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One minute of stair climbing and descending reduces postprandial insulin and glucose with 3-min improving insulin resistance following a mixed meal in young adults: A Randomized Controlled Crossover Trial 爬楼梯和下楼梯 1 分钟可降低餐后胰岛素和血糖,3 分钟可改善年轻人混合餐后的胰岛素抵抗:随机对照交叉试验
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-18 DOI: 10.1016/j.jesf.2024.03.004
Jeff M. Moore , Hannah Salmons , Cameron Vinoskey , Shirin Hooshmand , Jochen Kressler

Background

Glycemic markers, including postprandial glucose, insulin, and insulin resistance, are strong predictors of morbidity and mortality in individuals with and without diabetes. Stair-climbing and -descending (SCD) at a comfortable pace for 3 minutes after a sugary beverage (300 kilocalories; 100% carbohydrate) lowers insulin, with insulin sensitivity improving in 10 minutes. If similar benefits are seen following consumption of a mixed meal is unknown. We hypothesize SCD will improve these markers in a dose-response manner following a mixed meal.

Methods

In a randomized, controlled, crossover trial, young adults (N = 31) performed SCD for 0 (seated control), 1, 3, and 10 minutes after a mixed meal (650 kilocalories; 53% carbohydrates, 33% fat, and 14% protein). Differences in glucose, insulin, and insulin sensitivity (ISI) from baseline to 30 min were analyzed using a mixed-effects ANOVA.

Results

A significant fixed-effect was found for change in glucose [F(2.551,67.17) = 4.724,p = 0.007)], insulin [F(2.692,74.49) = 11.28,p < 0.001)], and ISI [F(2.127,56.00) = 5.848,p = 0.004)]. Compared to the seated control (0 minutes), changes in glucose were lower after 1 minute (−14.0 (−7.2)mg/dL,p < 0.001), 3 minutes (−18.4 (−7.0)mg/dL,p = 0.0007), and 10 minutes (−10.0 (−8.1)mg/dL,p = 0.039); changes in insulin were lower after 1 minute (−1.8 (−0.9)μIU/mL,p = 0.0011), 3 minutes (−2.8 (−0.9)μIU/mL,p < 0.001), and 10 minutes (−1.1 (−0.9)μIU/mL,p = 0.033); and changes in ISI were significantly higher after 3 minutes (2.4 (1.5),p < 0.001) and 10 minutes (1.3 (1.6),p = 0.014) but not 1 minute (1.2 (1.5),p = 0.059).

Conclusion

Postprandial glucose and insulin improved with 1 minute, and insulin resistance improved with 3 minutes, of SCD at a self-selected, comfortable pace, after consumption of a mixed meal in apparently healthy young adults.

Protocol

Trial registration: ClinicalTrials.gov Identifier: NCT04232475.

血糖指标,包括餐后血糖、胰岛素和胰岛素抵抗,是预测糖尿病患者和非糖尿病患者发病率和死亡率的重要指标。在饮用含糖饮料(300 千卡热量;100% 碳水化合物)后以舒适的速度爬楼梯和下楼梯(SCD)3 分钟,可改善胰岛素,胰岛素敏感性在 10 分钟内得到改善。至于在进食混合餐后是否也能获得类似的益处,目前还不得而知。我们假设 SCD 将以剂量反应的方式改善混合餐后的这些指标。在一项随机对照交叉试验中,年轻成人(N = 31)在混合餐(650 千卡热量;53% 碳水化合物、33% 脂肪和 14% 蛋白质)后 0 分钟(坐位对照)、1 分钟、3 分钟和 10 分钟内进行 SCD。采用混合效应方差分析法分析了血糖、胰岛素和胰岛素敏感性(ISI)从基线到 30 分钟的差异。结果发现,葡萄糖[F(2.551,67.17) = 4.724,p = 0.007)]、胰岛素[F(2.692,74.49) = 11.28,p < 0.001)]和 ISI [F(2.127,56.00) = 5.848,p = 0.004)]的变化具有明显的固定效应。与坐位对照组(0 分钟)相比,葡萄糖的变化在 1 分钟(-14.0 (-7.2)mg/dL,p < 0.001)、3 分钟(-18.4 (-7.0)mg/dL,p = 0.0007)和 10 分钟(-10.0 (-8.1)mg/dL,p = 0.039)后较低;胰岛素的变化在 1 分钟(-1.8 (-0.9)μIU/mL.1, p = 0.039)后较低。9)μIU/mL,p = 0.0011)、3 分钟(-2.8 (-0.9)μIU/mL,p < 0.001)和 10 分钟(-1.1 (-0.9)μIU/mL,p = 0.033);3 分钟(-2.4 (-1.5),p < 0.001)和 10 分钟(-1.3 (-1.6),p = 0.014)后 ISI 变化较大,但 1 分钟(-1.2 (-1.5),p = 0.059)后 ISI 变化不大。表面上健康的年轻人在进食混合餐后以自选的舒适速度进行 1 分钟的 SCD 运动,餐后血糖和胰岛素会得到改善,而 3 分钟的 SCD 运动则会改善胰岛素抵抗。试验注册:标识符:NCT04232475:NCT04232475。
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引用次数: 0
Return to play of young and adult professional athletes after COVID-19: A scoping review 年轻和成年职业运动员在 COVID-19 后重返赛场:范围审查
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-18 DOI: 10.1016/j.jesf.2024.03.005
Nicola Ceglie, Annamaria Petito, Giuseppe Cibelli

Background/objective

Given the persistence of COVID-19 under various facets and mutations, there is an urgent need to understand the debate on a safe return to play for professional athletes (young and adults) recovering from the infection. This work offers a scoping and comprehensive review on the topic during the first two years of the pandemic event by providing an identification of main clusters of research, relevant gaps and significant insights for future investigation.

Methods

The literature is selected using the search engines of: PubMed®, SCIENCEDIRECT, and SCOPUS. Further criteria for selection are: Time range of 2020–2022; Scope: Return to play of professional athletes recovering from COVID-19 infection; 3) Types of publications: Research papers, reviews, practice guidelines, case reports; 4) Language: English. Two independent researchers performed a quality check on a random sample (n = 30%) of publications.

Results

Main results reveal four research clusters deepening the analysis on: myocarditis, cardiac diseases and return to play, training and rehabilitation, mass screening and risk assessment, and sport and bio-psycho-social sphere for a safe return to play. Major collaborations occur between UK-South Africa, UK-USA, USA-Canada, and USA-Australia.

Conclusions

Important gaps refer to a lack of investigation on a safe return to play for female athletes in mostly all sports disciplines; on the other hand, sport and the bio-psycho-social sphere of the athlete is a fast-growing topic. Both deserve further attention in the immediate future to improve ad-hoc sport and exercise practices.

背景/目的鉴于 COVID-19 在不同方面和变异情况下的持续存在,迫切需要了解关于职业运动员(青年和成年)感染后安全重返赛场的讨论。这项工作通过确定主要研究集群、相关差距和对未来调查的重要启示,对大流行病事件头两年期间的这一主题进行了范围界定和全面回顾:PubMed®、SCIENCEDIRECT 和 SCOPUS。其他选择标准包括时间范围为 2020-2022 年;范围:职业运动员感染 COVID-19 后重返赛场;3)出版物类型:3) 出版物类型:研究论文、综述、实践指南、病例报告; 4) 语言:英语:4) 语言:英语。两名独立研究人员对随机抽样(n = 30%)的出版物进行了质量检查。结果主要结果显示了四个研究集群,深化了对以下方面的分析:心肌炎、心脏疾病和重返赛场、训练和康复、大规模筛查和风险评估,以及安全重返赛场的体育和生物-心理-社会领域。英国-南非、英国-美国、美国-加拿大和美国-澳大利亚之间开展了主要合作。结论重要的差距在于缺乏对所有运动项目的女运动员安全重返赛场的调查;另一方面,运动和运动员的生物-心理-社会领域是一个快速发展的课题。在不久的将来,这两方面都值得进一步关注,以改善临时的体育锻炼做法。
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引用次数: 0
Physical fitness levels and trends of kindergarteners in Hong Kong during the COVID-19 pandemic COVID-19大流行期间香港幼儿园学生的体能水平和趋势
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-18 DOI: 10.1016/j.jesf.2024.03.003
Ming Yu Claudia Wong , Kai-ling Ou , Wing Sum Wong , Sze Sze Hon , Pak Kwong Chung

Background/objectives

The study aimed to examine the physical fitness and activity levels of kindergarteners in Hong Kong during the coronavirus disease 2019 pandemic.

Methods

A total of 2052 kindergarteners (48% girls; 32.9% Grade 1, 34% Grade 2, and 33.1% Grade 3) were recruited from July 2020 to November 2021. Participants completed the physical fitness tests, including body composition, flexibility, lower-limb muscle strength, upper-limb muscle strength, lower-limb muscle endurance, and agility. Children's physical activity and overall well-being were examined using parental proxy reports. Parents also reported their physical activity and parental support to children's physical activity engagement, as well as their perception of children's kindergarten physical activity environment. Fitness differences by age and gender were analyzed using one-way ANOVA and ANCOVA measuring effect size with partial eta-squared. Additionally, correlations assessed the relationship between children's fitness and parents' proxy reports.

Results

The results of the physical fitness tests were higher than those in previous studies conducted by the Physical Fitness Association of Hong Kong in 2015–2018. Gender-based differences were observed in most tests for children aged 4 years and older, with boys showing higher scores in the standing long jump, shot put, and balance tests, while girls had higher scores in the sit-and-reach test. Parents' proxy questionnaire answers indicated that children's continuous jump test performances were significantly related to their frequency of physical activity per week (r = 0.19, p < 0.001), and that children's health was significantly and positively correlated with their fitness level (r = 0.179, p < 0.009). Inadequate school physical activity was associated with poor upper-limb strength (r = 0.078, p < 0.005). Moreover, a high level of parental support for their children's participation in physical activity was correlated with a high level of parental participation in vigorous-intensity physical activities (r = 0.167, p < 0.005).

Conclusion

The physical fitness of children in Hong Kong was less affected by the epidemic. Parents' healthy behaviors and support were related to children's participation in PA. Efforts to improve children's physical fitness and motor development should include parent education and physical activity involvement.

背景/目的本研究旨在探讨香港幼儿园学生在2019年冠状病毒病流行期间的体能和活动水平。方法在2020年7月至2021年11月期间,共招募了2052名幼儿园学生(48%为女生;32.9%为一年级学生,34%为二年级学生,33.1%为三年级学生)。参与者完成了体能测试,包括身体成分、柔韧性、下肢肌力、上肢肌力、下肢肌耐力和敏捷性。通过家长代理报告对儿童的体育活动和总体健康状况进行了调查。家长还报告了他们的体育锻炼情况和家长对儿童体育锻炼的支持情况,以及他们对儿童幼儿园体育锻炼环境的看法。采用单因素方差分析和方差分析对不同年龄和性别的体能差异进行了分析,方差分析使用部分等方差来测量效应大小。此外,相关性评估了儿童体适能与家长代理报告之间的关系。结果体适能测试结果高于香港体适能协会在2015-2018年进行的以往研究。在大多数测试中,4岁及以上儿童的体质均存在性别差异,其中男孩在立定跳远、铅球和平衡测试中得分较高,而女孩则在坐位体前屈测试中得分较高。家长的代理问卷答案显示,儿童的连续跳远测试成绩与他们每周的体育活动频率有显著关系(r = 0.19,p <0.001),儿童的健康状况与他们的体能水平有显著的正相关关系(r = 0.179,p <0.009)。学校体育活动不足与上肢力量不足有关(r = 0.078,p <0.005)。此外,父母对子女参加体育活动的支持程度高与父母参加剧烈体育活动的程度高相关(r = 0.167, p < 0.005)。家长的健康行为和支持与儿童参与体育锻炼有关。改善儿童体能和运动发展的工作应包括家长教育和体育活动的参与。
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引用次数: 0
24-H movement behaviors and physical fitness in preschoolers: A compositional and isotemporal reallocation analysis 学龄前儿童的 24 小时运动行为和体能:构成和等时再分配分析
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-15 DOI: 10.1016/j.jesf.2024.03.002
Huiqi Song , Patrick W.C. Lau , Jingjing Wang , Yunfei Liu , Yi Song , Lei Shi

Background/Objectives

This study examined the relationships between 24-h movement behaviors and physical fitness (PF) in preschool children.

Methods

The study was conducted on 474 children aged 3–6 years in Zhuhai. Physical activity (PA) and sedentary behavior (SB) were collected by the accelerometer, and sleep time was assessed through the parent-report questionnaire. Balance, cardiorespiratory fitness (CRF), flexibility, muscle strength, muscular endurance, and speed-agility were measured using a balance beam test, 20 m shuttle run test, sit and reach test, handgrip test, sit-ups, and 4 × 10 m shuttle run test respectively. The compositional data analysis was used to examine the association between 24-h movement behaviors and PF, and the compositional isotemporal substitution analysis was used for the time reallocation.

Results

The daily composition, adjusted for age, gender, and body mass index (BMI), was significantly associated with CRF (p < 0.001, r2 = 0.20), flexibility (p < 0.001, r2 = 0.07), muscular strength (p < 0.001, r2 = 0.37), muscular endurance (p < 0.001, r2 = 0.26), and speed-agility (p < 0.001, r2 = 0.26). The addition of moderate-to-vigorous PA (MVPA) at the expense of SB and sleep, MVPA at the cost of sleep, was associated with significant muscular strength and speed-agility improvements respectively. The impact of SB and sleep replacing MVPA is stronger than MVPA replacing SB and sleep on muscular strength.

Conclusion

These findings offer useful insight for the replacement of movement behaviors within the recommended range to facilitate PF development in early childhood.

背景/目的:本研究探讨了学龄前儿童 24 小时运动行为与体能(PF)之间的关系。 方法:本研究以珠海市 474 名 3-6 岁儿童为对象。通过加速度计收集体力活动(PA)和久坐行为(SB),通过家长报告问卷评估睡眠时间。平衡能力、心肺功能(CRF)、柔韧性、肌肉力量、肌肉耐力和速度-敏捷性分别通过平衡木测试、20 米往返跑测试、坐位体前屈、手握力测试、仰卧起坐和 4 × 10 米往返跑测试进行测量。采用成分数据分析来研究 24 小时运动行为与 PF 之间的关联,并采用成分等时替代分析来进行时间再分配。结果经年龄、性别和体重指数(BMI)调整后,每日组成与CRF(p < 0.001,r2 = 0.20)、柔韧性(p < 0.001,r2 = 0.07)、肌肉力量(p < 0.001,r2 = 0.37)、肌肉耐力(p < 0.001,r2 = 0.26)和速度-敏捷性(p < 0.001,r2 = 0.26)显著相关。增加中度到剧烈的体育锻炼(MVPA)而牺牲体育锻炼和睡眠,以及增加中度到剧烈的体育锻炼(MVPA)而牺牲睡眠,分别与肌肉力量和速度-敏捷性的显著提高有关。结论:这些研究结果为在建议范围内替换运动行为以促进幼儿期心肺功能发育提供了有益的启示。
{"title":"24-H movement behaviors and physical fitness in preschoolers: A compositional and isotemporal reallocation analysis","authors":"Huiqi Song ,&nbsp;Patrick W.C. Lau ,&nbsp;Jingjing Wang ,&nbsp;Yunfei Liu ,&nbsp;Yi Song ,&nbsp;Lei Shi","doi":"10.1016/j.jesf.2024.03.002","DOIUrl":"https://doi.org/10.1016/j.jesf.2024.03.002","url":null,"abstract":"<div><h3>Background/Objectives</h3><p>This study examined the relationships between 24-h movement behaviors and physical fitness (PF) in preschool children.</p></div><div><h3>Methods</h3><p>The study was conducted on 474 children aged 3–6 years in Zhuhai. Physical activity (PA) and sedentary behavior (SB) were collected by the accelerometer, and sleep time was assessed through the parent-report questionnaire. Balance, cardiorespiratory fitness (CRF), flexibility, muscle strength, muscular endurance, and speed-agility were measured using a balance beam test, 20 m shuttle run test, sit and reach test, handgrip test, sit-ups, and 4 × 10 m shuttle run test respectively. The compositional data analysis was used to examine the association between 24-h movement behaviors and PF, and the compositional isotemporal substitution analysis was used for the time reallocation.</p></div><div><h3>Results</h3><p>The daily composition, adjusted for age, gender, and body mass index (BMI), was significantly associated with CRF (p &lt; 0.001, r<sup>2</sup> = 0.20), flexibility (p &lt; 0.001, r<sup>2</sup> = 0.07), muscular strength (p &lt; 0.001, r<sup>2</sup> = 0.37), muscular endurance (p &lt; 0.001, r<sup>2</sup> = 0.26), and speed-agility (p &lt; 0.001, r<sup>2</sup> = 0.26). The addition of moderate-to-vigorous PA (MVPA) at the expense of SB and sleep, MVPA at the cost of sleep, was associated with significant muscular strength and speed-agility improvements respectively. The impact of SB and sleep replacing MVPA is stronger than MVPA replacing SB and sleep on muscular strength.</p></div><div><h3>Conclusion</h3><p>These findings offer useful insight for the replacement of movement behaviors within the recommended range to facilitate PF development in early childhood.</p></div>","PeriodicalId":15793,"journal":{"name":"Journal of Exercise Science & Fitness","volume":"22 3","pages":"Pages 187-193"},"PeriodicalIF":2.8,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1728869X24000182/pdfft?md5=f4c9556613e657f64e236798bd1acdff&pid=1-s2.0-S1728869X24000182-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140163870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study protocol for a comparative randomized controlled trial of Tai Chi and conventional exercise training on alleviating depression in older insomniacs 太极拳与传统运动训练对缓解老年失眠者抑郁情绪的随机对照比较试验研究方案
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-14 DOI: 10.1016/j.jesf.2024.03.001
Francesco Recchia , Angus P. Yu , Teryn C. Ng , Daniel Y. Fong , Derwin K.C. Chan , Calvin P. Cheng , Stanley S.C. Hui , Chenchen Wang , Parco M. Siu

Background

Insomnia and depression are prevalent mental disorders that are often comorbid among older adults. Lifestyle intervention strategies incorporating Tai Chi or conventional exercise have been shown to alleviate symptoms of insomnia and depression. However, the comparative efficacy of these exercise modalities in individuals with both disorders has yet to be determined. Therefore, the aim of this study is to examine the efficacy of Tai Chi and conventional exercise for reducing depressive symptoms in older adults with chronic insomnia and depressive symptoms, when compared to a health education control.

Methods

This study is a prospective, assessor-blinded, three-arm, parallel group, randomized controlled trial. Older adults aged ≥60 years with a diagnosis of chronic insomnia and depressive symptoms will be randomly assigned to a Tai Chi, conventional exercise or health education control condition on a 1:1:1 basis. Interventions will last for 3 months, with a 6-month follow-up period. The primary outcome is depressive symptoms, assessed using the Hospital Anxiety and Depression Scale. Secondary outcomes include subjective sleep quality, 7-day actigraphy, 7-day sleep diary, anxiety symptoms, quality of life, medication usage and physical function. All measurements will be conducted at baseline, 3 months and 9 months by outcome assessors who are blinded to group allocation.

Discussion

This study will compare the efficacy of Tai Chi and conventional exercise in improving depression outcomes in older adults with chronic insomnia and depressive symptoms. Our results will shed light on the clinical potential of these interventions for combating insomnia and depression in older adults.

失眠和抑郁是普遍存在于老年人中的精神疾病,这两种疾病经常并发。结合太极拳或传统运动的生活方式干预策略已被证明可减轻失眠和抑郁症状。然而,这些运动方式对患有这两种疾病的人的疗效比较尚待确定。因此,本研究旨在考察太极拳和传统运动与健康教育对照组相比,对患有慢性失眠和抑郁症状的老年人减轻抑郁症状的疗效。本研究是一项前瞻性、评估者盲法、三臂平行组随机对照试验。年龄≥60 岁、确诊患有慢性失眠和抑郁症状的老年人将按 1:1:1 的比例被随机分配到太极、传统运动或健康教育对照组。干预将持续 3 个月,随访 6 个月。主要结果是抑郁症状,采用医院焦虑抑郁量表进行评估。次要结果包括主观睡眠质量、7 天动图法、7 天睡眠日记、焦虑症状、生活质量、药物使用和身体功能。所有测量将在基线、3 个月和 9 个月时进行,由对组别分配保密的结果评估员进行。这项研究将比较太极拳和传统运动在改善患有慢性失眠和抑郁症状的老年人的抑郁疗效。我们的研究结果将阐明这些干预措施在防治老年人抑郁和失眠方面的临床潜力。
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引用次数: 0
Region of Murcia’s 2022 report card on physical activity for children and youth 穆尔西亚大区 2022 年儿童和青少年体育活动成绩单
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-02 DOI: 10.1016/j.jesf.2024.02.002
José Francisco López-Gil , Pilar Sainz de Baranda , Noelia González-Gálvez , Eduardo Segarra-Vicens , Alfonso Valero-Valenzuela , Antonio Avellaneda , María Alegría Avilés-Martínez , Sergio López Barrancos , Miguel Díaz Delgado , Desirée Victoria-Montesinos , Fernando Ureña Villanueva , Pedro Emilio Alcaraz

Objective

The aim of this review was to summarize the process and results of the Region of Murcia's 2022 Report Card on Physical Activity for Children and Youth.

Methods

Indicators from the Global Matrix initiative (Overall Physical Activity, Organized Sport & Physical Activity, Physical Fitness, Active Play, Active Transport, Sedentary Behaviors, Family & Peers, School, Community & Environment, and Government) were evaluated based on the best available data in the Region of Murcia.

Results

Active play was the indicator with the highest grade (B+), followed by Organized Sport & Physical Activity (B) and Active Play (B). School and Family and Peers indicators obtained a C+ and C grade, respectively. Both Community and Environment and Sedentary Behaviors indicators received a D+ grade. The grade for Overall Physical Activity and Government indicators was D. Physical Fitness was the indicator with the lowest grade of this Report Card (D−). None of the indicators received an incomplete grade (INC) because of a lack of available information.

Conclusions

The present Report Card offers evidence highlighting the low level of physical activity in Spanish children and adolescents living in the Region of Murcia. Further studies and surveillance efforts are urgently needed for most of the indicators analyzed, which should be addressed by researchers and the Region of Murcia's Government for this specific population. A strong commitment from the Government of the Region of Murcia is needed at all levels to promote a cultural change that will lead children and young people in this region to improve the current situation.

本报告旨在总结穆尔西亚大区 2022 年儿童和青少年体育活动成绩单的过程和结果。根据穆尔西亚大区现有的最佳数据,对 "全球矩阵 "倡议中的指标(全面体育活动、有组织的体育运动和体育活动、体能、积极游戏、积极交通、久坐行为、家庭和同伴、学校、社区和环境以及政府)进行了评估。积极游戏是得分最高的指标(B+),其次是有组织体育运动(B)和积极游戏(B)。学校和家庭及同伴指标分别获得 C+和 C 级。社区与环境和久坐行为指标均为 D+。体适能是本成绩单中得分最低的指标(D-)。由于缺乏可用信息,没有一项指标获得不完整等级(INC)。本报告单提供的证据突出表明,生活在穆尔西亚大区的西班牙儿童和青少年的体能 活动水平较低。研究人员和穆尔西亚大区政府应针对这一特殊人群,对大部分分析指标进行进一步的研究和监测。穆尔西亚大区政府需要在各个层面做出强有力的承诺,以促进文化变革,引导穆尔西亚大 区的儿童和青少年改善目前的状况。
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引用次数: 0
The influence of low resistance respiratory muscle training on pulmonary function and high intensity exercise performance 低阻力呼吸肌训练对肺功能和高强度运动表现的影响
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-03-01 DOI: 10.1016/j.jesf.2024.02.007
Hajed M. Al-Otaibi , Francesco Sartor , Hans-Peter Kubis

Background/objectives

Respiratory muscle training (RMT) was recognized as an effective means to improve respiratory muscle (RM) strength and enhance exercise performance. The purpose of this study was to examine the effect of low-intensity RMT on RM strength, pulmonary function, and performance.

Methods

Fourteen healthy active adults were assigned randomly to either a training or placebo group. The training group completed six weeks of RMT, which consisted of a first week, 1 set of 15 min/d, 5 d/wk at 10–25% of maximal inspiratory pressure (PImax), and the remaining 5 weeks, 2 sets of 15 min/d, 5 d/wk, at 30% PImax. The placebo group followed the same protocol but with almost no additional ventilatory resistance. Measurement of RM strength and endurance, spirometry, and endurance exercise performance were obtained before and after the RMT program.

Results

In the training group, PImax (+14%) and maximal expiratory pressure (PEmax, +27%), forced vital capacity (FVC, +3.6%), maximal oxygen uptake (VO2max, +11%), and time to exhaustion (Tlim90%, +25%) increased significantly from baseline values (P < 0.05). No significant changes were observed in the placebo group. Also, no significant interaction in maximum voluntary ventilation (MVV12), minute ventilation (VE), and respiratory rate (RR) were detected.

Conclusions

These data suggest that low-intensity RMT is an effective tool to improve RM strength, pulmonary elastic properties and endurance exercise performance.

背景/目的呼吸肌训练(RMT)被认为是提高呼吸肌(RM)力量和运动表现的有效方法。本研究旨在探讨低强度呼吸肌训练对呼吸肌力量、肺功能和运动表现的影响。方法将 14 名健康的成年人随机分配到训练组或安慰剂组。训练组完成为期六周的 RMT 训练,其中第一周为最大吸气压力(PImax)的 10-25%,每天 1 组,每组 15 分钟,每周 5 天;其余 5 周为最大吸气压力(PImax)的 30%,每天 2 组,每组 15 分钟,每周 5 天。安慰剂组采用相同的方案,但几乎没有额外的通气阻力。结果在训练组中,PImax(+14%)和最大呼气压力(PEmax,+27%)、用力肺活量(FVC,+3.6%)、最大摄氧量(VO2max,+11%)和力竭时间(Tlim90%,+25%)与基线值相比有显著增加(P <0.05)。安慰剂组未观察到明显变化。此外,在最大自主通气量(MVV12)、分钟通气量(VE)和呼吸频率(RR)方面也未发现明显的交互作用。
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引用次数: 0
Tai Chi counteracts age-related somatosensation and postural control declines among older adults 太极拳可抵消老年人与年龄相关的躯体感觉和姿势控制能力的下降
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-02-24 DOI: 10.1016/j.jesf.2024.02.004
Teng Zhang , Li Li , Jan M. Hondzinski , Min Mao , Wei Sun , Qipeng Song

Objective

To investigate the effect of a 16-week Tai Chi practice on strength, tactile sensation, kinesthesia, and static postural control among older adults of different age groups.

Methods

This is a quasi-experimental study. Thirteen participants aged 60–69 years (60–69yr), 11 aged 70–79 years (70–79yr), and 13 aged 80–89 years (80–89yr) completed 16 weeks of 24-form Tai Chi practice. Their ankle and hip peak torque, tactile sensation, ankle and knee kinesthesia, and the root mean square of the center of pressure (Cop-RMS) were measured before (week 0) and after (week 17) practice.

Results

80–89yr showed less ankle plantar/dorsiflexion and hip abduction peak torques (p = 0.003, p < 0.001, p = 0.001), and a greater ankle plantar/dorsiflexion kinesthesia (p < 0.001, p = 0.002) than 60–69yr and 70–79yr. Greater ankle plantar/dorsiflexion and hip abduction torques (p = 0.011, p < 0.001, p = 0.045), improved arch and heel tactile sensation (p = 0.040, p = 0.009), and lower knee flexion/extension kinesthesia (p < 0.001, p = 0.044) were observed at week 17. The significant group*practice interaction for the fifth metatarsal head tactile sensation (p = 0.027), ankle plantar/dorsiflexion kinesthesia (p < 0.001, p = 0.004), and the CoP-RMS in the mediolateral direction (p = 0.047) only in 80–89yr revealed greater improvement at week 17.

Conclusion

Tai Chi practice increased strength, tactile sensation, kinesthesia, and static postural control among older adults. Tai Chi practice improved tactile, kinesthesia sensations, and static postural control among older adults over 80, who presented with worse strength and kinesthesia than their younger counterparts. Tai Chi practice offers a safe exercise option for those aged over 80 to encourage improvements in sensorimotor control.

目的 研究为期 16 周的太极拳练习对不同年龄组老年人的力量、触觉、动觉和静态姿势控制的影响。 方法 这是一项准实验研究。13 名 60-69 岁(60-69yr)、11 名 70-79 岁(70-79yr)和 13 名 80-89 岁(80-89yr)的参与者完成了为期 16 周的 24 式太极拳练习。在练习前(第 0 周)和练习后(第 17 周)测量了他们的踝关节和髋关节峰值扭矩、触觉、踝关节和膝关节运动感觉以及压力中心均方根(Cop-RMS)。结果与 60-69 岁和 70-79 岁的人相比,80-89 岁的人踝关节跖屈/背伸和髋关节外展峰值扭矩较小(p = 0.003,p < 0.001,p = 0.001),踝关节跖屈/背伸运动感觉较强(p < 0.001,p = 0.002)。第 17 周时,观察到踝关节跖屈/背伸和髋关节外展力矩增大(p = 0.011,p <0.001,p = 0.045),足弓和足跟触觉改善(p = 0.040,p = 0.009),膝关节屈伸动觉降低(p <0.001,p = 0.044)。第五跖骨头触觉(p = 0.027)、踝关节跖屈/背伸运动觉(p < 0.001, p = 0.004)和内外侧方向的 CoP-RMS (p = 0.047)在第 17 周时,只有 80-89 岁的老年人有明显的组别*练习交互作用。太极拳练习改善了 80 岁以上老年人的触觉、运动感觉和静态姿势控制,而他们的力量和运动感觉比年轻人差。太极拳练习为80岁以上的老年人提供了一种安全的运动选择,可促进感官运动控制能力的改善。
{"title":"Tai Chi counteracts age-related somatosensation and postural control declines among older adults","authors":"Teng Zhang ,&nbsp;Li Li ,&nbsp;Jan M. Hondzinski ,&nbsp;Min Mao ,&nbsp;Wei Sun ,&nbsp;Qipeng Song","doi":"10.1016/j.jesf.2024.02.004","DOIUrl":"https://doi.org/10.1016/j.jesf.2024.02.004","url":null,"abstract":"<div><h3>Objective</h3><p>To investigate the effect of a 16-week Tai Chi practice on strength, tactile sensation, kinesthesia, and static postural control among older adults of different age groups.</p></div><div><h3>Methods</h3><p>This is a quasi-experimental study. Thirteen participants aged 60–69 years (60–69yr), 11 aged 70–79 years (70–79yr), and 13 aged 80–89 years (80–89yr) completed 16 weeks of 24-form Tai Chi practice. Their ankle and hip peak torque, tactile sensation, ankle and knee kinesthesia, and the root mean square of the center of pressure (Cop-RMS) were measured before (week 0) and after (week 17) practice.</p></div><div><h3>Results</h3><p>80–89yr showed less ankle plantar/dorsiflexion and hip abduction peak torques (p = 0.003, p &lt; 0.001, p = 0.001), and a greater ankle plantar/dorsiflexion kinesthesia (p &lt; 0.001, p = 0.002) than 60–69yr and 70–79yr. Greater ankle plantar/dorsiflexion and hip abduction torques (p = 0.011, p &lt; 0.001, p = 0.045), improved arch and heel tactile sensation (p = 0.040, p = 0.009), and lower knee flexion/extension kinesthesia (p &lt; 0.001, p = 0.044) were observed at week 17. The significant group*practice interaction for the fifth metatarsal head tactile sensation (p = 0.027), ankle plantar/dorsiflexion kinesthesia (p &lt; 0.001, p = 0.004), and the CoP-RMS in the mediolateral direction (p = 0.047) only in 80–89yr revealed greater improvement at week 17.</p></div><div><h3>Conclusion</h3><p>Tai Chi practice increased strength, tactile sensation, kinesthesia, and static postural control among older adults. Tai Chi practice improved tactile, kinesthesia sensations, and static postural control among older adults over 80, who presented with worse strength and kinesthesia than their younger counterparts. Tai Chi practice offers a safe exercise option for those aged over 80 to encourage improvements in sensorimotor control.</p></div>","PeriodicalId":15793,"journal":{"name":"Journal of Exercise Science & Fitness","volume":"22 2","pages":"Pages 152-158"},"PeriodicalIF":2.8,"publicationDate":"2024-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1728869X24000133/pdfft?md5=3fd4578160ab5014cd3a5ec3f687d45a&pid=1-s2.0-S1728869X24000133-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139992809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The enhancement of explosive power contributes to the development of anaerobic capacity: A comparison of autoregulatory progressive resistance exercise and velocity-based resistance training 爆发力的增强有助于无氧能力的发展:自律性渐进阻力运动与速度型阻力训练的比较
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-02-20 DOI: 10.1016/j.jesf.2024.02.005
Zijing Huang , Jiayong Chen , Lunxin Chen , Mingyang Zhang , Wenfeng Zhang , Jian Sun , Duanying Li

Objectives

Due to the character of the taekwondo, the adenosine triphosphate–phosphocreatine system provides the energy for each kick, the glycolytic system supports the repeated execution of kicks, and the aerobic system promotes recovery between these movements and the bout. Therefore, taekwondo athletes require high explosive power and anaerobic capacity in order to carry out sustained and powerful attacks. So, the purpose of this study is to compare the effects of APRE and VBRT on lower-limb explosive power and anaerobic capacity in college taekwondo players.

Methods

A total of 30 taekwondo players completed an 8-week training intervention with autoregulatory progressive resistance exercise (APRE; n = 15) and velocity-based resistance training (VBRT; n = 15). Testing included the one-repetition maximum squat, countermovement jump (CMJ), taekwondo anaerobic intermittent kick test (TAIKT), and 30-s Wingate anaerobic test (WAnT).

Results

(1) Intragroup comparisons revealed significant effects for one-repetition maximum squat, peak power of CMJ (CMJPP), relative peak power of CMJ (CMJRPP), and total number of TAIKT (TAIKTTN) in both the APRE and VBRT groups. The VBRT group exhibited small effect sizes for time at peak power of WAnT (WAnTPPT) and moderate effect sizes for peak power of WAnT (WAnTPP), relative peak power of WAnT (WAnTRPP), and fatigue index of TAIKT (TAIKTFI), whereas the APRE group exhibited small effect sizes for TAIKTFI. (2) Intergroup comparisons revealed no significant effects in any of the results. However, VBRT demonstrated a moderate advantage in WAnTPP and WAnTRPP, whereas APRE had a small advantage in CMJPP and CMJRPP.

Conclusions

These findings suggest that APRE improved explosive power (CMJPP and CMJRPP) more, whereas VBRT improved anaerobic power output (WAnTPP and WAnTRPP) more. Both methods were found to have similar effects in improving the anaerobic endurance (WAnTPPT and TAIKTTN) and fatigue index (power drop of WAnT and TAIKTFI).

目标由于跆拳道的特点,三磷酸腺苷-磷酸肌酸系统为每次踢腿提供能量,糖酵解系统支持反复踢腿,有氧系统促进这些动作和比赛之间的恢复。因此,跆拳道运动员需要高爆发力和无氧能力,才能进行持续有力的攻击。方法共有 30 名跆拳道运动员完成了为期 8 周的训练干预,其中包括自动调节渐进阻力运动(APRE;15 人)和速度型阻力训练(VBRT;15 人)。结果(1) 组内比较显示,APRE 组和 VBRT 组的单次最大深蹲、CMJ 峰值功率(CMJPP)、CMJ 相对峰值功率(CMJRPP)和 TAIKT 总次数(TAIKTTN)均有显著影响。VBRT 组在 WAnT 峰值功率时间(WAnTPPT)方面表现出较小的效应大小,在 WAnT 峰值功率(WAnTPP)、WAnT 相对峰值功率(WAnTRPP)和 TAIKT 疲劳指数(TAIKTFI)方面表现出中等效应大小,而 APRE 组在 TAIKTFI 方面表现出较小的效应大小。(2) 组间比较显示,所有结果均无显著影响。然而,VBRT 在 WAnTPP 和 WAnTRPP 方面表现出中等程度的优势,而 APRE 在 CMJPP 和 CMJRPP 方面则表现出较小的优势。结论这些研究结果表明,APRE 对爆发力(CMJPP 和 CMJRPP)的改善更大,而 VBRT 对无氧力量输出(WAnTPP 和 WAnTRPP)的改善更大。两种方法在提高无氧耐力(WAnTPPT 和 TAIKTTN)和疲劳指数(WAnT 功率下降和 TAIKTFI)方面的效果相似。
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引用次数: 0
Short-term resistance training combined with cheese supplementation can optimize body parameters and intestinal microbiota in healthy adults 短期阻力训练结合奶酪补充剂可优化健康成年人的身体参数和肠道微生物群
IF 2.8 2区 医学 Q2 SPORT SCIENCES Pub Date : 2024-02-20 DOI: 10.1016/j.jesf.2024.02.006
Yi-Hsuan Lin , Xue-Han Li , Hao-Tian Zhao , Jian-Hao Chen , Jia-Qi Li , Yi Yan

Background

Resistance training (RT) and protein supplementation have beneficial effects on the human body. However, it is unknown if RT's health-promoting benefits are enhanced by food-borne protein, such as cheese supplements. This study investigated at how the body composition, lipid profile, muscle strength and intestinal microbiota changed following four weeks of RT combined with cheese supplementation.

Methods

Thirty-five male and untrained adults were divided into 4 groups [control group (CON), low-dose group (LG), medium-dose group (MG), and high-dose group (HG)] and underwent a 4-week RT (3 times/week) in combination with cheese supplementation. Participants received 108 g (LG), 216 g (MG), or 324 g (HG) of cheese on the day of RT, and each serving (108 g) of cheese contained 6.7 g of food-borne protein. The RT program was a whole-body program with movements such as chest presses, leg presses, seated rowing, knee extensions and triceps pushdown. The exercise consisted of 3 sets of 8–12 repetitions at 70%RM, with a 120-s break in between. Body parameters (body composition, lipid profile and muscle strength) were assessed at baseline and after the 4 weeks of the intervention. The feces sample was taken every weekend. A two-way (group × time) mixed-design ANOVA was used to examine the body parameters. Independent one-way ANOVA was used to analyze the differences between groups in baseline characteristics and different values of each parameter.

Results

HDL-C level was higher in MG than in LG. In comparison to LG, MG had lower levels of total cholesterol, low-density lipoprotein cholesterol, body weight, body mass index, body fat mass and body fat percentage. However, there was no difference in muscle strength between in the four groups. The abundance of Actinobacteria was higher in LG and Erysipelotrichaceae was lower in MG and HG.

Conclusion

The findings suggest that cheese could be a readily available food-borne protein supplement to enhance the beneficial effects of RT on health. It may improve body composition and lipid profile by altering the proportion of intestinal microbiota. During the 4-week RT intervention, 13.4 g of foodborne protein in the form of cheese 3 times per week was the ideal dosage.

背景阻力训练(RT)和蛋白质补充对人体有益。然而,人们还不知道食物中的蛋白质(如奶酪补充剂)是否能增强阻力训练对健康的促进作用。本研究调查了人体成分、血脂、肌肉力量和肠道微生物群在进行为期四周的 RT 并补充奶酪后会发生怎样的变化。参与者在 RT 当天分别摄入 108 克(LG)、216 克(MG)或 324 克(HG)奶酪,每份(108 克)奶酪含有 6.7 克食源性蛋白质。RT 计划是一项全身运动计划,包括胸部推举、腿部推举、坐姿划船、膝关节伸展和肱三头肌下压等动作。运动包括 3 组,每组 8-12 次,每次重量为 70%,中间休息 120 秒。身体参数(身体成分、血脂和肌肉力量)分别在基线和 4 周干预后进行评估。每周末采集粪便样本。采用双向(组别 × 时间)混合设计方差分析来检查身体参数。结果 MG 的 HDL-C 水平高于 LG。与 LG 相比,MG 的总胆固醇、低密度脂蛋白胆固醇、体重、体重指数、体脂量和体脂率水平较低。然而,四组之间的肌肉力量没有差异。结论:研究结果表明,奶酪可以作为一种随时可用的食源性蛋白质补充剂,增强 RT 对健康的有益影响。它可以通过改变肠道微生物群的比例来改善身体组成和血脂状况。在为期 4 周的 RT 干预期间,每周 3 次以奶酪形式摄入 13.4 克食源性蛋白质是最理想的剂量。
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引用次数: 0
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Journal of Exercise Science & Fitness
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