitioners develop age-specific training programs with a priority on long-term development.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88587602","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":"Intense Endurance Exercise: A Potential Risk Factor in the Development of Heart Disease","authors":"Rajanayagam Jocelynn, Alsabri Mohammed","doi":"10.23937/2469-5718/1510178","DOIUrl":"https://doi.org/10.23937/2469-5718/1510178","url":null,"abstract":"Background: Exercise is known to improve cardiac health; however, the upper limit of exercise is not as clear. High intensity endurance exercise and its association with cardiac dysfunction is becoming more important as more people in the USA participate in endurance activity. Hypothesis: Intensive endurance exercise is associated with heart disease. Methods: Peer-reviewed primary literature related to endurance exercise, cardiac remodelling, myocardial fibrosis, and arrhythmia was searched and selected from PubMed Database to be reviewed. Results: Increased cardiac remodelling, myocardial fibrosis, and arrhythmias were associated with increased endurance exercise in most instances. Clinically significant dysfunction from endurance exercise induced cardiac remodelling and myocardial fibrosis is not certain. However, increased incidence of SND and atrial flutter in endurance athletes, even after deconditioning, seems to be most associated with endurance exercise. Conclusion: Cardiac remodelling, fibrosis, and arrhythmia were associated with cardiac dysfunction. All review articles in this study were limited by low sample size since it was difficult to obtain full record of previous endurance activity. The reversibility of cardiac changes needs to be further investigated and can be applied in the differential diagnosis of other cardiomyopathies. The interaction between performance enhancing drugs and endurance exercise needs to be further studied to determine its action on cardiac health. Findings from these studies could contribute to exercise recommendations.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87774961","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":"Inactivity during COVID-19 Quarantine and its Effects in Strength and Functional Parameters in Elderly: A Case-Study","authors":"Camargo Júlio Benvenutti Bueno de, Filho Rubem Machado, Brigatto Felipe Alves, Batista Danilo Rodrigues, B. Henrique, Businari Guilherme Borsetti, Rosolem Jhenipher Moniky, Zaroni Rafael Sakai, Murer Evandro, Fioravante Gustavo Zorzi, Correa Daniel Alves, Jeronimo Diego Pereira, M. Anderson, Germano Moises Diego, Dias Wellington Goncalves, F. Ramos, Col Luan Oenning, Braz Tiago Volpi","doi":"10.23937/2469-5718/1510180","DOIUrl":"https://doi.org/10.23937/2469-5718/1510180","url":null,"abstract":"Background: Coronavirus 2019 (COVID-19) may be defined as a disease with pandemic characteristics. Although social distance may be able to combat the spreading of the virus, negative repercussions in general population ́s health may occur, especially in older people. Then, the aim of the present case-study was to assess the effects of a 6 month-detraining period in strength and functional parameters of a previously strength-trained elderly woman. Methods: Lower limbs maximal strength (one maximum repetition test [1RM]), timed-up and go (TUG) and Sit to Stand (STS) tests were performed pre and post the inactivity period. Results: Relevant reductions in 1RM (-25.9%) and in the number of repetitions performed in STS (-28.5%) were observed. In addition, the performance in TUG (+30.5%) was also impaired after the detraining phase. Conclusion: In conclusion, physical inactivity during the COVID-19 quarantine induced important reductions in strength and functional parameters in the elderly participant. Then, it can be recommendable that older people initiate or maintain their RT practices even at home during this period in order to maintain optimal general health and quality of life. ISSN: 2469-5718 DOI: 10.23937/2469-5718/1510180 • Page 2 of 4 • Camargo et al. Int J Sports Exerc Med 2020, 6:180 the study. Also, the participant was free from any muscle or skeletal injury and negatively responded all the questions in the PAR-Q. Before initiating the study, the participant was informed about all the details and procedures adopted during the study, read and signed a consent form. In addition, the voluntary was also familiarized with the testing procedures. The study followed all the norms of the Brazilian National Health Council (CNS), according to the 510/2016 resolution.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"178 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77800718","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":"Acute Compartment Syndrome in the Anabolic Steroid using Bodybuilder: A Case Report","authors":"Ferreira Eduardo Freitas, Dantas Barbara, Portugal Diogo, S. Nuno, Peixoto Catarina, L. Andre, Vera-Cruz Carla","doi":"10.23937/2469-5718/1510181","DOIUrl":"https://doi.org/10.23937/2469-5718/1510181","url":null,"abstract":"Anabolic steroids are frequently used by bodybuilders in order to achieve a rapid increase in muscle mass and strength. However, this practice may be associated with several complications including a compartment syndrome. A 19-year-old male bodybuilder presented to the emergency department with a lower right leg anterior non-traumatic compartment syndrome associated with a footdrop. He had been using daily anabolic-androgenic steroids for the past 12 weeks. Emergency fasciotomy was done and the patient initiated rehabilitation. Muscles undergoing rapid hypertrophy within a less elastic fascia, as the result of exercise and anabolic steroids, may be more susceptible to compartment syndromes. Increased intra-compartimental pressure originates myocyte necrosis and nerve injury. Thus, in order to preserve muscle and nerve integrity, an emergency fasciotomy in necessary. Steroid acquisition is done over the internet or the black market with little control or regulation. Hence, a greater awareness of this problem and acquisition control is mandatory.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86877895","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":"A Comparative Study on the Physical Quality (Lower Body Strength and Endurance) of Boys Under-17 Youth Football Development Project and Non-Athletes of the Same Age Group: The Case of Debre Markos Town","authors":"Bitew Fenta","doi":"10.23937/2469-5718/1510173","DOIUrl":"https://doi.org/10.23937/2469-5718/1510173","url":null,"abstract":"Professional spends more time and efforts for improvement of athletic performance. The study was conducted for the comparison of physical qualities (lower body strength and endurance) of boys under-17 youth football development project participants and non-participants of the same age group at Debre Markos town. The research design was cross-sectional survey. The researcher selected 25 project participants by using simple random sampling and 25 non-athletes by using purposive sampling technique. The result of the test shows that project participants were better than non-participants in all three tests. Five football project participants squat test score found in average must do improve their lower body strength and 12-munits run test score found in marginal zone must do endurance activity. Five football project participants step test score found in above average score must do endurance activity.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88119379","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 Significance of Early Repolarization and Incomplete Right Bundle Block in Athletes","authors":"R. Samir","doi":"10.23937/2469-5718/1510168","DOIUrl":"https://doi.org/10.23937/2469-5718/1510168","url":null,"abstract":"Background: Sudden death in athletes is a major concern; the predictors remain to be settled. The significance of early repolarization is the subject of this work. Methods: The study included hundred persons engaged in competitive sports for duration not less than 6 months; with training at least 3 days per week and at least two hours per day. All were males. Full history especially questioning for syncope, tachycardias or chest pain was obtained as well as family history of sudden death or coronary disease. ECG was done for all plus echo Doppler in some cases. Early repolarization was accepted present if J point is elevated more than one mm in LII, III, aVF or in chest leads, with or without raised ST > 1 mm. RV conduction disturbance was considered present if there is Rsr’ or bifid R. 54 played isotonic sport while 46 were on isometric sport. Types of sports: 46 isometric (static) (body builders). Isotonic (dynamic) 54 (Bicycling 6, Football 15, Tennis 3, Basketball 16, Volleyball 8, Swimming 4, Boxing 2). Results: Early repolarization was found in 5 and Rsr’ were present in 14 subjects, (2 had both). None was diagnosed as Brugada or RV dysplasia. Echo was done in 15 who showed ECG increased voltage, increase in LV size was found in 5 (Diastolic diameter up to 61 mm). 10 persons were re-examined after months, no abnormal events were found. Follow up by telephone was up to one year. No one reported tachyarrhythmia or syncope neither before recruitment in the study (retrospective) or after follow-up (prospective). Conclusion: Early repolarization and RV conduction disturbance in athletes apparently did not prove to be hazardous. Further studies are needed.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80397767","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":"Characterizing Relationships with Exercise Partners: Communication, Closeness, and Performance","authors":"C. Hill, Emery J. Max, G. M. Wittenbaum, D. Feltz","doi":"10.23937/2469-5718/1510167","DOIUrl":"https://doi.org/10.23937/2469-5718/1510167","url":null,"abstract":"Social influence research in exercise has highlighted the motivation-boosting potential of working out with an exercise partner or group, but to the authors’ knowledge there has been no research to date characterizing the typical dyadic exercise relationship, which is an interpersonal relationship that includes regular co-exercise. If exercise partners are motivational, then characterizing their relationship is important. A sample of 555 undergraduates were administered a survey, 383 of whom met inclusion criteria and reported having or having had an exercise partner. Participants (77%) reported that their exercise relationships typically emerged out of previously existing relationships. Participants reported (on a 1-7 Inclusion of Other in Self Scale) that they were very close with their exercise partners (M = 5.07 + 1.56) and that (out of 10 discussion topic categories) they talked about a number of topics outside of exercise (M = 6.53 + 2.50) and during typical workouts (M = 4.21 + 2.69). Exercise dyadic relationships were characterized by mutual goal facilitation, and participants whose exercise relationships had dissolved or failed reported significantly lower interpersonal closeness, lower communication breadth, and more performance-based goals than participants who reported an ongoing exercise relationship (ps < 0.05). Participants exercised more often the more an exercise relationship was defined by exercise (p < 0.05), suggesting that exercise relationships that revolved around exercise were more immediately productive than exercise relationships that did not prioritize exercise.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"228 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90935703","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 Aerobic Exercise on Sleep and Salivary Melatonin in Men","authors":"M. PobocikKaylee, Rentzell Seth A Von, J. LeonardAbigail, N. DayeAmber, S. EvansElizabeth","doi":"10.23937/2469-5718/1510161","DOIUrl":"https://doi.org/10.23937/2469-5718/1510161","url":null,"abstract":"Background: Insomnia is a sleep disorder that affects ap proximately 50-70 million US adults. Previous studies have examined the impact of exercise as a non-pharmacologic mechanism for improving sleep and reducing insomnia. The body’s melatonin secretion is considered an internal sleep regulator (as opposed to external sleep regulators such as medications) and may be improved by regular exercise. Therefore, the purpose of this study was to evaluate the ef fect of an 8-week aerobic exercise intervention on nighttime salivary melatonin concentrations and self-reported sleep quality in a cohort of adult men. Methods: Utilizing an experimental pre-test post-test de -sign, 17 previously sedentary men ages 18-44 years com pleted 8 weeks of moderate-intensity aerobic exercise. Sleep Quality and was assessed pre-intervention and post-inter vention using the Pittsburgh Sleep Quality Index (PSQI). Salivary melatonin concentrations were assessed pre-inter vention, mid-intervention, and post-intervention at 20:00h, 22:00h, and 03:00h using Enzyme-Linked Immunosorbent Assay (ELISA) techniques. Paired sample t-tests were used to compare changes in PSQI scores from pre-intervention to post-intervention, as well as to compare salivary concen trations at 20:00h, 22:00h, and 03:00h during the pre-inter vention, mid-intervention, and post-intervention collections. Results: PSQI scores significantly decreased from pre-in tervention to post-intervention, indicating significant im provement in sleep quality (p = 0.046). Salivary melatonin concentrations increased significantly from pre-intervention to post-intervention at 20:00h, as well as from 20:00h to 3:00h within the post-intervention collection period (p 0.015-0.037). Conclusions: Moderate aerobic exercise may increase the production of nighttime melatonin, thus improving inter nal sleep regulation and positively impacting sleep quality in previously sedentary adult men. Individuals with sleep problems may consider using exercise to improve aspects of sleep.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"21 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72627610","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":"Validity of Two High-Incline VO2max Protocols for College-Aged Population","authors":"Lankford De, T BartschiJake, Huntsman Keegan, Gidley Lex, Hook Tyler, Wu Yilin","doi":"10.23937/2469-5718/1510150","DOIUrl":"https://doi.org/10.23937/2469-5718/1510150","url":null,"abstract":"Purpose: The aim of the study is to validate two high-incline Graded Exercise Tests (GXT) that could be used as alternatives to the Bruce protocol to obtain VO2max values for college-aged individuals who may not be accustomed to running on a treadmill. Methods: Subjects (n = 42, male = 25, female = 17, age = 23.2 ± 2.6 years) completed the Bruce protocol as well as two high-incline GXTs (5-5, 10-5) in a randomized order. Both high incline VO2max tests were performed at a constant speed of 3.6 mph and increased in incline of 5% every 3-minutes until volitional exhaustion. The 5-5 began with a 5% grade, while the 10-5 began with a 10% grade. Outcome measurements of VO2max were compared using a 1 x 3 repeated measures ANOVA. Pearson Correlation and Bland-Altman plots were used to analyze relationships between the two high-incline tests and the Bruce protocol individually. Results: No differences in VO2max was found between tests (Bruce = 45.99 ± 7.57 ml∙kg-1∙min-1, 5-5 = 44.97 ± 7.71 ml∙kg-1∙min-1, 10-5 = 43.99 ± 8.01 ml∙kg-1∙min-1, p > 0.05). VO2max of the Bruce protocol was strongly related to both 5-5 (R = 0.95) and 10-5 (R = 0.91) tests. Bland-Altman plots between the 5-5 test and the Bruce protocol revealed 93% of data falls within ± 4.5 ml∙kg-1∙min-1 of the arbitrary accepted range. For comparison between 10-5 and Bruce, variability increased as only 79% of the data fell within the same arbitrary range. Conclusion: Results suggest that the 5-5 test is a valid alternative to the Bruce protocol. Additionally, the current study demonstrates that a non-running GXT is effective in determining VO2max in a relatively healthy, college-aged population.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79139135","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 Concurrent Exercise Order (Resistance and Endurance) on Lipid Profile, Leptin Serum and Insulin Resistance Index in Overweight Women","authors":"Hakimi Mehdi, A. Maryam","doi":"10.23937/2469-5718/1510149","DOIUrl":"https://doi.org/10.23937/2469-5718/1510149","url":null,"abstract":"Purpose: The purpose of this study was the effect of concurrent exercise order on lipid profile, leptin serum and insulin resistance index in non-athlete overweight women. Methods: Thirty female students (age = 23.2 ± 2.4 year, BMI = 27.87 ± 1.3 kg/m2) volunteered to participate in this study and were randomly divided into three groups of 10 people taking the Concurrent Endurance-Resistance (CER), Concurrent ResistanceEndurance (CRE) and Control (C). Two exercise groups performed the same concurrent exercise, but the order of endurance and resistance exercise were different in two groups. Fasting blood samples were collected before and after completion of the exercise. The paired sample t-test was used to determine differences within a group, and variation between groups analysis of variance (ANOVA) and LSD were used. Results: The implementation of a concurrent exercise session in two exercise groups except for the indicators of HDL that there was no significant change, caused to significantly decreases in TC, TG, LDL, insulin, insulin resistance indices and leptin serum that this rate of changes was significant compared with the control group. But no significant difference was observed between implementation of two methods of concurrent exercise. In addition, the control group did not change significantly in none of the variables. Conclusion: Although the implementation one session of a combination of resistance and endurance exercise improves lipid profile, insulin resistance index and leptin serum but the effectiveness of two methods of concurrent endurance-resistance and resistance-endurance were similar.","PeriodicalId":91298,"journal":{"name":"International journal of sports and exercise medicine","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89063728","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}