BMC sports science, medicine & rehabilitation最新文献

{"title":"The impact of COVID-19 restrictions on Australians' frequency and duration of participation in different types of sport and physical activity.","authors":"Rochelle Eime, Jack Harvey, Melanie Charity, Aurelie Pankowiak, Hans Westerbeek","doi":"10.1186/s13102-022-00435-z","DOIUrl":"10.1186/s13102-022-00435-z","url":null,"abstract":"<p><strong>Background: </strong>Sports management and public health physical activity stakeholders need to understand changing patterns of participation to inform the development of sport and physical activity opportunities and strategies. This study investigated changes in the frequency and duration of participation in sport and physical activity in Australia from pre-COVID-19 to during-COVID-19, broken down by the specific type of activity and by gender, age and region.</p><p><strong>Methods: </strong>During the first pandemic restrictions and lockdowns in Australia in May-June 2020, 6140 survey respondents provided information about the types, frequency and duration of the sport and physical activity they participated in prior to and during COVID-19 restrictions. Differences between mean values were analyzed.</p><p><strong>Results: </strong>The greatest decline in participation during COVID-19 was in team sports, and the decline was greater for men than for women.</p><p><strong>Conclusion: </strong>How will sport respond to getting these men back in the game, and women back from home-based yoga and Pilates?</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"42"},"PeriodicalIF":2.8,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8935269/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40312486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mobile applications for the sport and exercise nutritionist: a narrative review.","authors":"Daniel J Peart,&nbsp;Marc A Briggs,&nbsp;Matthew P Shaw","doi":"10.1186/s13102-022-00419-z","DOIUrl":"https://doi.org/10.1186/s13102-022-00419-z","url":null,"abstract":"<p><p>Mobile technology is widespread in modern society, and the applications (apps) that they run can serve various purposes. Features such as portability, ease of communication, storage, and relative low cost may make such technology attractive to practitioners in several fields. This review provides a critical narrative on the existing literature for apps relevant to the field of sport and exercise nutrition. Three main areas are discussed: (1) dietary analysis of athletes, (2) nutrition education for athletes, (3) estimating body composition. The key purpose of the review was to identify what literature is available, in what areas apps may have a benefit over traditional methods, and considerations that practitioners should make before they implement apps into their practice or recommend their use to coaches and athletes.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"30"},"PeriodicalIF":1.9,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8862506/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39820049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Isokinetic muscle strength cannot be related to the odds ratio of musculoskeletal injuries in young elite wrestlers.","authors":"Alireza Hoseini,&nbsp;Mostafa Zarei,&nbsp;Hadi Nobari,&nbsp;Fariborz Hovanloo,&nbsp;Hamed Abbasi,&nbsp;Jorge Pérez-Gómez","doi":"10.1186/s13102-022-00423-3","DOIUrl":"https://doi.org/10.1186/s13102-022-00423-3","url":null,"abstract":"<p><strong>Background: </strong>Wrestling is considered one of the oldest sports in the world. There is a high rate of injuries in Wrestling. To prevent injuries, it is necessary to identify the risk factors. Despite the functional importance of strength in wrestling, few studies have investigated the relationship between isokinetic strength and the rate of injuries in the sport.</p><p><strong>Objectives: </strong>The objective of the present study was to investigate the relationship between the isokinetic strength of elite wrestlers and the rate of injuries prospectively.</p><p><strong>Method: </strong>A total of 72 young wrestlers with at least 2 years of experience in the Tehran Wrestling Premier League participated in this study. Before the start of the competition season, the isokinetic strength of flexor and extensor muscles of the knee and shoulder were measured at different velocities by an isokinetic dynamometer. The injuries and training hours of these wrestlers were then recorded for nine months.</p><p><strong>Results: </strong>The study results showed no significant relationship between isokinetic strength of flexor and extensor muscles of the knee or shoulder at different angular speeds of 60, 180, and 300°/s. There was neither significant between the ratio of the strength flexor/extensor for knee and/or shoulder in young elite wrestlers with injuries.</p><p><strong>Conclusion: </strong>Isokinetic strength of lower and upper limb muscles alone cannot predict wrestlers' injuries. Therefore, the use of these tests is not recommended to evaluate the risk of injury in this population.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"29"},"PeriodicalIF":1.9,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8862385/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39944787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The prevalence of chronic ankle instability in basketball athletes: a cross-sectional study.","authors":"Chiao-I Lin,&nbsp;Frank Mayer,&nbsp;Pia-Maria Wippert","doi":"10.1186/s13102-022-00418-0","DOIUrl":"https://doi.org/10.1186/s13102-022-00418-0","url":null,"abstract":"<p><strong>Background: </strong>Ankle sprain is the most common injury in basketball. Chronic ankle instability develops from an acute ankle sprain may cause negative effects on quality of life, ankle functionality or on increasing risk for recurrent ankle sprains and post-traumatic osteoarthritis. To facilitate a preventative strategy of chronic ankle instability (CAI) in the basketball population, gathering epidemiological data is essential. However, the epidemiological data of CAI in basketball is limited. Therefore, this study aims to investigate the prevalence of CAI in basketball athletes and to determine whether gender, competitive level, and basketball playing position influence this prevalence.</p><p><strong>Methods: </strong>In a cross-sectional study, in total 391 Taiwanese basketball athletes from universities and sports clubs participated. Besides non-standardized questions about demographics and their history of ankle sprains, participants further filled out the standard Cumberland Ankle Instability Tool applied to determine the presence of ankle instability. Questionnaires from 255 collegiate and 133 semi-professional basketball athletes (male = 243, female = 145, 22.3 ± 3.8 years, 23.3 ± 2.2 kg/m²) were analyzed. Differences in prevalence between gender, competitive level and playing position were determined using the Chi-square test.</p><p><strong>Results: </strong>In the surveyed cohort, 26% had unilateral CAI while 50% of them had bilateral CAI. Women had a higher prevalence than men in the whole surveyed cohort (X²(1) = 0.515, p = 0.003). This gender disparity also showed from sub-analyses, that the collegiate female athletes had a higher prevalence than collegiate men athletes (X²(1) = 0.203, p = 0.001). Prevalence showed no difference between competitive levels (p > 0.05) and among playing positions (p > 0.05).</p><p><strong>Conclusions: </strong>CAI is highly prevalent in the basketball population. Gender affects the prevalence of CAI. Regardless of the competitive level and playing position the prevalence of CAI is similar. The characteristic of basketball contributes to the high prevalence. Prevention of CAI should be a focus in basketball. When applying the CAI prevention measures, gender should be taken into consideration.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"27"},"PeriodicalIF":1.9,"publicationDate":"2022-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8857785/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39811276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between matrix metalloproteinase-3 gene polymorphisms and tendon-ligament injuries: evidence from a meta-analysis.","authors":"Rui Guo,&nbsp;Aihaiti Aizezi,&nbsp;Yong Fan,&nbsp;Zhe Ji,&nbsp;Wenzong Li,&nbsp;Yongxian Li,&nbsp;Zhigang Wang,&nbsp;Kai Ning","doi":"10.1186/s13102-022-00421-5","DOIUrl":"https://doi.org/10.1186/s13102-022-00421-5","url":null,"abstract":"<p><strong>Background: </strong>Tendon-ligament injuries (TLIs), including Achilles tendinopathy, cruciate ligament injury, tennis elbow, rotator cuff injury, patellar tendinopathy, and tibial tendinopathy, are common musculoskeletal soft injuries during physical activity. Matrix metalloproteinase-3 (MMP-3) gene polymorphisms have been implicated in the etiology of TLIs in several genetic association studies with inconsistent results. The purpose of this study was to collect and synthesize the current evidences on the association of MMP-3 polymorphisms and TLIs.</p><p><strong>Methods: </strong>The search was conducted using PubMed, Web of Science, EMBASE, Cochrane Library, CNKI and Wanfang databases, prior to July, 2021. Newcastle Ottawa Scale was used to appraise the study quality. Strengths of association were represented by odds ratios (ORs) and 95% confidence intervals (95% CIs).</p><p><strong>Results: </strong>Thirteen studies with 2871 cases and 4497 controls met the eligibility criteria, and each study was in high quality. The overall analyzes suggested rs3025058 was associated with an increased TLIs risk (5A vs. 6A, OR = 1.20, 95% CI 1.03-1.40, P = 0.020). However, the association was not found for rs679620, rs591058, and rs650108 polymorphisms. Subgroup analysis by injury type suggested that rs679620 polymorphism was associated with a reduced risk to Achilles tendon rupture (AA + AG vs. GG, OR = 0.46, 95% CI 0.25-0.87, P = 0.020), and rs3025058 was associated with an elevated risk to anterior cruciate ligament injury (5A5A + 5A6A vs. 6A6A, OR = 1.46, 95% CI 1.03-2.06, P = 0.030). When stratified by ethnicity, the findings indicated that rs3025058 polymorphism was associated with an increased TLIs risk among Caucasians (5A6A vs. 6A6A, OR = 1.55, 95% CI 1.09-2.42, P = 0.020) and Brazilians (5A5A vs. 5A6A + 6A6A, OR = 2.80, 95% CI 1.44-5.45, P = 0.002).</p><p><strong>Conclusion: </strong>Findings of this study suggest that rs679620 polymorphism is associated with a reduced Achilles tendon rupture risk, and rs3025058 polymorphism contributes to an increased TLIs risk in Caucasians and Brazilians. However, rs591058 and rs650108 polymorphisms do not show any association with TLIs.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"26"},"PeriodicalIF":1.9,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8851795/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39637538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effects of learning with various noise on Gait Kinematics in 3-to-5-year-old children: a randomized controlled trial.","authors":"Maryam Ghorbani,&nbsp;Rasoul Yaali,&nbsp;Wolfgang I Schöllhorn,&nbsp;Amir Letafatkar,&nbsp;Hassan Sadeghi","doi":"10.1186/s13102-022-00416-2","DOIUrl":"https://doi.org/10.1186/s13102-022-00416-2","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Background: &lt;/strong&gt;Lack of the neuromuscular control during locomotion in the knee joint leads to an increased risk of anterior cruciate ligament (ACL) injury in children. Hence, we aimed to explore the effects of a repetitive, model-oriented, and self-organized approach on lower limb kinematics during gait in children.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;In randomized controlled trial, 36 children with 4 ± 0.79 years of age from the children gym were randomly (a lottery method) allocated into three groups, including (1) the model-oriented (n = 10), (2) Differential Learning (n = 11), and (3) control (n = 10) groups. Kinematic data of hip, knee, and ankle joints in the sagittal plane were recorded by a GoPro camera at the moments of heel-ground contact and toe-off the ground before and after a 6-week intervention (two sessions per week).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;The results indicate a 35% post-intervention increase of ankle dorsiflexion (95% CI: - 5.63 _ - 0.96) in the moment of heel-ground contact in the model-oriented group; however, knee flexion (95% CI: - 1.05 _ 8.34) and hip flexion (95% CI: 3.01 _ 11.78) were respectively decreased by 20% and 20%. After the intervention, moreover, ankle plantar flexion (95% CI: - 9.18 _ - 2.81) and hip extension (95% CI: - 12.87 _ - 3.72) have respectively increased by 37% and 37%, while knee flexion (95% CI: 3.49 _ 11.30) showed a %16 decrease in the moment of toe off the ground. As for the Differential Learning group, ankle dorsiflexion (95% CI: - 5.19 _ - 1.52) increased by 33%, and knee (95% CI: 0.60 _ 5.76) and hip flexion (95% CI: 2.15 _ 7.85) respectively decreased by 17% and 17% at the moment of the heel-ground contact following the intervention. At toe lifting off the ground, the plantar flexion (95% CI: - 7.77 _ - 2.77) increased by 35%, knee flexion (95% CI: 2.17 _ 7.27) decreased to 14%, and hip extension (95% CI: - 9.98 _ - 4.20) increased by %35 following the intervention for the Differential Learning group subjects. Based on the results obtained from the one-way ANOVA, there was a significant difference between these groups and the control group in all kinematic gait variables (p ≤ 0.05). However, no statistically significant differences were found between the two experimental groups.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;The results implied that the model-oriented repetitive and the self-organized Differential Learning approach were both appropriate to alter the kinematic gait pattern in the 3-5-year-old children. Previous research has almost exclusively recommended a model-oriented approach to change kinematic patterns and preventing non-contact motor injuries. However, the present study showed that the Differential Learning approach can help children to achieve the same goal by continuously changing environments and stimulating challenges.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Trial registration: &lt;/strong&gt;Current Controlled Trials using the IRCT website with ID number of, IRCT20130109012078N5 \"Prosp","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"25"},"PeriodicalIF":1.9,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8845401/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39924083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of wearable devices as a support strategy for maintaining physical activity after a structured exercise intervention for employees with metabolic syndrome: a randomized controlled trial.","authors":"Pauline Bayerle,&nbsp;Arno Kerling,&nbsp;Momme Kück,&nbsp;Simone Rolff,&nbsp;Hedwig Theda Boeck,&nbsp;Thorben Sundermeier,&nbsp;Ralf Ensslen,&nbsp;Uwe Tegtbur,&nbsp;Dirk Lauenstein,&nbsp;Dietmar Böthig,&nbsp;Christoph Bara,&nbsp;Alexander Hanke,&nbsp;Christoph Terkamp,&nbsp;Axel Haverich,&nbsp;Meike Stiesch,&nbsp;Martina de Zwaan,&nbsp;Sven Haufe,&nbsp;Lars Nachbar","doi":"10.1186/s13102-022-00409-1","DOIUrl":"https://doi.org/10.1186/s13102-022-00409-1","url":null,"abstract":"<p><strong>Background: </strong>Metabolic syndrome (MetS) is associated with an increased risk for cardiovascular events and high socioeconomic costs. Despite lifestyle interventions focusing on exercise are effective strategies to improve parameters of the above aspects, many programs fail to show sustained effects in the long-term.</p><p><strong>Methods: </strong>At visit 2 (V2) 129 company employees with diagnosed MetS, who previously participated in a 6-month telemonitoring-supported exercise intervention, were randomized into three subgroups for a 6-month maintenance treatment phase. A wearable activity device was provided to subgroup A and B to assess and to track physical activity. Further subgroup A attended personal consultations with individual instructions for exercise activities. Subgroup C received neither technical nor personal support. 6 months later at visit (V3), changes in exercise capacity, MetS severity, work ability, health-related quality of life and anxiety and depression were compared between the subgroups with an analysis of variance with repeated measurements.</p><p><strong>Results: </strong>The total physical activity (in MET*h/week) declined between visit 2 and visit 3 (subgroup A: V2: 48.0 ± 33.6, V3: 37.1 ± 23.0; subgroup B: V2: 52.6 ± 35.7, V3: 43.8 ± 40.7, subgroup C: V2: 51.5 ± 29.7, V3: 36.9 ± 22.8, for all p = 0.00) with no between-subgroup differences over time (p = 0.68). In all three subgroups the initial improvements in relative exercise capacity and MetS severity were maintained. Work ability declined significantly in subgroup C (V2: 40.3 ± 5.0, V3: 39.1 ± 5.7; p < 0.05), but remained stable in the other subgroups with no between-subgroup differences over time (p = 0.38). Health-related quality of life and anxiety and depression severity also showed no significant differences over time.</p><p><strong>Conclusions: </strong>Despite the maintenance of physical activity could not be achieved, most of the health related outcomes remained stable and above baseline value, with no difference regarding the support strategy during the maintenance treatment phase. Trial registration The study was completed as a cooperation project between the Volkswagen AG and the Hannover Medical School (ClinicalTrials.gov Identifier: NCT02029131).</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"24"},"PeriodicalIF":1.9,"publicationDate":"2022-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8829995/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39907046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Acute effects from the half-squat performed using a repetition versus differential approach in youth soccer players.","authors":"Diogo Coutinho,&nbsp;Eduardo Abade,&nbsp;Bruno Gonçalves,&nbsp;Sara Santos,&nbsp;Wolfgang Schöllhorn,&nbsp;Jaime Sampaio","doi":"10.1186/s13102-022-00413-5","DOIUrl":"https://doi.org/10.1186/s13102-022-00413-5","url":null,"abstract":"<p><strong>Background: </strong>Over the last years there have been a wide body of research exploring the best strategies to promote acute enhancements in players' performance. Despite that, most studies have been focused on adult and elite players, and different results may be identified when considering players from lower levels of performance and belonging to youth categories. In addition, most studies conducted in this domain focused in repetitive movement patterns, and while adding variability has been considered as a useful approach to enhance players' performance at short and long-term perspectives, less is known regarding it applicability to acute enhance players physical performance. Therefore, this study aimed to compare the acute enhancement effects of performing the half-squat in a flywheel ergometer between a more-repetitive approach (low noise) and a more variable approach (differential learning, high noise) in youth soccer players.</p><p><strong>Methods: </strong>A total of sixteen players (age = 16.2 ± 0.6 years) was exposed to four conditions in a randomized order: (1) repetitive intervention for 30 s; (2) repetitive intervention for 10-min; (3) differential learning intervention for 30 s; (4) differential learning intervention for 10-min. Each condition consisted in 3 sets of 6 repetitions of eccentric half squats performed in a flywheel ergometer. Countermovement jump, 10 m and 30 m linear sprint, and change-of-direction ability were measured every session at baseline (pre-test) and after each protocol (post-test).</p><p><strong>Results: </strong>No potentiation effect was observed overall with any of the interventions. In addition, no differences between protocols were found for sprinting. However, the repetitive intervention impaired jumping performance for both 30 s (small effects, p ≤ .05) and 10-min intervals (small effects, p ≤ .05), as well as in the change-of-direction task for 30 s (p ≤ .05).</p><p><strong>Conclusions: </strong>These results may be due to the players' low experience in eccentric flywheel training. Despite these findings, individual potentiation responses emerged from both protocols when considering the individual responses, reinforcing the need to establish more personalized approaches.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"23"},"PeriodicalIF":1.9,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8830118/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39903732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time-course effects of functional fitness sessions performed at different intensities on the metabolic, hormonal, and BDNF responses in trained men.","authors":"Ramires Alsamir Tibana,&nbsp;Ivo Vieira de Sousa Neto,&nbsp;Nuno Manuel Frade de Sousa,&nbsp;Wellington Martins Dos Santos,&nbsp;Jonato Prestes,&nbsp;João Henrique Falk Neto,&nbsp;Fábio H Dominski,&nbsp;Michael D Kennedy,&nbsp;Fabricio Azevedo Voltarelli","doi":"10.1186/s13102-022-00412-6","DOIUrl":"https://doi.org/10.1186/s13102-022-00412-6","url":null,"abstract":"<p><strong>Background: </strong>To investigate the time-course effects of a self-regulated training session (performed at an rating perceived exertion of 6/10), all-out session, and a control session on the metabolic, hormonal, and brain derived neurotrophic factor (BDNF) responses in Functional-Fitness (FFT) participants.</p><p><strong>Methods: </strong>In a randomized, crossover fashion, eight healthy males (age 28.1 ± 5.4 years old; body mass 77.2 ± 4.4 kg; VO_2max: 52.6 ± 4.6 mL.(kg.min)^-1; 2000 m rowing test 7.35 ± 0.18 min; 1RM back squat 135.6 ± 21.9 kg) performed a FFT session under two different conditions: all-out, or with the intensity controlled to elicit an rating perceived exertion (RPE) of 6 in the Borg 10-point scale (RPE6). A control session (no exercise) was also completed. Metabolic (lactate and creatine kinase), hormonal (testosterone and cortisol), and BDNF responses were assessed pre, post-0 h, 1 h, 2 h and 24 h after the sessions.</p><p><strong>Results: </strong>Creatine kinase concentrations were significantly higher (p ≤ 0.05) after 24 h for both training sessions. Total and free testosterone concentrations were lower post-2 h for all-out when compared to the RPE6 session (p ≤ 0.05). Serum cortisol concentration increased post-0 h (p = 0.011) for RPE6 and post-0 h (p = 0.003) and post-1 h (p = 0.030) for all-out session when comparing to baseline concentrations. BDNF was significantly higher (p = 0.002) post-0 h only for the all-out session when compared to baseline. A positive correlation between blood lactate concentrations and BDNF (r = 0.51; p = 0.01) was found for both effort interventions.</p><p><strong>Conclusions: </strong>A single FFT session when performed in all-out format acutely increases the concentrations of serum BDNF. However, physiological stress markers show that the all-out session requires a longer recovery period when compared to the RPE6 protocol. These findings can be helpful to coaches and practitioners design FFT session.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"22"},"PeriodicalIF":1.9,"publicationDate":"2022-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8822744/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39762953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does predicted age at peak height velocity explain physical performance in U13-15 basketball female players?","authors":"Karol Gryko,&nbsp;Jakub Grzegorz Adamczyk,&nbsp;Anna Kopiczko,&nbsp;Jorge Lorenzo Calvo,&nbsp;Alberto Lorenzo Calvo,&nbsp;Kazimierz Mikołajec","doi":"10.1186/s13102-022-00414-4","DOIUrl":"https://doi.org/10.1186/s13102-022-00414-4","url":null,"abstract":"<p><strong>Background: </strong>The aims of the study were (1) to identify the physical fitness and basic anthropometric characteristics of Polish female basketball players aged 13-15 years, (2) to show the effect of maturity timing on the performance in motor tests and basic body composition parameters, (3) to identify the index that contributes most to the prediction of performance in the tests of speed, jumping ability, agility, and endurance.</p><p><strong>Methods: </strong>The sample included 904 female Polish players (U13-15). In part 1, maturity timing category distribution were examined within across age-groups. Maturity timing was followed by grouping with respect to years before or after the observed peak high velocity (PHV): PHV0 (- 0.50 to 0.49), PHV1 (0.50 to 1.49), PHV2 (1.50 to 2.49) and PHV3 (2.50 to 3.49). In part 2, the relationship between the anthropometric variables, physical fitness performance was assessed based on maturity timing categories (ANCOVA analysis). In part 3, backward stepwise multiple regression analyse quantified the relationship between maturity timing (group of PHV) and physical performance.</p><p><strong>Results: </strong>ANCOVA results (age, body height, and body mass as covariates) showed in the U13 female basketball players significantly higher sprinting (20 m), jumping ability and endurance tests results of the PHV1 group. Better results was observed in U14 female players in PHV1 compared to PHV2 and PHV3 in 20 m and jumping tests but opposite trend was observed for 5 m sprint and endurance test (distance covered and VO2_max). U15 basketball players from the PHV3 group were characterized by better results of jumping abilities, endurance, 10 m and 20 m sprint and agility (total, S₄) tests. Maturity timing (10 m), chronological age (5 m, 20 m, agility, SVJ, VJ, and VO_2max tests), body height (10 m), body mass (10 m, 20 m, VJ, VO_2max), and the interaction between body mass and height (SVJ) were significant (adjusted R² = 0.02-0.10; p < 0.001) predictors of motor skills.</p><p><strong>Conclusion: </strong>Trainng content of female basketball players aged 13-15 years old should be adjusted to biological requirements especially in jumping, endurance and 20 m sprint test. The time from peak height velocity (PHV) was a significant predictor only in the 10 m sprint test.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"21"},"PeriodicalIF":1.9,"publicationDate":"2022-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8822673/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39759542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}