Julia I K Silvennoinen, Johanna K Ihalainen, Maarit Valtonen, Katja Mjøsund, Pyry N Sipilä
{"title":"Association of LEAF-Q and EDE-QS scores with cholesterol levels in Finnish female athletes.","authors":"Julia I K Silvennoinen, Johanna K Ihalainen, Maarit Valtonen, Katja Mjøsund, Pyry N Sipilä","doi":"10.1136/bmjsem-2024-002050","DOIUrl":"https://doi.org/10.1136/bmjsem-2024-002050","url":null,"abstract":"<p><strong>Objective: </strong>Low energy availability (LEA) is common in athletes. Disturbances in sex hormone levels due to insufficient energy availability have been suggested to influence cholesterol metabolism and impact the overall risk for cardiovascular disease. We assessed the relationship between Low Energy Availability in Females Questionnaire (LEAF-Q) and Eating Disorder Examination Questionnaire Short (EDE-QS) scores with cholesterol levels in a cross-sectional study of female athletes.</p><p><strong>Method: </strong>Finnish national- to international-level female athletes self-reported physiological symptoms of LEA, including menstrual disturbances, using the LEAF-Q (n=176) and eating disorder symptoms using the EDE-QS (n=294). Serum cholesterol concentrations (mmol/L) were determined from venous blood samples. We analysed the relationship between the different variables using Pearson's r and linear regression. We also studied separately participants representing lean sports, that is, sports that emphasise leanness (LEAF-Q, n=60; EDE-QS, n=80).</p><p><strong>Results: </strong>LEA symptoms were common; 72 (41%) of 176 participants scored ≥8 points in the LEAF-Q, which is indicative of a high risk of problematic LEA. A one-point increase in LEAF-Q score was associated with a small, non-significant increase in low-density lipoprotein (LDL) cholesterol level (beta=0.024, 95% CI -0.0011 to 0.049, p=0.061). Higher EDE-QS scores were associated with higher LDL cholesterol levels (beta=0.028, 95% CI 0.0098 to 0.046, p=0.0029). These associations were somewhat stronger among athletes representing lean sports (LEAF-Q and LDL: beta=0.043, 95% CI 0.0041 to 0.08, p=0.031; EDE-QS and LDL: beta=0.036, 95% CI 0.0041 to 0.068, p=0.028).</p><p><strong>Conclusion: </strong>In this study, LEAF-Q and EDE-QS were associated with higher LDL cholesterol levels among athletes representing lean sports.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e002050"},"PeriodicalIF":3.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11404290/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142298551","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}
William Suits, Meg Darmofal, Olivia Roe, Tzu-Chieh Liao
{"title":"Comparison of two implementation strategies for anterior cruciate ligament injury prevention in amateur girls’ youth soccer: a prospective cohort study","authors":"William Suits, Meg Darmofal, Olivia Roe, Tzu-Chieh Liao","doi":"10.1136/bmjsem-2024-002031","DOIUrl":"https://doi.org/10.1136/bmjsem-2024-002031","url":null,"abstract":"Objectives To compare two implementation strategies, an educational handout and a knowledge-to-action (KTA) intervention, for promoting anterior cruciate ligament (ACL) injury prevention programme (ACL-IPP) implementation in amateur youth girls’ soccer. The primary outcomes assessed include frequency of ACL-IPP implementation and ACL injury risk. Methods This was a prospective cohort study, which followed 671 amateur female soccer players (15.72±1.78 years) whose coaches received either a KTA intervention (n=400) or an educational handout (n=271) regarding implementing an ACL-IPP. Over a single season, we tracked the number of ACL injuries weekly and implementation rates at the end of the season through surveying participating coaches. A χ2 test was used to compare the ACL-IPP implementation rate between the handout and KTA intervention. Cox-hazard proportional regressions were used to examine the effect of implementation rate and educational interventions on ACL injuries. Results The KTA intervention yielded higher ACL-IPP implementation as compared with the educational handout (X2 (1, n=671)=25.87, p<0.001). Implementation of any ACL-IPP at least two times per week was associated with a lower risk of ACL injuries (HR=0.15, 95% CI=0.03, 0.73; p=0.019) compared with implementing once per week or fewer. The KTA intervention was not associated with a significantly lower risk of ACL injuries (HR=0.39, 95% CI=0.09, 1.61; p=0.191) compared with the educational handout. Conclusion Stakeholder engagement in the process of planning and execution of IPPs, such as with a KTA intervention, appears beneficial for the purposes of increasing implementation rates. Since implementation was significantly associated with lower rates of ACL injuries, this process may lead to improved results in injury prevention in amateur youth soccer. Data are available on reasonable request.","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"69 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142198679","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}
Maria Scoppolini Massini, Erika Pinelli, Alice Masini, Raffaele Zinno, Laura Dallolio, Laura Bragonzoni
{"title":"Workplace active breaks for university workers: the UNIFIT pilot study protocol","authors":"Maria Scoppolini Massini, Erika Pinelli, Alice Masini, Raffaele Zinno, Laura Dallolio, Laura Bragonzoni","doi":"10.1136/bmjsem-2024-002184","DOIUrl":"https://doi.org/10.1136/bmjsem-2024-002184","url":null,"abstract":"Sedentary behaviour (SB) is associated with an increased risk of metabolic issues (negative effects on diabetes, fasting glucose, fasting insulin, triglycerides, high-density lipoprotein cholesterol and waist circumference), cardiovascular diseases, increased risk of all-cause mortality and accelerated ageing of skeletal muscle power. The research on SB is relatively new, with much evidence regarding its negative health effects gathered within the last decade. Office workers exhibit pronounced sedentary habits, with studies indicating they can spend up to 82% of their working day sitting. To address this issue, workplaces are responsible for promoting physical activity and minimising SB among employees. In this context, one potential strategy for reducing SB and its associated risks could be implementing active breaks (ABs). ABs are defined as brief, structured periods of physical activity or exercise. This quasi-experimental pilot study aims to implement workplace ABs programme aimed at interrupting SB among the University of Bologna (Italy) workers, and it will include both intervention and control groups. The intervention group will participate in an 8-week ABs programme. The findings from this study could establish a robust basis for future large-scale research on the effectiveness of ABs interventions in workplace settings. No data are available. Not applicable.","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"220 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142198680","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}
Megan Quickfall, Matthew Cocks, Heather M Long, Francesca Di Rosa, Robert Andrews, Parth Narendran, Katie Hesketh, Alex J Wadley
{"title":"EXTOD-Immune: a randomised controlled trial to investigate whether a remotely monitored, home-based exercise intervention can reduce disease activity in people with type 1 diabetes.","authors":"Megan Quickfall, Matthew Cocks, Heather M Long, Francesca Di Rosa, Robert Andrews, Parth Narendran, Katie Hesketh, Alex J Wadley","doi":"10.1136/bmjsem-2024-002144","DOIUrl":"10.1136/bmjsem-2024-002144","url":null,"abstract":"<p><p>Type 1 diabetes (T1D) is a chronic autoimmune disease in which the adaptive immune system targets insulin-producing β-cells of pancreatic islets, leading to dependence on exogenous insulin therapy. Cytotoxic (CD8<sup>+</sup>) T-cells specific for islet antigens are major players in T1D autoimmunity. Data indicate that regular exercise may preserve β-cell function in people recently diagnosed with T1D, but the role of islet-reactive CD8<sup>+</sup> T-cells is unclear. In a randomised crossover design, this study will determine the impact of a 12-week exercise programme on the frequency and proliferative state of islet-reactive CD8<sup>+</sup> T-cells in the peripheral blood of 20 adults diagnosed with T1D within the past 3 years. The exercise intervention will consist of three high-intensity interval training sessions per week (6-10 1 min intervals >80% maximum heart rate, with 1 min rest), the duration of which will incrementally increase from 14 to 22 min. Habitual physical activity and diet will be maintained during control and washout periods. At weeks 0, 12, 24 and 36, a fasting blood sample will be collected to quantify the frequency, phenotype and proliferative activity of islet-reactive CD8<sup>+</sup> T-cells (primary outcome) and various clinical parameters. Glycaemic control will also be evaluated using 14-day continuous glucose monitoring at the start and end of each study arm. Findings may provide a rationale for conducting large-scale trials to evaluate the implementation of exercise into routine clinical care, particularly for people recently diagnosed with T1D when maintenance of β-cell function is critical to counteract disease progression. Trial registration number: ISRCTN79006041.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e002144"},"PeriodicalIF":3.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367371/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120902","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}
Tilmann Kramer, Ville Ventovuori, Ari Heinonen, Jari Parkkari, Marko T Korhonen, Anja Rovio, Jan-Niklas Hoenemann, Stefan Möstl, Wolfram Sies, Claudia Kaiser-Stolz, Philip Chilibeck, Hirofumi Tanaka, Mira Kramer, Joern Rittweger, Arto J Hautala
{"title":"Prevalence of electrocardiographic markers associated with myocardial fibrosis in masters athletes: a cohort study.","authors":"Tilmann Kramer, Ville Ventovuori, Ari Heinonen, Jari Parkkari, Marko T Korhonen, Anja Rovio, Jan-Niklas Hoenemann, Stefan Möstl, Wolfram Sies, Claudia Kaiser-Stolz, Philip Chilibeck, Hirofumi Tanaka, Mira Kramer, Joern Rittweger, Arto J Hautala","doi":"10.1136/bmjsem-2024-001988","DOIUrl":"10.1136/bmjsem-2024-001988","url":null,"abstract":"<p><strong>Objectives: </strong>Myocardial fibrosis (MF) is associated with an increased predisposition to adverse cardiac events. The accumulation of high-volume and high-intensity exercise over an extended duration potentially increases the risk of MF. Specific electrocardiographic markers have been correlated with the presence of MF. This study assessed the prevalence of MF-related electrocardiographic markers in a Track and Field Master Athletics Cohort (TaFMAC).</p><p><strong>Methods: </strong>Twelve-lead resting electrocardiograms (ECGs) were conducted on 155 athletes (90 males and 65 females) participating in the World Masters Athletics 2022. The ECG markers associated with MF, including pathological Q waves, inverted T waves, fragmented QRS complex, and prolonged QRS complex, were compared among different athletic specialities (endurance athletes n=51, sprinters n=69 and strength and power n=35).</p><p><strong>Results: </strong>Overall, 71 instances of MF-related markers were identified from 155 ECG recordings (46%). Fragmented QRS emerged as the most common marker, with a prevalence of 29% in endurance and strength and power athletes, and 35% in sprinters. No significant group differences were observed in the prevalence of MF markers, whether analysed collectively (p=0.467) or individually (pathological Q waves p=0.367, inverted T waves p=0.309, fragmented QRS complex p=0.747 and prolonged QRS complex p=0.132).</p><p><strong>Conclusions: </strong>The prevalence of MF markers, as determined by resting ECG, was evident in nearly half of masters athletes, irrespective of sex and sporting specialisation. These findings suggest resting ECG as a promising non-invasive method for the early identification of MF in athlete's hearts.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e001988"},"PeriodicalIF":3.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367365/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120905","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}
Ke-Wen Wan, Zi-Han Dai, Robin Sze-Tak Ho, Huang Wendy Yajun, Stephen Heung-Sang Wong
{"title":"Comparative effects of time-restricted feeding versus normal diet on physical performance and body composition in healthy adults with regular exercise habits: a systematic review and meta-analysis.","authors":"Ke-Wen Wan, Zi-Han Dai, Robin Sze-Tak Ho, Huang Wendy Yajun, Stephen Heung-Sang Wong","doi":"10.1136/bmjsem-2023-001831","DOIUrl":"10.1136/bmjsem-2023-001831","url":null,"abstract":"<p><strong>Background: </strong>Time-restricted feeding (TRF), a form of intermittent fasting, limits daily caloric intake to a 6-12 hour window and has been shown to effectively promote weight loss and improve overall health. This systematic review and meta-analysis aimed to compare the effects of TRF versus normal diet (ND) on physical performance and body composition in healthy adults with regular exercise habits.</p><p><strong>Methods: </strong>MEDLINE, PubMed, Embase, SPORTDiscus, Web of Science, CINAHL and the Cochrane Central Register of Controlled Trials (CENTRAL) electronic databases were searched for relevant records. Subgroup analyses were conducted based on the duration of intervention and type of exercise. Physical performance was analysed using standardised mean differences (SMDs) and 95% CIs, whereas body composition parameters were analysed using mean differences (MDs) and 95% CIs. The quality of the included studies was examined using the Cochrane risk-of-bias tool version 2.</p><p><strong>Results: </strong>15 randomised controlled trials with 361 participants were included in the systematic review. In comparison with the ND group, TRF significantly decreased body weight (MD=-1.76 kg, 95% CI -3.40 to -0.13, p=0.03, I<sup>2</sup>=11.0%) and fat mass (MD=-1.24 kg, 95% CI -1.87 to -0.61, p<0.001, I<sup>2</sup>=0.0%). No between-group differences in physical performance-related variables and fat-free mass were found. According to the result of the risk-of-bias assessment, one study showed a low risk of bias, 13 showed some concerns, and one showed a high risk of bias.</p><p><strong>Conclusion: </strong>TRF may be a valuable nutritional strategy to optimise body composition and maintain physical performance in healthy adults engaged in regular exercise.</p><p><strong>Prospero registration number: </strong>CRD42022310140.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e001831"},"PeriodicalIF":3.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367337/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120888","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}
Dale B Read, Tess R Flood, Amy E Harwood, Thomas Dos'Santos, Jonathon J S Weakley, Gethin H Evans
{"title":"Physiological and perceptual responses of wearing a dryrobe for rewarming after passive cold-water immersion in men.","authors":"Dale B Read, Tess R Flood, Amy E Harwood, Thomas Dos'Santos, Jonathon J S Weakley, Gethin H Evans","doi":"10.1136/bmjsem-2024-001934","DOIUrl":"10.1136/bmjsem-2024-001934","url":null,"abstract":"<p><strong>Objectives: </strong>To investigate the physiological and perceptual responses to wearing a dryrobe for rewarming after passive cold-water immersion (CWI).</p><p><strong>Methods: </strong>15 unhabituated healthy Caucasian men (age: 28.9 (5.4) years) attended the laboratory on three occasions and performed passive CWI (14°C) for 30 min followed by 15 min of rewarming wearing either a dryrobe, towel or foil blanket while positioned in front of fans replicating a 10 mph wind. Physiological (deep body temperature, skin temperature and heart rate) and perceptual (thermal sensation and thermal comfort) variables were measured.</p><p><strong>Results: </strong>At 15 min post-immersion, deep body temperature was higher in the dryrobe condition (mean: 37.09 (SD: 0.49)°C) compared with the foil blanket (36.98 (0.64)°C) and towel (36.99 (0.49)°C) (p<0.001). On average across the 15 min post-immersion period, the dryrobe increased skin temperature to the greatest degree (18.9 (1.0)°C, +2.4°C), compared with the foil blanket (18.1 (1.2)°C, +1.8°C, p=0.034) and the towel (16.6 (1.2)°C, +1.3°C, p<0.001). Average heart rate across the 15 min post-immersion period was lower when wearing the dryrobe (dryrobe: 74 (10) b.min<sup>-1</sup>, foil blanket: 78 (6) b.min<sup>-1</sup> and towel: 82 (14) b.min<sup>-1</sup> (p=0.015). Thermal sensation and thermal comfort were higher at all post-immersion time points in the dryrobe compared with the foil blanket and towel.</p><p><strong>Conclusions: </strong>During the rewarming period following CWI, physiological and perceptual responses are improved when wearing clothing that combines an insulative layer with a vapour barrier, such as the dryrobe compared with a towel or foil blanket. This might have future implications for safety recommendations during rewarming.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e001934"},"PeriodicalIF":3.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367343/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120904","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}
Robin Halioua, Paulina Wasserfurth, Désirée Toepffer, Malte Christian Claussen, Karsten Koehler
{"title":"Exploring the relationship between low energy availability, depression and eating disorders in female athletes: a cross-sectional study.","authors":"Robin Halioua, Paulina Wasserfurth, Désirée Toepffer, Malte Christian Claussen, Karsten Koehler","doi":"10.1136/bmjsem-2024-002035","DOIUrl":"10.1136/bmjsem-2024-002035","url":null,"abstract":"<p><strong>Objective: </strong>This cross-sectional study aimed to investigate the role of low energy availability (LEA) in the interplay between depression and disordered eating/eating disorders (DE/EDs) among female athletes. The International Olympic Committee consensus statement on Relative Energy Deficiency in Sport (REDs) identified depression as both an outcome of LEA and a secondary risk factor for REDs. However, the direct link between LEA and depression has yet to be fully established.</p><p><strong>Methods: </strong>We assessed 57 female athletes participating in weight-sensitive sports at different levels of competition training at least four times a week. Assessment was conducted using laboratory analyses, clinical interviews and the Patient Health Questionnaire-9 questionnaire. Participants were recruited through various channels, including German sports clubs, Olympic training centres, social media platforms and the distribution of flyers at competitions. Indicators of LEA were defined if at least two of the following three physiological indicators were present: menstrual disturbances, suppressed resting metabolic rate and suppressed thyroid hormones. Logistic and linear regression analysis were used to examine the relationship between LEA, depression and DE/ED.</p><p><strong>Results: </strong>The lifetime prevalence of depressive disorders was 29.6%. 19% of the participants were diagnosed with an ED, and an additional 22.6% exhibited DE.LEA was not significantly associated with either lifetime prevalence of depressive disorders or current depressive symptoms. However, a significant association was found between depression and DE/ED in terms of both lifetime prevalence and current depressive symptoms. DE/ED increased the probability of lifetime prevalence of depressive disorders by 34% (19%-49%) compared with normal eating behaviour.</p><p><strong>Conclusion: </strong>We found no evidence that LEA is an independent factor for depression in female athletes. Its association with LEA and REDs appears to occur primarily in the presence of DE/ED.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e002035"},"PeriodicalIF":3.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367324/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120901","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}
Kerry Peek, Julia Georgieva, A Serner, Filip Orest
{"title":"Differences in the technical performance of heading between men and women football players during FIFA World Cup 2022 and FIFA Women's World Cup 2023 matches.","authors":"Kerry Peek, Julia Georgieva, A Serner, Filip Orest","doi":"10.1136/bmjsem-2024-002066","DOIUrl":"10.1136/bmjsem-2024-002066","url":null,"abstract":"<p><strong>Objectives: </strong>To compare the incidence of headers, attempted headers, and other head impacts, and the difference in heading descriptors, including technical performance, between men and women in a purposive sample of FIFA World Cup 2022 (FWC22) and FIFA Women's World Cup (FWWC23) matches.</p><p><strong>Methods: </strong>Video analysis of all observed headers, attempted headers and other head impacts during eight FWC matches (FWC22 (n=4); FWWC23 (n=4)) where the same national teams competed. Heading descriptors (including ball delivery method, purpose of the header and involvement of other players) and technical performance of each header (including controlled or uncontrolled header, use of upper body, point of head contact) were analysed using negative binomial regression analyses with men as the reference group (reported as incidence rate ratios (IRR)). Timing of eye closure was analysed using a t-test; α-error, p=<0.05.</p><p><strong>Results: </strong>From 973 head impacts, 845 (87%) were headers (FWC22 mean 5.0 headers/player/match, FWWC23 mean 4.6 headers/player/match), 93 (10%) were attempted headers and 35 (4%) were unintentional head impacts. When compared with men, women were less likely to perform controlled headers (73% vs 83%, IRR 1.20, p=0.01), use their foreheads (IRR 2.36, p=<0.001) and their upper body during the header (80% vs 88%, IRR 1.29, p=0.005). Women also closed their eyes earlier before the header (1.91 vs 1.56 frames, d=0.41, p=0.002).</p><p><strong>Conclusion: </strong>There were significant differences in heading technique between women and men, which could be important to address in training to improve heading performance and potentially reduce short-term and long-term burden of heading.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e002066"},"PeriodicalIF":3.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367317/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120889","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}
Ida Åkerlund, Sofi Sonesson, Hanna Lindblom, Eric Hagelin, Siw Carlfjord, Martin Hägglund
{"title":"\"I'd rather do that (Knee Control) than be injured and not able to play\": a qualitative study on youth floorball players' and coaches' perspectives of how to overcome barriers for injury prevention exercise programme use.","authors":"Ida Åkerlund, Sofi Sonesson, Hanna Lindblom, Eric Hagelin, Siw Carlfjord, Martin Hägglund","doi":"10.1136/bmjsem-2024-001953","DOIUrl":"10.1136/bmjsem-2024-001953","url":null,"abstract":"<p><p>This study explored youth floorball players' and coaches' perspectives on using the injury prevention exercise programmes (IPEPs) <i>Knee Control</i> or <i>Knee Control+</i> (<i>Knee Control</i> programmes) and how to overcome barriers to programme use. We used a qualitative design with eight semistructured focus group discussions, six with players, 11-17 years old (n =42) and two with coaches (n =12). Data analysis followed the principles of qualitative content analysis. Three main categories emerged: challenges related to preventive training, promoting factors and solutions to facilitate the use of preventive training. To overcome barriers, players and coaches gave examples of how to tailor preventive programmes, such as adding joyful sport specific components. Player-perceived improved performance, with increased strength and speed from the preventive training, could be a promoting factor to increase motivation and enable IPEP use. Players and coaches offered examples of how to adapt and progress the preventive training by progressing gradually and choosing exercises that fit the team. Coaches emphasised that preventive training is important but difficult to prioritise in time-limited training sessions. Coaches' suggestions to overcome barriers were through collaboration and support from other coaches, to start using the IPEP at an early age, to keep it simple and motivating the players with, for example, positive role models. Players found the <i>Knee Control</i> exercises boring but necessary for injury prevention. Sometimes, coaches felt uncertain of their competence to use the <i>Knee Control</i> programmes and wished for support from the federation, club and other coaches. Players and coaches shared ideas on how to overcome barriers to IPEP use, such as to increase players' motivation, having a good structure, setting up routines for preventive training and to tailor the preventive training to the team. These findings can be used to further develop practical workshops and recommendations for programme use for players and coaches in youth team ball sports.</p>","PeriodicalId":47417,"journal":{"name":"BMJ Open Sport & Exercise Medicine","volume":"10 3","pages":"e001953"},"PeriodicalIF":3.9,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11367341/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142120887","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}