Sports Medicine and Health Science最新文献_第5页

Two-legged medicine: Exercise-mediated health benefits 两条腿的药：运动介导的健康益处

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-09-01 Epub Date: 2025-07-17 DOI: 10.1016/j.smhs.2025.07.004

Barry A. Franklin

引用次数: 0

Evolution of resistance training in women: History and mechanisms for health and performance 女性抗阻训练的演变：健康和表现的历史和机制

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-09-01 Epub Date: 2025-02-03 DOI: 10.1016/j.smhs.2025.01.005

William J. Kraemer , Maren S. Fragala , Nicholas A. Ratamess

Throughout history, cultural norms and stereotypes have discouraged resistance training in women. Today, as awareness and acceptance of resistance training in women has grown, supported by scientific research and advocacy, more women are achieving health and performance benefits from resistance training. This narrative review discusses the current scientific literature on sexual dimorphisms, the mechanisms underlying health and performance adaptations of resistance training in women, with implications for program design. In general, the physiological adaptations to resistance training in women are mediated largely by the neuroendocrine and immune systems, similar to in men albeit via some distinct predominant pathways involving sex hormones estrogen, testosterone, growth hormone (GH), and insulin-like growth factor- I (IGF-I). As a result, women may have unique adaptations in terms of muscle hypertrophy, substrate utilization, fatiguability, and recovery. Despite subtle physiological differences, women achieve measurable increases in strength, power and athletic performance via engaging in resistance training programs of sufficient frequency, intensity, and duration. Moreover, beyond performance, resistance training has a favorable impact on women’s health including metabolic health, body composition, bone health, cardiovascular health, mental health, self-esteem, and body image. Resistance training recommendations for men and women are highly similar and goal-dependent, with some specific caveats that need to be addressed in women. As resistance training has become regarded as a key element of programs for achieving performance and health improvements in women, additional research may further our understanding.

纵观历史，文化规范和刻板印象阻碍了女性的抗阻训练。今天，在科学研究和宣传的支持下，随着对妇女抗阻训练的认识和接受程度的提高，越来越多的妇女从抗阻训练中获得健康和成绩方面的好处。这篇叙述性综述讨论了目前关于性别二态性的科学文献，女性抗阻训练的健康和表现适应机制，以及对项目设计的影响。一般来说，女性对抗阻训练的生理适应主要是由神经内分泌和免疫系统介导的，与男性相似，尽管通过一些不同的主要途径，包括性激素雌激素、睾酮、生长激素（GH）和胰岛素样生长因子-I （IGF-I）。因此，女性在肌肉肥大、底物利用、疲劳和恢复方面可能具有独特的适应性。尽管存在细微的生理差异，但女性通过参加足够频率、强度和持续时间的抗阻训练项目，在力量、力量和运动表现方面取得了可测量的增长。此外，除了成绩，阻力训练对女性的健康也有良好的影响，包括代谢健康、身体成分、骨骼健康、心血管健康、心理健康、自尊和身体形象。针对男性和女性的抗阻训练建议是高度相似的，目标依赖的，需要针对女性提出一些具体的警告。由于抗阻训练已被视为提高女性表现和改善健康状况的关键因素，进一步的研究可能会进一步加深我们的理解。

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引用次数: 0

Health benefits of physical activity: What role does skeletal muscle-organ crosstalk play? 体育活动对健康的益处：骨骼肌器官相声扮演什么角色？

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-09-01 Epub Date: 2025-02-28 DOI: 10.1016/j.smhs.2025.02.010

Scott K. Powers , Erica Goldstein , Ronette Lategan-Potgieter , Matthew Schrager , Michele Skelton , Haydar Demirel

The observation that physical activity (PA) reduces the risk of coronary heart disease dates back more than 70 years ago and it is now established that regular PA reduces all-cause mortality, in part, by reducing the risk of numerous chronic diseases including coronary heart disease, stroke, cancer, type 2 diabetes, and Alzheimer's disease. During the past decade the increased use of activity tracking devices has significantly improved our understanding of the dose-response relationships between PA and all-cause mortality. Further, our appreciation of the impact that prolonged sitting has on all-cause mortality has increased. Moreover, new research provides key insight into the signaling mechanisms that connect PA to the reduced risk of disease in multiple organ systems. Therefore, given the recent advances in the study of PA and all-cause mortality, it is an appropriate time to review the latest evidence on this topic as well as the mechanisms responsible for the PA-induced protection against all-cause mortality. Therefore, this review will summarize recent data on the dose-response association between PA on all-cause mortality and the negative impact that sedentary behavior has on all-cause mortality. Further, we also highlight potential mechanisms linking PA with the reduced risk of developing several chronic diseases. Finally, we conclude with a brief discussion of the emerging evidence that the health benefits associated with PA are derived, in part, from skeletal muscle-organ crosstalk involving muscle produced hormones (myokines) that exert their effects in either an autocrine, paracrine, or endocrine manner.

体育活动（PA）降低冠心病风险的观察可以追溯到70多年前，现在已经确定，定期体育活动可以降低全因死亡率，部分原因是通过降低许多慢性疾病的风险，包括冠心病、中风、癌症、2型糖尿病和阿尔茨海默病。在过去的十年中，活动追踪设备的使用增加，大大提高了我们对PA和全因死亡率之间的剂量反应关系的理解。此外，我们越来越认识到久坐对全因死亡率的影响。此外，新的研究提供了将PA与多器官系统疾病风险降低联系起来的信号机制的关键见解。因此，鉴于PA和全因死亡率研究的最新进展，现在是回顾这一主题的最新证据以及PA诱导的预防全因死亡率的机制的合适时机。因此，本综述将总结最近关于PA对全因死亡率的剂量-反应关系以及久坐行为对全因死亡率的负面影响的数据。此外，我们还强调了PA与降低几种慢性疾病风险之间的潜在机制。最后，我们简要讨论了与PA相关的健康益处部分来自骨骼肌器官的相互作用，其中涉及肌肉产生的激素（肌因子），这些激素以自分泌、旁分泌或内分泌的方式发挥作用。

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引用次数: 0

Effects of amount, intensity, and mode of exercise training on the metabolic syndrome: A narrative review 运动训练的量、强度和模式对代谢综合征的影响：一项叙述性综述

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-09-01 Epub Date: 2025-03-19 DOI: 10.1016/j.smhs.2025.03.006

Garrett A. Moseley , Katherine A. Collins-Bennett , William E. Kraus , Leanna M. Ross

Purpose

The purpose of this narrative review is to: 1) summarize findings from the three Studies of a Targeted Risk Reduction Intervention through Defined Exercise (STRRIDE) randomized trials regarding the differential effects of exercise amount, intensity, and mode on metabolic syndrome (MetS); and 2) compare the STRRIDE findings with other published randomized exercise trials related to changes in MetS.

Methods

A literature review was performed to investigate the effects of exercise on composite measures of MetS. PubMed was searched between October 2023 and December 2023. To be included in this review, studies must have employed a randomized study design, whereby exercise amount, intensity, or mode was varied.

Results

Findings from the STRRIDE trials and other randomized exercise trials suggest: 1) there is a relationship between exercise energy expenditure (ExEE) and improvements in composite measures of MetS; 2) there may be an asymptotic effect for ExEE beyond which further improvements in MetS are negligible or counterproductive; 3) improvements in composite measures of MetS are closely linked to insulin sensitivity; and 4) without controlling for total ExEE, combined aerobic and resistance training interventions offer the most robust improvements for composite MetS outcomes compared to either mode alone.

Conclusion

Additional, large-scale, randomized exercise trials should be designed to investigate the potential asymptotic effect and associated threshold for ExEE, the interaction between exercise intensity and baseline insulin sensitivity, and the independent effects of exercise mode on MetS.

目的：本综述的目的是：1)总结三项通过限定运动（STRRIDE）进行的靶向风险降低干预的随机试验的结果，研究运动量、强度和运动方式对代谢综合征（MetS）的不同影响；2)将STRRIDE研究结果与其他已发表的与MetS变化相关的随机运动试验进行比较。方法通过文献综述，探讨运动对代谢当量综合指标的影响。PubMed在2023年10月至2023年12月之间进行了搜索。要纳入本综述，研究必须采用随机研究设计，其中运动量，强度或模式是不同的。STRRIDE试验和其他随机运动试验的结果表明：1)运动能量消耗（ExEE）与代谢当量（MetS）综合指标的改善之间存在关系；2) ExEE可能存在渐近效应，超过此效应，MetS的进一步改善可以忽略不计或适得其反；3)代谢当量复合指标的改善与胰岛素敏感性密切相关；4)在不控制总ExEE的情况下，与单独的任何一种模式相比，有氧和阻力训练相结合的干预措施对复合MetS结果的改善最为显著。结论：应该设计更多的大规模随机运动试验来研究ExEE的潜在渐近效应和相关阈值，运动强度与基线胰岛素敏感性之间的相互作用，以及运动方式对MetS的独立影响。

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引用次数: 0

Strength development following a six-week risk reduction athletic development training program in men and women 在男性和女性进行为期六周的风险降低运动发展训练项目后的力量发展

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-07-01 Epub Date: 2024-09-12 DOI: 10.1016/j.smhs.2024.09.004

Christopher J. Cleary , Krisha Crane , Lisa M. Vopat , Bryan G. Vopat , Ashley A. Herda

This study retrospectively evaluated data from an athlete management system on the impact of a 6-week, 12-session risk-reduction athletic development training program on maximal isometric strength in post-rehabilitative and healthy men and women. Maximal isometric quadriceps and hamstrings strength were evaluated bilaterally before and after the training program. Out of 55 athletes that had participated in the program, a total of 37 athletes' (13–28 years old) recorded outcomes were utilized in analyses. Thirty-one athletes had undergone rehabilitation (post-rehabilitative athletes) after orthopedic knee surgeries. Six athletes with no previous surgeries performed (healthy athletes) also completed the 6-week program. Repeated measures analyses of variance (leg × time) assessed changes in quadriceps and hamstrings strength at an alpha of p ≤ 0.05. There was a main effect for time where the post-rehabilitative athletes’ quadriceps and hamstrings strength increased by (mean difference ± standard error) (4.2 ± 0.7) kg (p < 0.01) and (4.5 ± 0.9) kg (p < 0.01) respectively, with legs (operative [OP]) and non-operative [NOP]) combined. With time points combined, the OP limb was weaker than the NOP limb for quadriceps strength by (2.9 ± 0.7) kg (p < 0.01) with no differences in hamstrings strength. For the healthy athletes, there were no changes for quadriceps strength and hamstring strength improved across time by (5.3 ± 1.4) kg (p = 0.01) with legs combined.

In conclusion, there were improvements in post-rehabilitative and healthy athletes’ isometric strength after the training program. However, between-limb strength asymmetries were still apparent in the post-rehabilitation cohort.

本研究回顾性评估了来自运动员管理系统的数据，分析了6周、12期降低风险的运动发展训练计划对康复后和健康男性和女性最大等长力量的影响。最大等长股四头肌和腘绳肌力量在训练计划前后进行评估。在参与该项目的55名运动员中，共有37名运动员（13-28岁）的记录结果被用于分析。31名运动员在膝关节矫形手术后接受了康复治疗。6名以前没有做过手术的运动员（健康运动员）也完成了为期6周的项目。重复测量方差分析（腿×时间）评估股四头肌和腘绳肌力量的变化，alpha值为p≤0.05。在康复后运动员股四头肌和腘绳肌力量增加的时间上存在主效应（平均差±标准误差）（4.2±0.7）kg (p <；0.01)和（4.5±0.9）kg (p <；0.01)，腿部（手术[OP]和非手术[NOP]）合并。结合时间点，OP肢的股四头肌力量弱于NOP肢（2.9±0.7）kg (p <；0.01)，腘绳肌力量无差异。对于健康运动员，股四头肌力量和腘绳肌力量随时间的变化没有变化（5.3±1.4）kg （p = 0.01）。综上所述，训练计划对康复后和健康运动员的等长肌力有改善。然而，在康复后队列中，肢间力量不对称仍然很明显。

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引用次数: 0

Exercise self-efficacy in older adults with metabolic-associated fatty liver disease: A latent profile analysis 患有代谢相关性脂肪肝的老年人的运动自我效能：潜在特征分析

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-07-01 Epub Date: 2024-05-09 DOI: 10.1016/j.smhs.2024.05.001

Huimin Zhou , Haiyan Chen , Di Wu , Hanxiao Lu , Bo Wu , Zhixia Dong , Jun Yang

China has a high prevalence rate of Metabolic-associated fatty liver disease (MAFLD), and there is currently limited understanding of the levels of exercise self-efficacy (ESE) among individuals with MAFLD. The objective was to explore the potential ESE patterns in older adults with MAFLD. A cross-sectional study was conducted on 800 older adults with fatty liver disease from five communities from April 20, 2023 to August 15, 2023. Latent profile analysis (LPA) and k-means clustering were used to determine the optimal number of ESE groups. Using univariate analysis and multivariate logistic regression to investigate the factors influencing profiles of ESE. A sample of 775 subjects met the diagnostic criteria for MAFLD. LPA yielded three profiles: the low-ESE, mild-ESE, and high-ESE groups, which comprised 25%, 28%, and 47% of the sample, respectively. K-means clustering further supported the categorization of ESE into three distinct classes. The multivariate logistic regression analysis revealed that diabetes, arthritis and/or arthrosis, as well as companionship during PA were significant influencing factors for the different profiles (p < 0.05). Our findings suggest that the ESE of older patients with MAFLD is primarily at a moderate level or above. There was population heterogeneity in ESE among older patients with MAFLD. Diabetes mellitus, arthritis, and/or arthrosis, as well as companionship during PA were significant factors in influencing the likelihood of having high ESE.

中国代谢性脂肪性肝病（MAFLD）的患病率很高，目前对MAFLD患者的运动自我效能（ESE）水平的了解有限。目的是探讨老年MAFLD患者的潜在ESE模式。本研究于2023年4月20日至2023年8月15日对来自5个社区的800名老年脂肪肝患者进行了横断面研究。使用潜在剖面分析（LPA）和k-means聚类来确定ESE组的最佳数量。采用单因素分析和多因素logistic回归分析探讨了影响ESE分布的因素。775名受试者符合MAFLD的诊断标准。LPA产生了三种概况：低ese，轻度ese和高ese组，分别占样本的25%，28%和47%。K-means聚类进一步支持将ESE分类为三个不同的类别。多因素logistic回归分析显示，糖尿病、关节炎和/或关节病以及PA期间的陪伴是不同情况的显著影响因素(p <；0.05)。我们的研究结果表明，老年mald患者的ESE主要处于中等或以上水平。老年MAFLD患者的ESE存在人群异质性。糖尿病、关节炎和/或关节病以及PA期间的陪伴是影响高ESE可能性的重要因素。

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引用次数: 0

Objectively measured 24-h movement behaviours of child-guardian pairs in low-to-middle income households in Nairobi City County, Kenya 客观测量肯尼亚内罗毕市县中低收入家庭中儿童与监护人的 24 小时活动行为

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-07-01 Epub Date: 2025-01-31 DOI: 10.1016/j.smhs.2025.01.008

Lucy-Joy Wachira , Nils Swindell , Noora Kanerva , Muhoro Munuhe , Timo Vuorimaa , Tiina Laiho , Sophie Ochola , Maijaliisa Erkkola , George Owino , Gareth Stratton , Mikael Fogelholm , Vincent Onywera

Background

The decreasing prevalence of physical activity (PA) among urban children in Sub-Saharan Africa is a growing public health concern. More emphasis should focus on examining the influence of parental PA behaviour on the children’s PA patterns. We explored associations of 24 hour (h) accelerometer-measured movement behaviours of guardian-child pairs in Nairobi City County, Kenya.

Methods

This cross-sectional study assessed 80 pairs consisting of children aged 9–14 years and their guardians in one area of low and one area of middle socioeconomic status (SES) (Embakasi Sub-County and Lang’ata Sub-County), in Nairobi City County, Kenya. The study used waist worn Tri-axial Actigraph (GT3X+ and ActiSleep+) accelerometers to quantify PA and sedentary time (SED). Association between guardians' and children’s PA was examined using linear regression, adjusting for guardians' educational attainment and household wealth.

Results

Of the children, 42 (52.5%) and 76 (96.2%) of the guardians were women. Children in low SES areas spent more time (p < 0.001) in moderate-to-vigorous physical activity compared to children from middle SES area. The guardians in low SES area were younger and spent more time in light PA (p = 0.036) while their counterparts had higher daily SED (p = 0.049). Guardian’s SED associated with higher children’s SED (p = 0.033) even after adjusting for guardians' educational attainment (p = 0.032) and wealth (p = 0.05). There was no association between guardians' and children’s MVPA.

Conclusion

Considered alongside the extant literature, these results suggest that health promotion strategies should aim to reduce parental SED time while also planning to increase children’s PA.

背景：撒哈拉以南非洲城市儿童身体活动（PA）流行率的下降是一个日益严重的公共卫生问题。更多的重点应放在检查父母的PA行为对儿童PA模式的影响。我们探讨了肯尼亚内罗毕市县的监护儿童对24小时(h)加速度计测量的运动行为的关联。方法采用横断面研究方法，对肯尼亚内罗比市县一个社会经济地位较低和中等地区（Embakasi县和Lang 'ata县）的80对9-14岁儿童及其监护人进行评估。该研究使用腰戴式三轴活动仪（GT3X+和ActiSleep+）加速度计来量化PA和久坐时间（SED）。在调整了监护人的受教育程度和家庭财富后，采用线性回归检验了监护人与子女PA之间的关系。结果儿童中女性占42人（52.5%），女性占76人（96.2%）。低社会经济地位地区的儿童花更多的时间(p <；与来自中等社会经济地位地区的儿童相比，中等至高强度体育活动的儿童患病率为0.001)。低SES区的监护人年龄更小，在轻度环境中花费的时间更多（p = 0.036），而其同伴的日SED更高（p = 0.049）。即使在调整了监护人的受教育程度（p = 0.032）和财富（p = 0.05）后，监护人的SED与较高的儿童SED相关（p = 0.033）。监护人和儿童的MVPA之间没有关联。结论结合现有文献，这些结果表明，健康促进策略应以减少父母SED时间为目标，同时计划增加儿童PA。

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引用次数: 0

Preschool-aged children 24-hour movement behaviours before and during COVID-19 学龄前儿童在 COVID-19 之前和期间的 24 小时运动行为

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-07-01 Epub Date: 2024-09-05 DOI: 10.1016/j.smhs.2024.09.001

Mingming Cui , Xiaojuan Wang , Zhaoxu Lu , Anthony D. Okely , Katharina Kariippanon , Ellie K. Taylor , Ting Zhang , Hongyan Guan

The coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) affected health, economies, and lifestyles, but little is known about its impact on children. We aimed to investigate changes in 24-hour (h) movement behaviours of pre-school children before and during COVID-19, and factors that influenced these. Children aged 3–6 years were recruited in Beijing in 2019, and their movement behaviours over 24 h assessed by questionnaire, as part of the International Study of Movement Behaviors in the Early Years (SUNRISE) study. We conducted the survey again during COVID-19, and compared the children’s movement behaviours before and during COVID-19 and associated factors. Overall, 196 parents completed the survey at both time points. The percentage of children meeting movement guidelines decreased during the pandemic (p < 0.01). Total physical activity decreased less among children getting good quality sleep or with more adults in the household (p < 0.01). Children who were not cared for primarily by their mother had a greater decrease in moderate to vigorous intensity physical activity (p = 0.02), but the decrease was smaller among children whose parents used the internet to support their physical activity and/or screen time (p < 0.05). Children who used electronic screen devices in the 2 h before bedtime or whose parents reported body temperature in webchats had a greater increase in sedentary screen time (p < 0.05). Children spending more time outdoors showed a smaller decrease in sleep (p < 0.01). Overall, children’s movement behaviours changed significantly during the pandemic.

由严重急性呼吸系统综合征冠状病毒 2（SARS-CoV-2）引起的 2019 年冠状病毒病（COVID-19）大流行影响了健康、经济和生活方式，但人们对其对儿童的影响知之甚少。我们的目的是调查学龄前儿童在 COVID-19 之前和期间 24 小时运动行为的变化，以及影响这些变化的因素。我们于2019年在北京招募了3-6岁的儿童，并通过问卷调查评估了他们在24小时内的运动行为，这是国际幼儿运动行为研究（SUNRISE）的一部分。我们在 COVID-19 期间再次进行了调查，并比较了儿童在 COVID-19 之前和期间的运动行为及相关因素。共有 196 名家长在两个时间点完成了调查。在大流行期间，符合运动准则的儿童比例有所下降（p < 0.01）。在睡眠质量较好或家中有较多成人的儿童中，总体力活动量的下降幅度较小（p < 0.01）。不是主要由母亲照顾的儿童的中等强度到剧烈强度的体力活动量减少较多（p = 0.02），但父母使用互联网支持其体力活动和/或屏幕时间的儿童的体力活动量减少较少（p < 0.05）。在睡前 2 小时使用电子屏幕设备或父母在网络聊天中报告体温的儿童，其久坐屏幕时间增加较多（p < 0.05）。户外活动时间较多的儿童睡眠减少的幅度较小（p < 0.01）。总体而言，儿童的运动行为在大流行期间发生了显著变化。

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引用次数: 0

Assessing fundamental movement skills using the Test of Gross Motor Development (TGMD): Challenges and solutions to comparability and standardization 使用粗大运动发育测试（TGMD）评估基本运动技能：可比性和标准化的挑战与解决方案

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-07-01 Epub Date: 2025-02-26 DOI: 10.1016/j.smhs.2025.02.007

Johan Y.Y. Ng, Shan Jiang, Cecilia H.S. Chan, Amy S. Ha

Proficiency in fundamental movement skills in children is linked to numerous positive physical, behavioral, and cognitive outcomes. The Test of Gross Motor Development is a widely used tool in research to measure this outcome. However, its application faces several limitations and challenges, such as subjectivity in rater judgements, limitation in data precision, and inconsistencies in score aggregations. In this commentary, we discuss these issues and explore how new technology might help address some of the challenges. Nonetheless, a consensus to how scores should be aggregated is still needed, and this could only be achieved through further discussions among researchers in the field.

儿童对基本运动技能的熟练程度与许多积极的身体、行为和认知结果有关。大肌肉运动发展测试是研究中广泛使用的测量这一结果的工具。然而，它的应用面临着一些限制和挑战，如评分判断的主观性、数据精度的局限性以及分数聚合的不一致性。在这篇评论中，我们讨论了这些问题，并探讨了新技术如何帮助解决一些挑战。尽管如此，对于如何汇总分数仍然需要达成共识，这只能通过该领域研究人员之间的进一步讨论来实现。

引用次数: 0

Corticospinal tract alterations after ankle sprain in adolescence: Insights from the mouse model 青春期踝关节扭伤后皮质脊髓束的改变：小鼠模型的启示

IF 2.3 Q2 SPORT SCIENCES

Sports Medicine and Health Science

Pub Date : 2025-07-01 Epub Date: 2024-06-16 DOI: 10.1016/j.smhs.2024.06.006

Xiao'ao Xue , Xicheng Gu , Yuwen Zhang , Xuejun Wu , Tian Xia , Rong Lu , He Wang , Yinghui Hua

Purpose

Lateral ankle sprains (LAS) are associated with corticospinal pathway deficits. Existing evidence is primarily based on cross-sectional investigations and noncausal speculations. This study aims to determine whether maladaptive corticospinal pathway alterations occur pre- and postligament transection in LAS mouse models. Additionally, this study explores whether the alterations are more pronounced in adolescent mice than adults.

Methods

Twenty-four 8-week-old adolescent and twenty-four 24-week-old adult mice were randomly assigned to lateral ankle ligament transection or sham surgery. Diffusion-weighted imaging of the corticospinal pathway was performed presurgery and 8 weeks postsurgery. Fractional anisotropy (FA) values, reflecting fiber integrity within the corticospinal subregions of the medulla, pons, midbrain, and cerebrum, were extracted.

Results

Overall, 41 mice completed repeated image acquisition. Before surgery, no significant group effects on FA within the four corticospinal subregions were detected in either adolescent or adult mice. Two months after surgery, the adolescent cohort displayed a significant reduction in FA in the medulla subregion following ankle ligament transection (β-baseline-adjusted = −0.083, 95% CI, −0.145 to −0.021, p-corrected = 0.048). Conversely, no significant effects of ankle ligament transection on corticospinal FA were observed in the adult cohort.

Conclusion

The maladaptive alterations in the corticospinal tract could be observed in the adolescent LAS mouse model, characterized by reduced fiber integrity in the medulla subregion. While these results are derived from an animal model, they provide a foundation for future investigations into the mechanisms underlying neurological deficits following musculoskeletal injuries.

目的：外侧踝关节扭伤（LAS）与皮质脊髓通路缺陷有关。现有的证据主要是基于横断面调查和非因果推测。本研究旨在确定LAS小鼠模型中韧带横断前和韧带横断后是否会发生适应性不良的皮质脊髓通路改变。此外，本研究还探讨了这种变化在青春期小鼠中是否比成年小鼠更明显。方法将24只8周龄的青春期小鼠和24只24周龄的成年小鼠随机分为踝关节外侧韧带横断组和假手术组。术前和术后8周对皮质脊髓通路进行弥散加权成像。提取分数各向异性（FA）值，反映髓质、脑桥、中脑和大脑皮质脊髓亚区纤维的完整性。结果41只小鼠完成了重复图像采集。手术前，在青春期或成年小鼠中，未检测到四个皮质脊髓亚区对FA的显著组效应。手术后两个月，青少年队列显示踝关节韧带横断后髓质亚区FA显著减少（β-基线校正= - 0.083,95% CI, - 0.145至- 0.021，p校正= 0.048）。相反，在成人队列中没有观察到踝关节韧带横断对皮质脊髓FA的显著影响。结论青少年LAS小鼠模型存在皮质脊髓束的不适应改变，表现为髓质亚区纤维完整性降低。虽然这些结果来自动物模型，但它们为未来研究肌肉骨骼损伤后神经功能缺陷的机制提供了基础。

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引用次数: 0