British Journal of Sports Medicine最新文献

{"title":"Impact of postpartum physical activity on maternal sleep: a systematic review and meta-analysis","authors":"Paris A T Jones, Stephanie-May Ruchat, Zain Khan-Afridi, Muhammad Usman Ali, Brittany A Matenchuk, Sierra Leonard, Andrew WE Jantz, Kier Vander Leek, Lauren Maier, Laura Osachoff, Melanie J Hayman, Milena Forte, Allison Sivak, Margie H Davenport","doi":"10.1136/bjsports-2024-108839","DOIUrl":"https://doi.org/10.1136/bjsports-2024-108839","url":null,"abstract":"Objective To examine the relationship between postpartum physical activity and maternal sleep. Design Systematic review with random-effects meta-analysis. Online databases were searched through 20 January 2025. Study eligibility criteria Studies of all designs (except case studies and reviews) in all languages were eligible if they contained information on the population (individuals up to 1 year post partum); interventions/exposures (including subjective or objective measures of frequency, intensity, duration, volume or type of exercise, alone (‘exercise only’) or in combination with other intervention components (eg, dietary; ‘exercise+co-intervention’)); comparator (low volume or no physical activity) and outcomes: sleep duration, quality, latency, efficiency, disturbance and fatigue. Results 12 unique studies (n=3096) from nine countries were included. Moderate certainty of evidence showed that exercise-only interventions were associated with a greater improvement in sleep quality (five randomised controlled trials (RCTs), n=375, standardised mean difference (SMD) −0.44, 95% CI −0.79 to –0.09) compared with no exercise. High certainty of evidence showed that exercise interventions were associated with a greater improvement in daytime/general fatigue (six RCTs, n=535, SMD −0.56, 95% CI −1.06 to –0.05) compared with no exercise. No effect was found for sleep duration, latency, efficiency, or disturbance. Conclusion Postpartum physical activity improves maternal sleep quality and daytime/general fatigue. No data are available.","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"6 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon monoxide inhalation to increase haemoglobin mass: a canary in a coal mine for sport?","authors":"Cory Dugan, Stephen Hennigar","doi":"10.1136/bjsports-2024-109240","DOIUrl":"https://doi.org/10.1136/bjsports-2024-109240","url":null,"abstract":"The desire to enhance athletic performance drives research into potential ergogenic aids. Carbon monoxide (CO) is a colourless, odourless and poisonous gas that is difficult to detect, making it known as the ‘silent killer’.1 Despite its toxicity, CO has found varied applications in medicine and sport.2–9 Although CO can serve as a tool for monitoring performance gains through the measurement of haemoglobin mass (Hbmass),8 9 research surrounding its potential use as an ergogenic aid has raised ethical concerns.1 This editorial describes the legitimate applications of CO in sports and ways it may be exploited as an ergogenic aid to enhance athletic performance. At the turn of the 20th century, pioneering research by John Haldane revealed that CO binds to haemoglobin with greater affinity than oxygen, forming carboxyhaemoglobin (COHb), limiting the oxygen-carrying capacity of the blood and leading to anaemic hypoxia.2 This finding stemmed from Haldane’s earlier research on miners that led to his idea of using canaries in coal mines. These birds, more sensitive to CO, were used as early warning signs to detect toxic gas levels, alerting miners to evacuate before CO concentrations became lethal. The toxic effects of CO are proportional to COHb concentrations, with moderate adverse effects (eg, fatigue, headache, nausea) typically presenting with COHb >10–20% and progressing in severity to heart failure, coma and death as COHb concentrations increase.2 These fundamental discoveries, coupled with advances in respiratory physiology and gas analysis techniques, laid the foundation for the applications discussed herein. One of the most significant advancements was the development of the CO rebreathing …","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"62 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of reducing tendon compression in the rehabilitation of insertional Achilles tendinopathy: a randomised clinical trial","authors":"Lauren Pringels, Robbe Capelleman, Aäron Van den Abeele, Arne Burssens, Guillaume Planckaert, Evi Wezenbeek, Luc Vanden Bossche","doi":"10.1136/bjsports-2024-109138","DOIUrl":"https://doi.org/10.1136/bjsports-2024-109138","url":null,"abstract":"Objective To assess the effectiveness of low tendon compression rehabilitation (LTCR) versus high tendon compression rehabilitation (HTCR) for treating patients with insertional Achilles tendinopathy. Methods In an investigator-blinded, stratified randomised trial, 42 sport-active patients (30 males and 12 females; age 45.8±8.2 years) with chronic (> 3 months) insertional Achilles tendinopathy were allocated in a 1:1 ratio to receive LTCR or HTCR. Both rehabilitation protocols consisted of a progressive 4-stage tendon-loading programme, including isometric, isotonic, energy-storage and release and sport-specific exercises. The LTCR programme was designed to control Achilles tendon compression by limiting ankle dorsiflexion during exercise, eliminating calf stretching and incorporating heel lifts. The primary outcome was the Victorian Institute of Sports Assessment-Achilles (VISA-A) score at 12 and 24 weeks, which measures tendon pain and function and was analysed on an intention-to-treat basis using a linear mixed model. Significance was accepted when p<0.05. Results 20 patients were randomised to the LTCR group and 22 to the HTCR group. Improvement in VISA-A score was significantly greater for LTCR compared with HTCR after 12 weeks (LTCR=24.4; HTCR=12.2; mean between-group difference=12.9 (95% CI: 6.2 to 19.6); p<0.001) and after 24 weeks (LTCR=29.0; HTCR=19.3; mean between-group difference=10.4 (95% CI: 3.7 to 17.1); p<0.001). These differences exceeded the minimal clinically important difference of 10. Conclusions In sport-active patients with insertional Achilles tendinopathy, LTCR was more effective than HTCR in improving tendon pain and function at 12 and 24 weeks. Consequently, LTCR should be considered in the treatment of insertional Achilles tendinopathy. Trial registration number ClinicalTrials.gov (ID: [NCT05456620][1]). Data are available upon reasonable request. Data are available on reasonable request. The data sets generated during and/or analysed during the current study are available from the corresponding author on reasonable request. [1]: /lookup/external-ref?link_type=CLINTRIALGOV&access_num=NCT05456620&atom=%2Fbjsports%2Fearly%2F2025%2F02%2F26%2Fbjsports-2024-109138.atom","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"15 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of sleep on postpartum health outcomes: a systematic review and meta-analysis","authors":"Zain Khan-Afridi, Stephanie-May Ruchat, Paris A T Jones, Muhammad Usman Ali, Brittany A Matenchuk, Sierra Leonard, Andrew WE Jantz, Kier Vander Leek, Lauren E Maier, Laura Osachoff, Melanie J Hayman, Milena Forte, Allison Sivak, Margie H Davenport","doi":"10.1136/bjsports-2024-109604","DOIUrl":"https://doi.org/10.1136/bjsports-2024-109604","url":null,"abstract":"Objective To examine the impact of postpartum sleep interventions and postpartum sleep on maternal health outcomes. Design Systematic review with random-effects meta-analysis. Online databases were searched on 12 January 2024. Study eligibility criteria Studies of all designs (except case studies and reviews) in all languages were eligible if they contained information on the population (individuals up to 1-year post partum), sleep interventions/exposures including (type, duration, frequency, alone or in combination with other components), comparator (control or different duration, frequency or type of sleep intervention) and outcomes: mental health, cardio-metabolic, postpartum weight retention (PPWR), low back pain and pelvic girdle pain, breastfeeding and urinary incontinence. Results 60 studies (n=20 684) from 14 countries were included. ‘High’ certainty of evidence showed that sleep interventions were associated with a greater decrease in depressive symptom severity compared with no intervention (five randomised controlled trials; n=992; standardised mean difference −0.27, 95% CI −0.40 to –0.14; small effect). Sleep interventions had no impact on the odds of developing depression (‘moderate’ certainty of evidence) or anxiety or anxiety symptom severity (‘low’ certainty of evidence). Additionally, ‘low’ certainty of evidence demonstrated no effect on cardiometabolic outcomes (systolic blood pressure, diastolic blood pressure, mean arterial pressure), anthropometric measures (maternal weight, body mass index) or prevalence of exclusive breastfeeding. ‘Low’ certainty of evidence from observational studies found that high-quality sleep reduces the odds of developing anxiety and reduces the severity of depression and anxiety symptoms. ‘Low’ and ‘very low’ certainty of evidence from observational studies found that shorter sleep duration is associated with greater PPWR. Conclusions Postpartum sleep interventions reduced the severity of depression symptoms. No data are available. n/a.","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"101 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sleep quantity and quality during the first week postinjury and time to symptom resolution in youth with concussion","authors":"Olivia VonDeylen, Enas Alshaikh, Krista Wheeler, Robyn Recker, Paola Malerba, Amy Valasek, Keith Owen Yeates, Jingzhen Yang","doi":"10.1136/bjsports-2024-109058","DOIUrl":"https://doi.org/10.1136/bjsports-2024-109058","url":null,"abstract":"Objective To examine bidirectional associations between objective measures of sleep quantity and quality with postconcussion symptoms (PCS) scores in concussed youth during the first week postinjury and to explore the associations between sleep measures and time to symptom resolution. Study design We conducted a secondary analysis of a prospectively enrolled cohort of youth (11–17 years) with a physician diagnosed concussion within 72 hours of injury. During the first week postconcussion, sleep quantity (time in bed, total sleep time and daytime sleep) and sleep quality (sleep efficiency, WASO and number of awakenings) were measured using an ActiGraph. We evaluated bidirectional temporal associations between the sleep measures and PCS during the first week postinjury using cross-lagged panel models. We assessed the associations between sleep measures and time to symptom resolution using Cox proportional hazard models. Results Participants included 78 concussed youth, 34.6% females, mean age of 14.2 years (SD=2.1). Significant bidirectional associations were observed between PCS and both total sleep time and daytime total sleep in the first week postinjury. Increased daytime sleep was also associated with a decreased likelihood of symptom resolution, adjusted HR (aHR)=0.88, 95% CI=0.78, 0.999. An optimal total sleep time of 418 min per day was associated with a 2.1-fold increased likelihood of symptom resolution (aHR=2.1, 95% CI=1.3, 3.2). Conclusions Clinicians should provide guidance on sleep hygiene, including limiting daytime sleep/naps and getting the appropriate amount of nighttime sleep acutely postconcussion to aid recovery in youth. Data are available upon reasonable request. Dr Yang has full access to all of the study data and takes responsibility for the integrity of the data and the accuracy of the data analysis. The data sets generated and/or analysed during the current study are available from Dr Yang upon reasonable request. Raw data are not available due to parameters indicated in the participant consent materials.","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"69 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is 9 months the sweet spot for male athletes to return to sport after anterior cruciate ligament reconstruction?","authors":"Roula Kotsifaki, Enda King, Roald Bahr, Rod Whiteley","doi":"10.1136/bjsports-2024-108733","DOIUrl":"https://doi.org/10.1136/bjsports-2024-108733","url":null,"abstract":"Objective Most studies examining the time to return to sport (RTS) after anterior cruciate ligament reconstruction (ACLR) do not account for the athlete’s physical readiness. This study aimed to investigate the status of male athletes at 2 years after ACLR, the factors affecting a return to pivoting sports, and the association between time to RTS and subsequent knee injury risk for those athletes who met discharge criteria. Methods We prospectively followed 530 male athletes (mean age 26.7±7.7 years) participating in pivoting sports throughout rehabilitation and at 2 years after ACLR. Pair-wise analyses were conducted to compare athletes who returned to pivoting sports and those who did not. We performed a Cox regression analysis to assess the association between subsequent non-contact or indirect contact knee injuries and time to RTS. Pearson’s χ2 test was used to compare athletes who RTS in ≤9 months to those who RTS in >9 months after ACLR. Results In total, 379 (72%) athletes returned to pivoting sports at 2 years after ACLR. Athletes who completed rehabilitation and met discharge criteria (n=190) were almost 6 times more likely to return to their preinjury sport (OR 5.71; 95% CI 3.39 to 9.62). Of those who did not complete their rehabilitation (n=340), 132 (39%) did not return to pivoting sports. For athletes who met discharge criteria, time to RTS was not associated with the risk of new knee or ACL injury. There was no increased risk for new knee (HR 0.892, 95% CI 0.39 to 2.07, p=0.79) or ACL (HR 0.718, 95% CI 0.24 to 2.17, p=0.56) injury whether athletes returned before or after the 9-month mark following ACLR. Conclusions Completing rehabilitation and meeting objective criteria significantly increased the odds for male athletes to return to pivoting sports. Time to RTS did not impact the risk for a new knee or ACL injury if athletes met objective criteria. Data are available on reasonable request.","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"116 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143506815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sociocultural constructs and sensorimotor control: a scoping review examining implications for anterior cruciate injury","authors":"Katherine F Wilford, Maria Jesus Mena-Iturriaga, Macarena Paz Wainer-Baracatt, Margaret Vugrin, Troy L Hooper, Toby Brooks, C Roger James, Shinye Kim, Gesine H Seeber, Phillip S Sizer","doi":"10.1136/bjsports-2024-108617","DOIUrl":"https://doi.org/10.1136/bjsports-2024-108617","url":null,"abstract":"Objective There is a need to explore the many factors that may have a more subtle influence on, or relationship with, sensorimotor control as it pertains to anterior cruciate ligament injury risk. Due to well-established sex/gender-related differences in sensorimotor control, a close examination of key sociocultural constructs is warranted. This scoping review examined the connection between sociocultural constructs and sensorimotor control. Design Scoping review. Data sources The following databases were searched: PubMed, Embase, Scopus, CINAHL Complete, Academic Search Complete, Pre-Prints Database and Rehabilitation Reference Center from inception to September 2023. Additionally, relevant grey literature was identified. Eligibility criteria for selecting studies Two blinded reviewers independently performed screening, study selection and data extraction. Original references in English, Spanish and German reporting on sociocultural constructs and motor task performance were included. Results Data were extracted from 68 included articles. Stereotype threat, gender and race have been examined more than other sociocultural constructs. Sensorimotor control was assessed in upper and lower quarter tasks and physical activity (PA). Task assessment methods varied, often focusing on task completion or completion speed. It is evident that sociocultural constructs influence sensorimotor control, but the exact mechanism remains unclear. Conclusion Sociocultural constructs can influence sensorimotor control and PA. Future research should further explore this connection as it relates to biomechanical profiles associated with increased injury risk. Additionally, sociocultural construct inventory scores could be added to existing injury screening programmes to create a more gendered approach to risk mitigation. No data are available.","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"27 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applying systems thinking approaches to investigate the complex interrelationships of risk factors affecting acute non-contact lower limb injuries in team sports (PhD Academy Award)","authors":"Nikolaos I Liveris","doi":"10.1136/bjsports-2025-109742","DOIUrl":"https://doi.org/10.1136/bjsports-2025-109742","url":null,"abstract":"The primary purpose of my PhD is to employ systems thinking and system dynamics methodologies to investigate the complex interrelationships among injury risk factors affecting acute non-contact lower-limb injuries, with a particular focus on hamstring injuries. First, I used qualitative Causal Loop Modelling (CLD) to evaluate the ‘bigger picture’ of intrinsic and extrinsic risk factors’ interrelationships that lead to hamstring injury. Second, I employed Partial Least Squares Structural Equation Modelling (PLS-SEM) to quantitatively assess the intrinsic risk factors’ interrelationships and their effects on (1) hamstring injuries and (2) the frequency of all acute non-contact lower limb injuries. As sports injuries, such as hamstring injuries, remain a significant problem,1 the existing evidence provides unclear conclusions regarding the linear association between isolated risk factors and sports injuries.2 For this reason, recent studies have proposed incorporating methodologies that assess the dynamic and complex interrelationships between risk factors and their effects on injury.2 3 However, until now, few studies have investigated sports injuries from a systems-thinking perspective.2 3 Systems-thinking methods such as system dynamics can enhance our understanding of the embedded complexity of sports injuries and provide better solutions for injury prevention.4 First, I conducted a qualitative study to formulate a …","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"14 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unlocking potential: how sport and exercise medicine clinicians can identify and empower neurodiverse athletes","authors":"Dusty Marie Narducci","doi":"10.1136/bjsports-2024-109026","DOIUrl":"https://doi.org/10.1136/bjsports-2024-109026","url":null,"abstract":"Have you ever encountered an athlete who suddenly shouts out or someone who seems disengaged? What was your initial reaction? Did you assume the athlete was being offensive or underperforming that day? Or did you wonder whether they might be neurodiverse? Neurodiversity refers to the natural variations in the human brain that influence how people process information, communicate and engage with their surroundings.1 It includes a range of clinical diagnoses (figure 1A) and emphasises that these conditions are normal variations of the human brain, rather than deficits.1 2 Neurodiverse athletes (NdA) often thrive in sports, leveraging their exceptional skills in attention to detail, pattern recognition, intense focus and heightened sensory awareness. Despite these strengths, they encounter distinct challenges that may not be well understood by sports and exercise medicine (SEM) clinicians, coaches, athlete staff and sporting organisations.2 This editorial aims to empower SEM clinicians to effectively identify and support NdA, particularly individuals with autism spectrum disorder (ASD). Figure 1 Comprehensive support for neurodiverse athletes. Identifying NdA presents several challenges due to stigma, vague definitions under the ’Neurodiversity’ spectrum, scant research, inadequate screening processes and limited access to specialised care through athletic programmes.1 2 The terms Asperger’s syndrome and ‘high-functioning autism’ have fallen out of use. Instead, the preferred terminology is ASD, categorised into three levels according to the amount of support needed, which fits under the broader context of neurodiversity3–5 (figure 1B). NdA may find it challenging to interpret social cues, resulting in misunderstandings or communication difficulties with teammates and athletic personnel. This can lead to feelings of isolation or unintentional exclusion from team bonding activities.6 Additionally, they might feel pressured to conform to neurotypical athlete (NtA) interaction styles, causing stress and forcing them to ‘mask’ their true selves, a …","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":"128 1","pages":""},"PeriodicalIF":18.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical activity and life expectancy: a life-table analysis.","authors":"Lennert Veerman, Jakob Tarp, Ruth Wijaya, Mary Njeri Wanjau, Holger Möller, Fiona Haigh, Peta Lucas, Andrew Milat","doi":"10.1136/bjsports-2024-108125","DOIUrl":"10.1136/bjsports-2024-108125","url":null,"abstract":"<p><strong>Objective: </strong>Low physical activity (PA) levels are associated with increased mortality. Improved measurement has resulted in stronger proven associations between PA and mortality, but this has not yet translated to improved estimates of the disease burden attributable to low PA. This study estimated how much low PA reduces life expectancy, and how much life expectancy could be improved by increasing PA levels for both populations and individuals.</p><p><strong>Methods: </strong>We applied a predictive model based on device-measured PA risk estimates and a life-table model analysis, using a life-table of the 2019 US population based on 2017 mortality data from the National Centre for Health Statistics. The participants included were 40+ years with PA levels based on data from the 2003-2006 National Health and Nutritional Examination Survey. The main outcome was life expectancy based on PA levels.</p><p><strong>Results: </strong>If all individuals were as active as the top 25% of the population, Americans over the age of 40 could live an extra 5.3 years (95% uncertainty interval 3.7 to 6.8 years) on average. The greatest gain in lifetime per hour of walking was seen for individuals in the lowest activity quartile where an additional hour's walk could add 376.3 min (~6.3 hours) of life expectancy (95% uncertainty interval 321.5 to 428.5 min).</p><p><strong>Conclusion: </strong>Higher PA levels provide a substantial increase in population life expectancy. Increased investment in PA promotion and creating PA promoting living environments can promote healthy longevity.</p>","PeriodicalId":9276,"journal":{"name":"British Journal of Sports Medicine","volume":" ","pages":"333-338"},"PeriodicalIF":11.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142615180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}