BMC sports science, medicine & rehabilitation最新文献

{"title":"Effects of small-sided games and running-based high-intensity interval training on body composition and physical fitness in under-19 female soccer players.","authors":"Sinan Nayıroğlu,&nbsp;Ali Kerim Yılmaz,&nbsp;Ana Filipa Silva,&nbsp;Rui Silva,&nbsp;Hadi Nobari,&nbsp;Filipe Manuel Clemente","doi":"10.1186/s13102-022-00516-z","DOIUrl":"https://doi.org/10.1186/s13102-022-00516-z","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to compare the effects of small-sided games (SSGs) and running-based high-intensity interval training (HIIT) on the body composition and physical fitness of youth female soccer players.</p><p><strong>Methods: </strong>This study followed a randomized parallel study design. Twenty-four female soccer players (age: 18.63 ± 2.36 years) were randomly allocated to two training groups (SSG, n = 12; and HIIT, n = 12). The training intervention had a duration of eight weeks, consisting of three training sessions per week. Players were assessed twice (pre- and post-intervention) for anthropometrics, vertical (countermovement jumps, CMJ; and drop jumps, DJ) and horizontal jumping (single, triple and crossover hop), sprinting (10- and 30-m), change-of-direction (COD), COD deficit and final velocity at 30-15 Intermittent Fitness Test (V_IFT). A covariance analysis (ANCOVA) was used to determine differences between the groups in the effect on post-intervention by controlling for covariates (pre-intervention). The within-group analysis (time) was performed using a paired t-test, while the between-group analysis per assessment moment was performed using an independent t-test.</p><p><strong>Results: </strong>The between-group analysis with ANCOVA revealed that there are no significant differences between the SSG and HIIT groups in the post-intervention for any outcome (p > 0.05). The within-group analysis revealed significant improvements in both the SSG and HIIT groups in CMJ (p < 0.05), single, triple and crossover hops (p < 0.05), RSI DJ 30-cm and RSI DJ 40-cm (p < 0.05), VIFT (p < 0.05) and COD (p < 0.05).</p><p><strong>Conclusions: </strong>SSG and HIIT are both effective for improving vertical and horizontal jumping ability, change-of-direction, and aerobic capacity status measured at a progressive and intermittent multistage test in youth soccer players.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"119"},"PeriodicalIF":1.9,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9238068/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40404427","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":"Characteristics of internal oblique muscle strain in professional baseball players: a case series.","authors":"Shuro Komatsu,&nbsp;Hironori Kaneko,&nbsp;Masaki Nagashima","doi":"10.1186/s13102-022-00510-5","DOIUrl":"https://doi.org/10.1186/s13102-022-00510-5","url":null,"abstract":"<p><strong>Background: </strong>Internal oblique muscle strains can develop in professional baseball players, rendering the players unable to continue playing for a certain period. However, the characteristics of this injury are not well known. The purpose of the present study was to investigate the details of the injury and the post injury course of internal oblique muscle strain in professional baseball players.</p><p><strong>Methods: </strong>The subjects were members of a single Japanese professional baseball team with a total of 188 players (81 fielders and 107 pitchers) who developed internal oblique muscle strains from January 2012 to December 2021. The diagnosis of muscle strain was made on the basis of local pain and magnetic resonance imaging findings. The incidence of internal oblique muscle strain, the details of the site of the injury, and the time to return to play were examined.</p><p><strong>Results: </strong>There were 28 cases in 23 players (12.2%) of internal oblique muscle strain. The players were 16 fielders (24.7%) and 7 pitchers (7.5%), with a significantly greater incidence in fielders (p = 0.001). Although internal oblique muscle strain was more common on the side contralateral to the batting or pitching side, it occurred on either side. Most of the injury sites were at the region of the muscle insertion to the lower ribs. At a mean time of 36.5 months after the initial injury, 5 players (21.7%) developed another internal oblique muscle strain. The mean time to return to play was 27.7 ± 9.7 days (range, 4-53 days).</p><p><strong>Conclusions: </strong>Baseball players who have symptoms at the side of the trunk should be regarded as having possible internal oblique muscle strain, and proactive examination should be considered.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"118"},"PeriodicalIF":1.9,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9233777/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40397224","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":"Multicomponent exercises to prevent and reduce back pain in elderly care nurses: a randomized controlled trial.","authors":"Ann-Kathrin Otto,&nbsp;Bettina Wollesen","doi":"10.1186/s13102-022-00508-z","DOIUrl":"https://doi.org/10.1186/s13102-022-00508-z","url":null,"abstract":"<p><strong>Background: </strong>Sports science is making an important contribution to health services research and supports the development of tailored interventions, e.g., in nursing settings. Working in elderly care is associated with a high prevalence of low back pain (LBP). Due to the diverse requirements and high strains, multicomponent programs are essential to address all relevant factors. This randomized controlled trial investigated the effects of a tailored ten-week ergonomics and twelve-week strength training on lifting behavior, strength endurance, LBP, functional impairment and adherence.</p><p><strong>Methods: </strong>n = 42 nurses were randomly assigned to the intervention (IG; n = 20) or control group (CG; n = 22). They were eligible for participation if they were active in residential care and if they provided written informed consent. Other employees were excluded. The data were collected at baseline, at ten weeks (after ergonomics training), at 22 weeks (after strength training), and at 34 weeks (follow-up). The analysis combined physical tests with questionnaires (Progressive Isoinertial Lifting Evaluation, PILE-Test; Biering-Sørensen-Test; Visual Analog Scale Pain, VAS; Oswestry Disability Index, ODI; self-developed questionnaire for adherence). Group differences were analyzed by Chi²-Tests, ANOVA, and Linear Mixed Models.</p><p><strong>Results: </strong>The IG showed an improved lifting performance (PILE-Test; 95% CI 1.378-7.810, p = .006) and a reduced LBP compared to the CG (VAS; 95% CI - 1.987 to 0.034, p = .043) after ergonomics training (PILE-Test, F_(1,34) = 21.070, p < .001; VAS, F_(1,34) = 5.021, p = .032). The results showed no differences concerning the Biering-Sørensen-Test and the ODI. Positive adherence rates were observed.</p><p><strong>Conclusions: </strong>This approach and the positive results are essential to derive specific recommendations for effective prevention. The study results can be completed in future research with additional strategies to reduce nurses' burden further.</p><p><strong>Trial registration: </strong>The trial was registered at DRKS.de (DRKS00015249, registration date: 05/09/2018).</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"114"},"PeriodicalIF":1.9,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9210633/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40162947","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":"Physical fitness and throwing speed in U13 versus U15 male handball players.","authors":"Jaime Fernandez-Fernandez,&nbsp;Urs Granacher,&nbsp;Isidoro Martinez-Martin,&nbsp;Vicente Garcia-Tormo,&nbsp;Alba Herrero-Molleda,&nbsp;David Barbado,&nbsp;Juan Garcia-Lopez","doi":"10.1186/s13102-022-00507-0","DOIUrl":"https://doi.org/10.1186/s13102-022-00507-0","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to analyze the shoulder functional profile (rotation range of motion [ROM] and strength), upper and lower body performance, and throwing speed of U13 versus U15 male handball players, and to establish the relationship between these measures of physical fitness and throwing speed.</p><p><strong>Methods: </strong>One-hundred and nineteen young male handball players (under (U)-13 (U13) [n = 85]) and U15 [n = 34]) volunteered to participate in this study. The participating athletes had a mean background of sytematic handball training of 5.5 ± 2.8 years and they exercised on average 540 ± 10.1 min per week including sport-specific team handball training and strength and conditioning programs. Players were tested for passive shoulder range-of-motion (ROM) for both internal (IR) and external rotation (ER) and isometric strength (i.e., IR and ER) of the dominant/non-dominant shoulders, overhead medicine ball throw (OMB), hip isometric abductor (ABD) and adductor (ADD) strength, hip ROM, jumps (countermovement jump [CMJ] and triple leg-hop [3H] for distance), linear sprint test, modified 505 change-of-direction (COD) test and handball throwing speed (7 m [HT7] and 9 m [HT9]).</p><p><strong>Results: </strong>U15 players outperformed U13 in upper (i.e., HT7 and HT9 speed, OMB, absolute IR and ER strength of the dominant and non-dominant sides; Cohen's d: 0.76-2.13) and lower body (i.e., CMJ, 3H, 20-m sprint and COD, hip ABD and ADD; d: 0.70-2.33) performance measures. Regarding shoulder ROM outcomes, a lower IR ROM was found of the dominant side in the U15 group compared to the U13 and a higher ER ROM on both sides in U15 (d: 0.76-1.04). It seems that primarily anthropometric characteristics (i.e., body height, body mass) and upper body strength/power (OMB distance) are the most important factors that explain the throw speed variance in male handball players, particularly in U13.</p><p><strong>Conclusions: </strong>Findings from this study imply that regular performance monitoring is important for performance development and for minimizing injury risk of the shoulder in both age categories of young male handball players. Besides measures of physical fitness, anthropometric data should be recorded because handball throwing performance is related to these measures.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"113"},"PeriodicalIF":1.9,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9210574/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40103826","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":"What are the odds? Identifying factors related to competitive success in powerlifting.","authors":"Daniel J van den Hoek,&nbsp;Patrick J Owen,&nbsp;Joel M Garrett,&nbsp;Robert J Howells,&nbsp;Joshua Pearson,&nbsp;Jemima G Spathis,&nbsp;Christopher Latella","doi":"10.1186/s13102-022-00505-2","DOIUrl":"https://doi.org/10.1186/s13102-022-00505-2","url":null,"abstract":"<p><strong>Background: </strong>The ability for athletes to gain a competitive advantage over their opponents is well recognised. At times, this advantage may be considered a marginal gain. However, in the context of competition, marginal advantages may be the difference between winning and losing. This investigation explores how competition factors influence the odds of competitive success (i.e. winning) in powerlifting (PL) to assist athletes and coaches in achieving a competitive advantage.</p><p><strong>Methods: </strong>A cross-sectional, retrospective analysis of competition data from raw/classic, Australian powerlifting competitions 2010-2019 was conducted. Data included 10,599 competition entries (males: n = 6567 [62%], females: n = 4032 [38%]). Independent t-tests were used to compare continuous data between sexes or winners and non-winners at an event. Cohen's d and the 95% confidence interval (d [95% CI]) were calculated. Univariate odds of winning an event based on independent variables (age [irrespective of category], sex, body weight and weight of first lift attempt [regardless of success]), were assessed by separate simple logistic regression.</p><p><strong>Results: </strong>When compared to males, the odds of winning for females were 50% greater (OR [95% CI] 1.500 [1.384, 1.625]; P < 0.001). Athletes who had larger first lift attempts (Squat: + 7.0 kg P < 0.001, Bench Press: + 3.2 kg P < 0.001, and Deadlift: + 6.1 kg P < 0.001and competed for a longer period (winners: 401 vs non-winners: 304 days, P < 0.001) had an increased likelihood winning. Age was associated with increased odds of success for males (OR [95% CI] 1.014 [1.009, 1.019], P < 0.001) per additional year of age for males, but not females (P = 0.509).</p><p><strong>Conclusions: </strong>Multiple factors appear to contribute to the likelihood of winning a PL competition. These results may help coaches to develop competition and training strategies that optimise athletes' likelihood of competitive success in PL.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"110"},"PeriodicalIF":1.9,"publicationDate":"2022-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9206735/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39999315","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":"Adherence to a guided walking program with amelioration of cognitive functions in subjects with schizophrenia even during COVID-19 pandemic.","authors":"S Mandini,&nbsp;M Morelli,&nbsp;M Belvederi Murri,&nbsp;L Grassi,&nbsp;S Masotti,&nbsp;L Simani,&nbsp;V Zerbini,&nbsp;A Raisi,&nbsp;T Piva,&nbsp;G Grazzi,&nbsp;G Mazzoni","doi":"10.1186/s13102-022-00440-2","DOIUrl":"https://doi.org/10.1186/s13102-022-00440-2","url":null,"abstract":"<p><strong>Background: </strong>Aim of the study was to enrol a group of individuals with schizophrenia in a long-term moderate-intensity physical activity program and to evaluate its effects on their cognitive functions and cardiovascular risk factors. An additional aim of the study was the comparison of the adherence to the physical activity program before and during the COVID-19 pandemic.</p><p><strong>Methods: </strong>Forty sedentary patients diagnosed with schizophrenia (mean age 46.4 ± 9.6) followed by the Public Mental Health Department of Ferrara were included in the study. 28 of them followed a 1-year walking program consisting of two guided walking sessions/week, while 12 maintained their sedentary lifestyle and followed the usual Cognitive Rehabilitation program. To the participants following the walking program VO₂ peak and walking speed were assessed at baseline and at the end of the program. All participants were evaluated on blood pressure and anthropometric variable. Cognitive functions were assessed with the Screen for Cognitive Impairment in Psychiatry (SCIP) and with the Frontal Assessment Battery (FAB) questionnaires.</p><p><strong>Results: </strong>The 20 participants completing the walking program displayed significant improvements in cognitive functions (d_ppc2 0.35 for SCIP and 0.26 for FAB), with a positive correlation between SCIP score and the number of sessions attended (R = 0.86, p < 0.001), evident in the patients attending to at least 75 of the 100 walking sessions. Walking speed and VO₂peak increased significantly and a decrease of body weight, BMI, systolic and diastolic blood pressure was also observed. The adherence to the walking program registered during Covid-19 period did not differ from that observed before the pandemic. The 12 CG (Control Group) patients maintaining the sedentary lifestyle did not display improvements of cognitive functions.</p><p><strong>Conclusions: </strong>The main finding of this study is the improvement of cognitive functions which is significantly related to the number of walking sessions attended by participants with schizophrenia. The walking program, guided by exercise specialists, proved to be an enjoyable activity for people with mental disorder feasible even during the COVID-19 pandemic. Trial registration Retrospectively registered on ISRCTN as non-randomized trial (n. ISRCTN14763786).</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"48"},"PeriodicalIF":1.9,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8951652/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40328394","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":"CrossFit® open performance is affected by the nature of past competition experiences.","authors":"Gerald T Mangine,&nbsp;Jacob M McDougle","doi":"10.1186/s13102-022-00434-0","DOIUrl":"https://doi.org/10.1186/s13102-022-00434-0","url":null,"abstract":"<p><strong>Purpose: </strong>To examine the relationships between past competition performances and 2020 CrossFit® Open (CFO) performance.</p><p><strong>Methods: </strong>A random selection from the top one thousand athletes (n = 220, 28.5 ± 4.4 years, 178 ± 7 cm, 87.5 ± 10.2 kg) were selected for this study. Overall and weekly performances (including ranks and scores) of the 2020 CFO, as well as overall ranks from all previous CFO, regional, and Games™ competitions in which they competed, were recorded from their publicly available online profile. The highest, lowest, average, and standard deviation (SD) of past rankings, as well as participation statistics (i.e., years since first appearance, total and consecutive appearances, and participation rate), were calculated for each competition stage. Relationships were then assessed between 2020 CFO performance and all past competition experience variables by calculating Kendall's tau (τ) correlation coefficients and Bayes factors (BF₁₀).</p><p><strong>Results: </strong>Overall and weekly ranking of the 2020 CFO was extremely favored (p < 0.001, BF₁₀ > 100) to be related to the athlete's highest previous CFO rank (τ = 0.26-0.39) and individual regional appearances (τ = - 0.26 to - 0.34), as well as individual Games™ appearances (overall and for weeks 1, 3, and 4; τ = - 0.20 to - 0.22, p < 0.001, BF₁₀ > 100). Evidence for all other significant relationships ranged from moderate to very strong (p < 0.05, BF₁₀ = 3-100) and varied among specific 2020 CFO workouts. Few associations were noted for team competition experience, and these were generally limited to Games™ appearances (τ = - 0.12 to - 0.18, p < 0.05, BF₁₀ = 3.3-100).</p><p><strong>Conclusions: </strong>Although specific relationships were found between 2020 CFO performance and individual appearances at regional and Games™ competitions, the most consistent relationships were seen with participation and ranking in past CFO competitions.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"46"},"PeriodicalIF":1.9,"publicationDate":"2022-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8944014/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40326628","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":"Exploring the Y-Balance-Test scores and inter-limb asymmetry in soccer players: differences between competitive level and field positions.","authors":"Francisco Tomás González-Fernández,&nbsp;Luis Manuel Martínez-Aranda,&nbsp;Moisés Falces-Prieto,&nbsp;Hadi Nobari,&nbsp;Filipe Manuel Clemente","doi":"10.1186/s13102-022-00438-w","DOIUrl":"https://doi.org/10.1186/s13102-022-00438-w","url":null,"abstract":"<p><strong>Background: </strong>The postural stability seems to be important in the physical development of the soccer player and the specific tasks related to the game. In addition, it is related to the injury risk and therefore, with the injury prevention and retraining processes. In this context, the Y Balance Test (YBT) is presented as a tool to assess dynamic postural control.</p><p><strong>Objective: </strong>This study aimed to explore the differences and possible correlations in the YBT scores and inter-limb asymmetry for anterior (ANT), posteromedial (PM) and posterolateral (PL) directions by category and field position in soccer players.</p><p><strong>Methods: </strong>173 males soccer players aged between 14 and 33 years old agreed to participate. Five categories and six field position were considered in this study. A standardised protocol was used at multiple clubs during the pre-season assessment of musculoskeletal function in soccer players. All the players performed the Y Balance Test (YBT) (official YBT Kit), assessing the dominant and non-dominant leg for three YBT directions (anterior-AN, posteromedial-PM and posterolateral-PL), inter-limb asymmetry and composite score.</p><p><strong>Results: </strong>For AN, amateur and semiprofessional obtained the highest values for Dominant and Non-Dominant legs (Range_mean = 101.8-109.4%) and the lowest level in PRO players (mean: 62.0%). Concerning PM-PL, semiprofessional (Range_mean = 126.4-132.7%, dominant and non-Dominant respectively), followed by professional and amateur reported higher scores compared to youth categories. Inter-limb asymmetry showed higher values in lower age categories. The best composite scores were detected in semiprofessionals (Range_mean = 113.3-126.7% for dominant and Range_mean = 113.8-129.7% for non-Dominant leg), compared with the rest of the categories and for each field position evaluated.</p><p><strong>Conclusion: </strong>Comparisons between field-positions revealed that centre-backs were worse than wingers and forwards. In order to explain variations in dynamic balance between competitive levels within the same age-group, special considerations about training programmes and related co-variables should be considered.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"45"},"PeriodicalIF":1.9,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8944159/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40317066","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":"Purchasing behavior and use of digital sports offers by CrossFit® and weightlifting athletes during the first SARS-CoV-2 lockdown in Germany.","authors":"Nicole Meier,&nbsp;Till Nägler,&nbsp;Robin Wald,&nbsp;Annette Schmidt","doi":"10.1186/s13102-022-00436-y","DOIUrl":"https://doi.org/10.1186/s13102-022-00436-y","url":null,"abstract":"<p><strong>Background: </strong>To combat the spread of SARS-CoV-2, CrossFit® training centers, and fitness studios were closed during the first lockdown in Germany from mid-March until June 2020, and as a result, CrossFit® (CFA) or weightlifting athletes (WLA) faced a major challenge for the first time. Therefore, this study aimed to investigate the impact of the first lockdown on the training behavior and to analyze the way the athletes dealt with the new situation. In detail, we focus on habits of purchase and examine the acceptance of digital sports offers between CFA and WLA in response to the restrictions of the nationwide lockdown.</p><p><strong>Methods: </strong>An online survey was used to characterize the purchasing behavior and use of digital sports offers of CFA and WLA. In total, 484 volunteers (192 women, 290 men, 2 diverse) responded to the online questionary, allowing us to identify changes in training behavior and differences between the sports disciplines.</p><p><strong>Results: </strong>Our data shows both CFA and WLA purchase new equipment for a home gym and the use of digital sports increased significantly across all age groups. A comparison during the lockdown even showed that within the CFA, one group (n = 142) reported losing 5 kg or more of body mass, while the value of the WLA remained constant. On the one hand, the results indicate that despite the restrictions during the lockdown, CFA were may able to enhance health aspects by improving their body composition. On the other hand, this study shows that the training habits of both groups of athletes have changed significantly with the use of digital sports offers.</p><p><strong>Conclusions: </strong>We suppose that the great openness and the expansion of online sports offers during the first lockdown may change the sports industry in the future.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"44"},"PeriodicalIF":1.9,"publicationDate":"2022-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8940977/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40317067","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":"Musculoskeletal pain and its association with health status, maturity, and sports performance in adolescent sport school students: a 2-year follow-up.","authors":"Julia S Malmborg,&nbsp;Ann Bremander,&nbsp;Stefan Bergman,&nbsp;Emma Haglund,&nbsp;M Charlotte Olsson","doi":"10.1186/s13102-022-00437-x","DOIUrl":"https://doi.org/10.1186/s13102-022-00437-x","url":null,"abstract":"<p><strong>Background: </strong>Musculoskeletal pain and its risk factors are rarely assessed in studies on adolescent athletes. The aim was to identify risk factors at baseline that were associated with the persistence or development of musculoskeletal pain at a two-year follow-up in adolescent sport school students, and to study cross-sectional associations at follow-up between musculoskeletal pain and sports performance.</p><p><strong>Methods: </strong>Sport school students (79 boys and 52 girls, aged 14 years at baseline) were divided into infrequent (never-monthly) or frequent (weekly-almost daily) pain groups, based on frequency of pain using a pain mannequin. Logistic regression analyses were performed to study longitudinal associations between frequent pain at follow-up and baseline variables: pain group, number of regions with frequent pain, health status by EQ-5D, maturity offset (pre, average, or post peak height velocity), and sports (contact or non-contact). Linear regression analyses were used to study cross-sectional associations between pain groups and 20-m sprint, agility T-test, counter-movement jump, and grip strength at follow-up. Results were stratified by sex.</p><p><strong>Results: </strong>A higher percentage of girls than boys reported frequent pain at follow-up (62% vs. 37%; p = 0.005). In boys, frequent pain at follow-up was associated with being pre peak height velocity at baseline (OR 3.884, CI 1.146-13.171; p = 0.029) and participating in non-contact sports (OR 3.429, CI 1.001-11.748; p = 0.050). In girls, frequent pain at follow-up was associated with having frequent pain in two or more body regions at baseline (OR 3.600, CI 1.033-12.542; p = 0.044), having a worse health status at baseline (OR 3.571, CI 1.026-12.434; p = 0.045), and participating in non-contact sports (OR 8.282, CI 2.011-34.116; p = 0.003). In boys, frequent pain was associated with worse performances in 20-m sprint and counter-movement jump, but not in agility T-test and grip strength.</p><p><strong>Conclusions: </strong>Baseline risk factors for having frequent pain at follow-up were late maturation in boys, frequent pain and worse health status in girls, and participation in non-contact sports in both sexes. Boys with pain performed worse in sports tests. Coaches and school health-care services should pay attention to the risk factors and work towards preventing pain from becoming persistent.</p>","PeriodicalId":520573,"journal":{"name":"BMC sports science, medicine & rehabilitation","volume":" ","pages":"43"},"PeriodicalIF":1.9,"publicationDate":"2022-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8939173/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40311911","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}