Science & Sports最新文献_第9页

Impact de la nouvelle réglementation du CACI sur les comportements de souscription des licences : étude au sein d’une fédération multisport 新的 CACI 法规对许可行为的影响：对一个多体育运动联合会的研究

IF 1.1 4区医学

Science & Sports Pub Date : 2024-05-01 DOI: 10.1016/j.scispo.2023.11.004

C. Terret , F. Pillard , F. Depiesse , L. (Louis) Gerville-Réache , L. (Léo) Gerville-Réache

{"title":"Impact de la nouvelle réglementation du CACI sur les comportements de souscription des licences : étude au sein d’une fédération multisport","authors":"C. Terret , F. Pillard , F. Depiesse , L. (Louis) Gerville-Réache , L. (Léo) Gerville-Réache","doi":"10.1016/j.scispo.2023.11.004","DOIUrl":"10.1016/j.scispo.2023.11.004","url":null,"abstract":"<div><h3>Objectifs</h3><p>L’étude menée a pour ambition d’évaluer les impacts des récentes modifications réglementaires concernant la délivrance du certificat médical d’absence de contre-indications à la pratique sportive (CACI) sur la souscription des licences sportives. Pour les disciplines sans contraintes particulières, la réglementation transfère désormais la responsabilité médicale vers les fédérations et les sportifs. En prenant en compte ces modifications réglementaires, deux hypothèses principales sont posées : la première suppose une baisse notable du nombre de CACI délivrés à la suite du transfert de responsabilité médicale vers les fédérations et les sportifs ; la seconde présume que les procédures allégées entraînent une souscription plus précoce des licences.</p></div><div><h3>Méthodologie</h3><p>L’analyse s’est appuyée sur les données récoltées au sein de la Fédération française du sport universitaire (FFSU) pour les deux saisons avant COVID-19 et la saison 2022–2023. Pour chaque saison, le nombre de licences souscrites, le nombre de CACI délivrés et la dynamique de souscription ont été analysés.</p></div><div><h3>Résultats</h3><p>Les résultats confirment la première hypothèse, démontrant au sein de la FFSU une diminution de 94 % des CACI fournis pour les disciplines sans contraintes lors de la saison 2022–2023 par rapport aux saisons précédentes. Concernant la deuxième hypothèse, une tendance vers une souscription plus précoce des licences a été mise en évidence en raison de la suppression d’obligation du CACI pour les disciplines sans contraintes et son remplacement par un questionnaire de santé.</p></div><div><h3>Conclusion</h3><p>Les constats de cette étude indiquent que les changements réglementaires ont influencé les comportements de souscription des licences, facilitant l’adhésion rapide des sportifs tout en réduisant considérablement les CACI délivrés.</p></div><div><h3>Purpose</h3><p>The aims of this study are to assess the impacts of recent regulatory changes regarding the issuance of the Medical Certificate of No Contraindication (CACI) for sports practice on the registration for sports licenses. For disciplines with no particular constraints, the regulation now shifts medical responsibility towards sports federations and athletes. In light of these regulatory changes, two main hypotheses are posited: the first assumes a significant decrease in the number of CACI issued following the transfer of medical responsibility to federations and athletes; the second presumes that the streamlined procedures lead to an earlier registration for licenses.</p></div><div><h3>Methodology</h3><p>The analysis relied on data collected within the French Federation of University Sports (FFSU) for the two seasons prior to the COVID-19 outbreak and the 2022–2023 season. For each season, the number of registered licenses, the number of CACI issued, and the dynamics of adherence were analyzed.</p></div><div><h3>Results</h3><p>The results affirm ","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 3","pages":"Pages 250-259"},"PeriodicalIF":1.1,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140768975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lactate and pyruvate concentration change as a potential mechanism of V˙O2 slow component 乳酸和丙酮酸浓度变化作为 V˙O2的潜在机制</mml:msu

IF 1.1 4区医学

Science & Sports Pub Date : 2024-05-01 DOI: 10.1016/j.scispo.2023.04.006

N. Bessot

{"title":"Lactate and pyruvate concentration change as a potential mechanism of V˙O2 slow component","authors":"N. Bessot","doi":"10.1016/j.scispo.2023.04.006","DOIUrl":"10.1016/j.scispo.2023.04.006","url":null,"abstract":"<div><p>At work rate corresponds to heavy or severe exercise, a slowly developing component of the <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> response, named <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> slow component appear. A clear picture of the mechanism underlying the slow-component rise in <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> remains to be described. We argue in this article that the <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span><span> slow component could be explained by a progressive lactate and pyruvate availability for mitochondria observed only when oxidative capacity of muscle is challenged (above lactate threshold). In this kind of exercise, the work rate requires the use of a large number of mitochondria that could only be involved when the pyruvate/lactate concentration in the cells is increased. This mechanism would then operate according to the law of mass action. The resynthesize of ATP should become progressively more aerobic than anaerobic. The hypothesis of a pyruvate/lactate concentration mechanism of </span><span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> slow component needs further experimental validation.</p></div><div><p><span>À une cadence de travail correspondant à un exercice intense ou sévère, une augmentation lente de la réponse </span><span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> appelée composante lente de <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> apparaît progressivement. Une image claire du mécanisme qui sous-tend l’augmentation de la composante lente de <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> reste à décrire. Nous soutenons dans cet article que la composante lente de <span><math><mrow><mover><mi>V</mi><mo>˙</mo></mover><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span><span> pourrait être expliquée par une disponibilité progressive du lactate et du pyruvate pour les mitochondries observées uniquement lorsque la capacité oxydative du muscle est chalengée (au-dessus du seuil de lactate). Dans ce type d’exercice, la cadence de travail nécessite l’utilisation d’un grand nombre de mitochondries qui ne pourraient être impliquées que lorsque la concentration en pyruvate et lactate dans les cellules est augmentée. Ce mécanisme fonctionnerait alors selon la loi de l’action de masse. La resynthèse d’ATP devrait devenir progressivement plus aérobie qu’anaérobie. Cependant cette hypothèse d’un mécanisme de concentration en pyruvate et lactate à l’origine composante lente de </span><span><math><mrow><mover><mi>V</","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 3","pages":"Pages 311-315"},"PeriodicalIF":1.1,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139537749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic predisposition to obesity among adolescents: The moderator role of agility and speed 青少年肥胖的遗传倾向：敏捷性和速度的调节作用

IF 1.1 4区医学

Science & Sports Pub Date : 2024-05-01 DOI: 10.1016/j.scispo.2023.08.002

C. Brand , A.P. Sehn , V.B. Lemes , P.F. Todendi , A.R.M. Valim , C.P. Reuter

{"title":"Genetic predisposition to obesity among adolescents: The moderator role of agility and speed","authors":"C. Brand , A.P. Sehn , V.B. Lemes , P.F. Todendi , A.R.M. Valim , C.P. Reuter","doi":"10.1016/j.scispo.2023.08.002","DOIUrl":"10.1016/j.scispo.2023.08.002","url":null,"abstract":"<div><h3>Purpose</h3><p>To verify if there is a moderator role of agility and speed in the relationship between genetic risk score (GRS) and waist circumference (WC) in adolescents.</p></div><div><h3>Method</h3><p>This is a cross-sectional study developed with 782 adolescents aged between 12 and 17 years from schools in a city in southern Brazil. To determine WC, an inelastic tape was used. Agility and speed were evaluated following the procedures of <em>Projeto Esporte Brasil</em>. The GRS was based on previously associated obesity single-nucleotide polymorphism rs9939609 (FTO), rs6548238 (TMEM18), and rs16835198 (FNDC5). Moderation analysis was applied through linear regression models.</p></div><div><h3>Results</h3><p>Significative interactions were observed for agility (β=−2592; CI=−4426; −0.757; <em>P</em>      =0.008)×3–4 risk alleles with WC. Additionally, it is observed that in the lowest tercile of agility and speed (better results in the testes), a lower WC is verified, including in the category≥5 risk alleles.</p></div><div><h3>Conclusion</h3><p>Agility and speed acted as moderators in the relationship between genetic risk score and WC in adolescents. These findings highlight the relevance of developing interventions targeting to improve higher levels of these physical fitness components.</p></div><div><h3>Objectif</h3><p>Vérifier s’il existe un rôle de modérateur de l’agilité et de la vitesse dans la relation entre le score de risque génétique (GRS) et le tour de taille chez les adolescents.</p></div><div><h3>Méthode</h3><p><span>Il s’agit d’une étude transversale menée auprès de 782 adolescents âgés de 12 à 17 ans issus d’écoles d’une ville du sud du Brésil. Pour déterminer le tour de taille, un ruban inextensible a été utilisé. L’agilité et la vitesse ont été évaluées selon les procédures du </span><em>Projeto Esporte Brasil</em>. Le GRS était basé sur les polymorphismes nucléotidiques simples associés précédemment à l’obésité rs9939609 (FTO), rs6548238 (TMEM18) et rs16835198 (FNDC5). Des analyses de modération ont été réalisées à l’aide de modèles de régression linéaire.</p></div><div><h3>Résultats</h3><p>Des interactions significatives ont été observées pour l’agilité (β=−2592 ; IC=−4426 ; −0,757 ; <em>p</em>      =0,008)×3–4 allèles de risque avec le tour de taille. De plus, il est observé que dans le plus bas tercile d’agilité et de vitesse (meilleurs résultats aux tests), un tour de taille plus faible est constaté, y compris dans la catégorie≥5 allèles de risque.</p></div><div><h3>Conclusion</h3><p","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 3","pages":"Pages 267-273"},"PeriodicalIF":1.1,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139638068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bone mineral density in young sprinters and young active men 年轻短跑运动员和年轻运动员的骨质密度

IF 1.1 4区医学

Science & Sports Pub Date : 2024-05-01 DOI: 10.1016/j.scispo.2023.11.002

W. El Hawly , G. Zunquin , A. Pinti , Z. El Hage , Y. Bassim , R. El Hage

{"title":"Bone mineral density in young sprinters and young active men","authors":"W. El Hawly , G. Zunquin , A. Pinti , Z. El Hage , Y. Bassim , R. El Hage","doi":"10.1016/j.scispo.2023.11.002","DOIUrl":"10.1016/j.scispo.2023.11.002","url":null,"abstract":"<div><h3>Introduction</h3><p>The main aim of this study was to compare bone health parameters in young active sprinters and young active men.</p></div><div><h3>Summary of facts and results</h3><p>Twenty-six young sprinters and 26 young men participated in this study. Weight and height were measured, and body mass index (BMI) was calculated. Body composition, whole body (WB) BMC, lumbar spine (L1–L4) BMD, total hip (TH) BMD and forearm BMD were evaluated by DXA. Physical performance variables, daily calcium intake, daily protein intake and physical activity level were assessed. Age, height, lean mass, WB BMC and forearm BMD were not significantly different between the two groups. L1–L4 BMD, TH BMD, vertical jump and maximal strength of the lower limbs were higher in sprinters compared to active men.</p></div><div><h3>Conclusion</h3><p>The current study suggests that sprinters have higher lumbar spine and hip BMD values compared to active men. The current study has several implications in the field of prevention of osteoporosis in men.</p></div><div><h3>Introduction</h3><p>Le but de cette étude était de comparer des marqueurs de santé osseuse chez des jeunes hommes pratiquant le sprint et des jeunes hommes actifs.</p></div><div><h3>Synthèse des faits et résultats</h3><p>Vingt-six jeunes sprinteurs et 26 hommes actifs ont participé à cette étude. La composition corporelle, le contenu minéral osseux (CMO) du corps entier, la densité minérale osseuse (DMO) du rachis lombaire (L1–L4), la DMO de la hanche totale et la DMO de l’avant-bras ont été évaluées par DXA. Les paramètres de performance physique, la consommation calcique journalière, la consommation protéique journalière et le niveau d’activité physique ont été évaluées. L’âge, la taille, la masse maigre, le CMO du corps entier et la DMO de l’avant-bras n’étaient pas significativement différents entre les deux groupes. La DMO du rachis lombaire, la DMO de la hanche, la détente verticale et la force maximale des membres inférieurs étaient supérieures chez les jeunes sprinteurs par rapport aux hommes actifs.</p></div><div><h3>Conclusion</h3><p>La présente étude suggère que la DMO du rachis lombaire et la DMO de la hanche sont plus élevées chez les sprinteurs par rapport aux hommes actifs. Ces résultats ont des applications pratiques dans le domaine de la prévention de l’ostéoporose masculine.</p></div>","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 3","pages":"Pages 316-320"},"PeriodicalIF":1.1,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of internal and external loads during different small-sided games in young female soccer players 年轻女足运动员在不同小场比赛中的内外部负荷比较

IF 1.1 4区医学

Science & Sports Pub Date : 2024-05-01 DOI: 10.1016/j.scispo.2023.02.003

Y. Köklü, H. Türkdoğan, T. Bölükbaşı, U. Alemdaroğlu

{"title":"Comparison of internal and external loads during different small-sided games in young female soccer players","authors":"Y. Köklü, H. Türkdoğan, T. Bölükbaşı, U. Alemdaroğlu","doi":"10.1016/j.scispo.2023.02.003","DOIUrl":"10.1016/j.scispo.2023.02.003","url":null,"abstract":"<div><h3>Objectives</h3><p>This study aims to compare the acute internal and external loads during different small-sided games (SSG) of young female soccer players.</p></div><div><h3>Methods</h3><p>Sixteen female soccer players from a first-team squad of the Turkish third league (mean±SD: age: 16.1±2.3 years, height: 157.9±5.5cm, body weight: 55.2±8.2kg, training age: 4.0±2.3 years) participated in this study voluntarily. 2 vs. 2 (4 bouts of 2min separated by 2min of passive recovery), 3 vs. 3 (4 bouts of 3min separated by 2min of passive recovery), and 4 vs. 4 (4 bouts of 4min separated by 2min of passive recovery). SSGs were played in random order and at least 48hours apart. During SSGs, heart rate (HR) responses and distances covered in four different speed zones were recorded: Walking (WLK), low (LIR), moderate (MIR), and high-intensity (HIR) running. Moreover, the rating of perceived exertion (RPE) and blood lactate (La<sup>−</sup>) responses were determined at the end of each SSG.</p></div><div><h3>Results</h3><p>The results showed that %HRmax responses were significantly lower and La<sup>−</sup> and RPE responses were significantly higher in 2 vs. 2 SSG compared to other SSG (<em>P</em>  <0.05).</p></div><div><h3>Conclusion</h3><p>The present study showed that coaches and sports scientists could use 2 vs. 2 SSG to improve anaerobic endurance, while 3 vs. 3 and 4 vs. 4 SSGs can help to develop high-intensity aerobic endurance in young female soccer players.</p></div><div><h3>Objectif</h3><p>Cette étude vise à comparer les charges internes et externes aiguës lors de différents jeux réduits (SSG) chez des jeunes joueuses de football.</p></div><div><h3>Méthodes</h3><p>Seize joueuses de football de la troisième ligue turque (moyenne±ET : âge : 16,1±2,3ans, taille : 157,9±5,5cm, poids corporel : 55,2±8,2kg, âge d’entraînement : 4,0±2,3ans) ont participé volontairement à cette étude. 2 contre 2 (4 épisodes de 2min séparés par 2min de récupération passive), 3 contre 3 (4 épisodes de 3min séparés par 2min de récupération passive) et 4 contre 4 (4 épisodes de 4min séparés par 2min de récupération passive). Les SSG ont été joués dans un ordre aléatoire avec au moins 48heures d’intervalle. Au cours des SSG, les réponses de la fréquence cardiaque (FC) et les distances parcourues dans quatre zones de v","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 3","pages":"Pages 260-266"},"PeriodicalIF":1.1,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139638932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The acute effect of proprioceptive neuromuscular facilitation recovery technique on fatigue in karate athletes 本体感觉神经肌肉促进恢复技术对空手道运动员疲劳的急性影响

IF 1.1 4区医学

Science & Sports Pub Date : 2024-03-01 DOI: 10.1016/j.scispo.2023.02.004

N.I. Arovah, D.A.T. Putri

{"title":"The acute effect of proprioceptive neuromuscular facilitation recovery technique on fatigue in karate athletes","authors":"N.I. Arovah, D.A.T. Putri","doi":"10.1016/j.scispo.2023.02.004","DOIUrl":"10.1016/j.scispo.2023.02.004","url":null,"abstract":"<div><h3>Objectives</h3><p>This study aimed to evaluate the effect of an active recovery technique based on proprioceptive neuromuscular facilitation (PNF) on parameters indicating fatigue among male and female karate athletes.</p></div><div><h3>Methods</h3><p>This research was a 2×<0.01). No main and interaction effect, however, was found for post-test HR. Improvements in RPE from pre-test to post-test were also found in all groups (<em>P</em>  =0.002) and in males (<em>P</em>  <0.01). Post-test QTR is significantly better in the AR (<em>P</em>  =0.368).</p></div><div><h3>Conclusion</h3><p>Both PNF-based recovery and passive recovery improve HR, RPE, and TQR. Although PNF-based recovery does not improve the post-test HR compared to PR, it improves RPE and TQR compared to PR. PNF-based recovery, thus, is recommended for improving fatigue recovery in karate athletes.</p></div><div><h3>Objectifs</h3><p>Cette étude visait à évaluer l’effet d’une technique de récupération active basée sur la facilitation neuromusculaire proprioceptive (FNP) sur les paramètres indiquant la fatigue chez les athlètes de karaté.</p></div><div><h3>Méthodes</h3><p>Cette recherche était une conception factorielle 2×minutes. Il a été suivi d’une récupération de 15minutes au cours de laquelle les groupes AR ont effectué un PNF d’intensité lumineuse de 2,5minutes et un post-tes","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 2","pages":"Pages 206-213"},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139632726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The role of monocarboxylate transporter-1 and -4 in exercise and training: A mini-review article 单羧酸盐转运体-1 和-4 在运动和训练中的作用：微型综述文章

IF 1.1 4区医学

Science & Sports Pub Date : 2024-03-01 DOI: 10.1016/j.scispo.2022.11.009

R. Seyedi , S.M. Tayebi , D. Zhang , Q. Yiming

{"title":"The role of monocarboxylate transporter-1 and -4 in exercise and training: A mini-review article","authors":"R. Seyedi , S.M. Tayebi , D. Zhang , Q. Yiming","doi":"10.1016/j.scispo.2022.11.009","DOIUrl":"10.1016/j.scispo.2022.11.009","url":null,"abstract":"<div><p>Accumulation of lactate in the muscles depends not only on the amount of lactate production in the muscle, but also on the amount of lactate diffusion inside and outside the muscle. Therefore, a facilitate system, a family of monocarboxylate transporters (MCTs), has been supplied to assist lactate across the cellular plasma membrane from the intracellular to the extracellular environment, and vice versa. Among the MCT isoforms, MCT1 and MCT4 are accepted as the key transporters in skeletal muscle. Exercise can increase the amount of both transporters in humans; however, this increase depends on many factors, including the type and intensity of exercise, the period of exercise, and the time of biopsy. Conclusion: this review suggests that the regulation of MCT1 protein in the muscle can occur in any exercise model; however, MCT4 protein is not easily affected by training. MCT1 and MCT4 protein expression may not always be concomitantly upregulated after exercise. The training model that regulates the amount of transporters are very important to design an appropriate training program to increase lactate excretion.</p></div><div><p>L’accumulation de lactate dans les muscles dépend non seulement de la production de lactate dans le muscle, mais aussi de la diffusion du lactate à l’intérieur et à l’extérieur du muscle. Par conséquent, un système de facilitation, une famille de transporteurs de monocarboxylate (MCT), a été fourni pour aider le lactate à traverser la membrane plasmique cellulaire de l’environnement intracellulaire à l’environnement extracellulaire, et vice versa. Parmi les isoformes MCT, MCT1 et MCT4 sont considérées comme les principaux transporteurs dans le muscle squelettique. L’exercice peut augmenter la quantité de ces deux transporteurs chez l’homme ; cependant, cette augmentation dépend de nombreux facteurs, y compris le type et l’intensité de l’exercice, la période d’exercice et le moment de la biopsie. Conclusion :cette étude suggère que la régulation de la protéine MCT1 dans le muscle peut se produire dans n’importe quel modèle d’exercice ; cependant, la protéine MCT4 n’est pas facilement affectée par l’entraînement. L’expression des protéines MCT1 et MCT4 n’est pas toujours régulée de manière concomitante après l’exercice. Le modèle d’entraînement qui régule la quantité de transporteurs est très important pour concevoir un programme d’entraînement approprié afin d’augmenter l’excrétion du lactate.</p></div>","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 2","pages":"Pages 144-152"},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114415357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparable effects of interval and traditional resistance exercise on lipolysis and insulin concentration in healthy young men 间歇运动和传统阻力运动对健康年轻男性脂肪分解和胰岛素浓度的影响具有可比性

IF 1.1 4区医学

Science & Sports Pub Date : 2024-03-01 DOI: 10.1016/j.scispo.2022.12.009

M. Bassami , M. Karimi , S. Ahmadizad

{"title":"Comparable effects of interval and traditional resistance exercise on lipolysis and insulin concentration in healthy young men","authors":"M. Bassami , M. Karimi , S. Ahmadizad","doi":"10.1016/j.scispo.2022.12.009","DOIUrl":"10.1016/j.scispo.2022.12.009","url":null,"abstract":"<div><h3>Objectives</h3><p>This study investigated the effects of two types of resistance exercise with active and inactive recovery on lipolysis and glycolysis in healthy young men.</p></div><div><h3>Equipment and methods</h3><p>Twelve healthy males (Mean±SD; age, 25.5±3.1 years; Body mass index, 24.2±2.0kg/m<sup>2</sup>) performed traditional resistance exercise (TRE) at 80% of 1RM (3 sets of 6 repetitions) with 2min passive recovery, and an interval resistance exercise (IRE) trial at 60% of 1RM (3 sets of 6 repetitions) followed by active recovery (1 set of 6 repetitions at 20% of 1RM). Three blood samples were taken before and immediately after exercise, and after one-hour recovery and were analyzed to measure glucose, insulin, non-esterified free fatty acid (NEFA), and glycerol concentration.</p></div><div><h3>Results</h3><p>Statistical analyses of the data revealed a main significant effect of resistance exercise and a significant (<em>P</em>  <0.05) during the recovery period, whereas, the concentration of NEFA increased significantly during the recovery period (<em>P</em>           <!-->min de récupération passive et un essai d’exercice de résistance par intervalles (IRE) à 60 % de 1RM (3 séries de 6 répétitions) suivi d’une récupération active (1 série de 6 répétitions à 20 % de 1RM). Trois échantillons de sang ont été prélevés avant et immédiatement après l’exercice et après une heure de récupération et ont été analysés pour mesurer la concentration de glucose, d’insuline, d’acides gras libres non estérifiés (AGNE) et de glycérol.</p></div><div><h3>Résultats</h3><p>Les analyses statistiques des donné","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 2","pages":"Pages 170-176"},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134935898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

10-week suspension and traditional push-up training: Comparison the effects on physical performance in young men 为期 10 周的悬挂训练和传统俯卧撑训练：比较对青年男子体能表现的影响

IF 1.1 4区医学

Science & Sports Pub Date : 2024-03-01 DOI: 10.1016/j.scispo.2023.05.001

G. Bayrak , U. Baş Aslan

{"title":"10-week suspension and traditional push-up training: Comparison the effects on physical performance in young men","authors":"G. Bayrak , U. Baş Aslan","doi":"10.1016/j.scispo.2023.05.001","DOIUrl":"10.1016/j.scispo.2023.05.001","url":null,"abstract":"<div><h3>Objectives</h3><p>Suspension training has become popular in sports and functional performance in recent years. Suspension training may promote higher improvement in physical performance compared to traditional training because of its greater instability. Therefore, this study aimed to compare the effects of 10-week suspension and traditional push-up training on physical performance in young men.</p></div><div><h3>Methods</h3><p>Thirty-two young men were divided randomly into two groups: suspension push-up (<em>n</em>  =15). Physical performance tests included 90<sup>0</sup> push-up test for strength-endurance, Closed Kinetic Chain Upper Extremity Stability test (CKCUES) for shoulder stability, Y Balance Test (YBT) for dynamic balance, and Seated Medicine Ball Throw Test (SMBT) for power. Assessments were completed in two sessions in both groups before and after the 10-week push-up training.</p></div><div><h3>Results</h3><p>In baseline values, a significant difference was found for only the CKCUES test in favor of the suspension push-up group (<em>P</em>  <0.05); however, when compared groups, there was a significant difference in the 90<sup>0</sup> push-up test in favor of the suspension push-up group (<em>P</em>    <!-->Trente-deux jeunes hommes ont été divisés au hasard en deux groupes : pompes en suspension (n = 17) et pompes traditionnelles (n = 15). Les tests de performance physique comprenaient le 90° push-up test pour la force-endurance, le CKCUES (Closed Kinetic Chain Upper Extremity Stability test) pour la stabilité des épaules, le Y Balance Test (YBT) pour l’équilibre dynamique et le SM","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 2","pages":"Pages 186-195"},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139299973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reactive Strength Index as a Key Performance Indicator in Different Athlete Populations – A Systematic Review 反应强度指数作为不同运动员群体的主要成绩指标 - 系统综述

IF 1.1 4区医学

Science & Sports Pub Date : 2024-03-01 DOI: 10.1016/j.scispo.2023.01.004

B. Southey , M. Willshire , M.J. Connick , D. Austin , D. Spits , E. Beckman

{"title":"Reactive Strength Index as a Key Performance Indicator in Different Athlete Populations – A Systematic Review","authors":"B. Southey , M. Willshire , M.J. Connick , D. Austin , D. Spits , E. Beckman","doi":"10.1016/j.scispo.2023.01.004","DOIUrl":"10.1016/j.scispo.2023.01.004","url":null,"abstract":"<div><h3>Objectives</h3><p>Reactive Strength Index (RSI) is a neuromuscular assessment used to measure stretch–shortening cycle (SSC) function of the lower limb. Increased RSI scores have been frequently associated with running performance, such as faster sprint times, greater running economy and reduced change of direction times. These locomotor activities are involved in various sports and therefore, RSI is an important indicator of athletic capacity in sport. Whilst RSI has been commonly used in studies to assess SSC performance, no review has been conducted examining the difference in RSI between athletic populations. Thus, the aim of this systematic review was to summarise the literature and determine whether there was any significant difference in RSI between different populations and summarise the underlying factors contributing to these results.</p></div><div><h3>Methods</h3><p>The systematic review protocol yielded 865 articles for screening by which 19 were included for final analysis following inclusion/exclusion criteria.</p></div><div><h3>Results</h3><p>Moderate to large differences were predominately found between different athlete populations, and the strength of these relationships varied depending on the populations being compared.</p></div><div><h3>Conclusion</h3><p>The findings indicated that relative strength is an influencing factor that differentiated RSI performance between populations. This should be an area, which practitioners aim to develop if wanting to improve reactive strength.</p></div><div><h3>Objectifs</h3><p>L’indice de force réactive (RSI) est une évaluation neuromusculaire utilisée pour mesurer la fonction du cycle d’étirement–raccourcissement (SSC) dans le membre inférieur. Des scores RSI accrus ont souvent été associés à des performances de course, telles que des temps de sprint plus rapides, une plus grande économie de course et des temps de changement de direction réduits. Ces activités locomotrices sont impliquées dans divers sports et, par conséquent, le RSI est un indicateur important de la capacité athlétique dans le sport. Alors que le RSI a été couramment utilisé dans les études pour évaluer les performances du SSC, aucune revue n’a été menée pour examiner la différence de RSI entre les populations sportives. Ainsi, le but de cette revue systématique était de résumer la littérature et de déterminer s’il y avait une différence significative de RSI entre différentes populations et de résumer les facteurs sous-jacents contribuant à ces résultats.</p></div><div><h3>Méthodes</h3><p>Le protocole de revue systématique a produit 865 articles pour la sélection, dont 19 ont été inclus pour l’analyse finale selon les critères d’inclusion/exclusion.</p></div><div><h3>Résultats</h3><p>Des différences modérées à importantes ont été principalement observées entre différentes populations d’athlètes, et la force de ces relations variait en fonction des populations comparées.</p></div><div><h3>Conclusion</h3><p>Les rés","PeriodicalId":21728,"journal":{"name":"Science & Sports","volume":"39 2","pages":"Pages 129-143"},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121452262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0