International journal of sports physiology and performance最新文献_第6页

Hormonal Contraceptive Use and Self-Reported Menstrual Cycle-Related Symptom Frequency and Severity in Norwegian Team Handball Players of Different Competition Levels. 不同水平挪威手球运动员使用激素避孕药与月经周期相关症状的频率和严重程度

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-14 Print Date: 2025-04-01 DOI: 10.1123/ijspp.2023-0382

John O Osborne, Erik P Andersson, Sigurd Pedersen, Boye Welde, Svein Arne Pettersen, Aina Emaus, Guro Strøm Solli, Tora Vilje D Gunnarshaug, Tina Pettersen Engseth

{"title":"Hormonal Contraceptive Use and Self-Reported Menstrual Cycle-Related Symptom Frequency and Severity in Norwegian Team Handball Players of Different Competition Levels.","authors":"John O Osborne, Erik P Andersson, Sigurd Pedersen, Boye Welde, Svein Arne Pettersen, Aina Emaus, Guro Strøm Solli, Tora Vilje D Gunnarshaug, Tina Pettersen Engseth","doi":"10.1123/ijspp.2023-0382","DOIUrl":"10.1123/ijspp.2023-0382","url":null,"abstract":"Purpose: To compare the frequency and severity of self-perceived negative symptoms associated with the menstrual cycle or hormonal-contraceptive (HC) cycle between (1) HC users and non-HC users and (2) different competition levels. An additional aim was to describe the rate and type of HC use and prevalence of potential menstrual-cycle disturbances in female team handball players.Methods: A total of 136 team handball players, competing at different levels (international, 48; national, 52; local/regional, 36), completed a cross-sectional survey regarding self-reported negative cycle-related symptom frequency and severity, perceived influence on training/competition performance, menstrual function, and current and/or past HC use.Results: Although most players regularly experienced negative cycle-related symptoms, non-HC users reported more frequent and severe cramps (P = .001 to .026), as well as a higher occurrence of fatigue and skin problems (P = .019 to .045), compared with HC users. Negative symptoms such as fatigue were more common and severe for local/regional-level players compared with players at higher (international) competition levels (P = .006-.046). Half (47%) of the players currently used HC, primarily long-acting reversible contraceptives (52%), as well as the combined oral (33%) or progestin-only pill (14%). Notably, only 2% of players altered their training in response to negative cycle-related symptoms, despite 41% perceiving that these symptoms interfered with training quality and athletic performance.Conclusions: Negative cycle-related symptoms are common among team handball players, regardless of HC use, and are perceived by many players to adversely influence their athletic performance.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"515-523"},"PeriodicalIF":3.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143425445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

What It Takes to Win: Examining Predicted Versus Actual Swimming Performances at the Paris 2024 Olympic Games, and What Comes Next. 获胜的条件：2024年巴黎奥运会游泳选手的预测与实际表现对比，以及接下来会发生什么。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-13 Print Date: 2025-04-01 DOI: 10.1123/ijspp.2024-0409

Cormac Powell, David B Pyne, Emmet Crowley, Iñigo Mujika

{"title":"What It Takes to Win: Examining Predicted Versus Actual Swimming Performances at the Paris 2024 Olympic Games, and What Comes Next.","authors":"Cormac Powell, David B Pyne, Emmet Crowley, Iñigo Mujika","doi":"10.1123/ijspp.2024-0409","DOIUrl":"10.1123/ijspp.2024-0409","url":null,"abstract":"Predictions of performances should be evaluated to confirm their accuracy. Work by this group has resulted in 3 sets of predictions being generated for swimming events at the Paris 2024 Olympic Games, using the same statistical approach for each set.Purpose: To examine the accuracy of swimming predictions for the Paris 2024 Olympic Games and generate updated predictions for both the Singapore 2025 World Aquatics Championships and Los Angeles 2028 Olympic Games.Methods: A linear regression and forecasting function was used to generate predictions for the Paris 2024 Olympic Games across 3 performance categories (rank 1st-3rd, 4th-8th, and 9th-16th). Mean absolute error was used to assess the accuracy of the predicted versus actual Paris 2024 Olympic Games times for all events across the 3 performance categories. New predictions for the 2028 Olympic cycle were subsequently generated using results from the World Championships and Olympic Games between 2011 and 2024.Results: Across all events, a mean absolute error value of 0.84% was observed between the Paris 2024 Olympic Games predicted and actual times. Predicted times were highly correlated with actual times (r2 = .99). Across the 3 sets of predictions (created in 2022, 2023, and 2024), the 2023 set of predictions had the lowest overall mean absolute error value (0.55%).Conclusions: The methods used to create predictions for swimming performances at the Paris 2024 Olympic Games were deemed accurate. These methods enable national swimming federations to create a series of predictions for a given major championship, inform athlete identification and development pathways, and allocate appropriate resources, including sport-science provision.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"504-514"},"PeriodicalIF":3.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143413711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Immediate Effects of Overnight Long-Haul Travel on Physical and Cognitive Performance and Sleep in Professional Male Rugby Union Players (a 2-Part Study). 夜间长途旅行对职业橄榄球联盟男子运动员身体和认知表现以及睡眠的直接影响（一项两部分研究）。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-13 Print Date: 2025-04-01 DOI: 10.1123/ijspp.2024-0328

Kanon Uchiyama, Peter Peeling, Shona L Halson, Machar Reid, Karen Wallman, Jennifer Walsh, Suzanna Russell, Simon Thomas, Olivier Girard

{"title":"Immediate Effects of Overnight Long-Haul Travel on Physical and Cognitive Performance and Sleep in Professional Male Rugby Union Players (a 2-Part Study).","authors":"Kanon Uchiyama, Peter Peeling, Shona L Halson, Machar Reid, Karen Wallman, Jennifer Walsh, Suzanna Russell, Simon Thomas, Olivier Girard","doi":"10.1123/ijspp.2024-0328","DOIUrl":"10.1123/ijspp.2024-0328","url":null,"abstract":"Background: Travel can disrupt sleep and reduce perceived recovery in athletes. While the impact of travel on physical performance has been studied, its effect on cognitive performance remains unexplored.Purpose: This study investigated the consequences of overnight long-haul travel on physical (part I) and cognitive performance (part II) in professional rugby players traveling overseas for competition.Methods: In part I (n = 24), vertical-jump performance was assessed across 5 mornings surrounding travel (HOME, TRAVEL, and AWAY 1, 2, and 3). In part II (n = 24), mental fatigue and psychomotor vigilance (defined as the ability to respond to stimuli effectively) were assessed across 3 days (HOME, TRAVEL, and AWAY 1). Sleep was monitored on all nights preceding performance assessment using activity monitoring.Results: Compared with HOME, TRAVEL reduced sleep quantity (part I. -219 [112] min; part II, -334 [233] min; both P < .001) and elevated in-flight mental fatigue (part II, +12 [18]; P < .05). Psychomotor vigilance was impaired during TRAVEL (+8% [6%] in valid response latencies ≤500 milliseconds; P < .001), and reactive jump strength was reduced at AWAY 1 (-7% [10%] in drop jump; P < .001). While psychomotor vigilance was restored by AWAY 1 (after hotel sleep), reactive jump strength remained diminished until AWAY 3 (-12% [9%] in drop jump compared with HOME; P < .001) after travel.Conclusion: For teams traveling on long-haul journeys overnight for competition, it is recommended to arrive more than 3 days before matches to enable sufficient physical and cognitive recovery at the new destination to optimize performance away from home.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"530-539"},"PeriodicalIF":3.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143413225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Association Between Reactive Strength Index and Metabolic Cost of Running in Male Master Athletes. 男性运动健将反应性力量指数与跑步代谢消耗的关系

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-12 Print Date: 2025-04-01 DOI: 10.1123/ijspp.2024-0291

Maxence Tanneau, Nicolas Berryman, Iñigo Mujika, Anh P Nguyen, Darío Cappa, Jeanne Barraud, Laurent Bosquet

{"title":"Association Between Reactive Strength Index and Metabolic Cost of Running in Male Master Athletes.","authors":"Maxence Tanneau, Nicolas Berryman, Iñigo Mujika, Anh P Nguyen, Darío Cappa, Jeanne Barraud, Laurent Bosquet","doi":"10.1123/ijspp.2024-0291","DOIUrl":"10.1123/ijspp.2024-0291","url":null,"abstract":"Purpose: To examine the association between reactive strength index (RSI) and metabolic cost of running (MCr) in master athletes. We hypothesized that individuals with a higher RSI would exhibit a lower MCr, that both variables would be associated, and that age would moderate this relationship.Methods: Forty-five male master athletes participated to this study. A median split was performed to constitute 2 age groups (group 1, 47.7 [1.7] y old; group 2, 56.3 [4.6] y old). Participants underwent a single 45-minute session during which RSI was assessed with drop jumps, and MCr, during a continuous exercise of submaximal intensity performed on a treadmill.Results: A small negative association was found between net MCr and RSI in the overall sample (RSI mean r = -.38, P < .05; RSI max r = -.38, P < .05). Group 1 exhibited a lower net MCr (P < .01, d = -0.84) and higher RSI (P < .01, d > 0.82) than group 2. However, the association between the 2 measures was verified specifically in group 2 (RSI from a 20-cm drop jump, r = -.53, P < .01; RSI mean, r = -.50, P < .05; RSI maximum, r = -.57, P < .01).Conclusions: RSI is associated with net MCR in master athletes, particularly in older participants. Additional intervention studies are now required to further explore this association.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"524-529"},"PeriodicalIF":3.5,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143412841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Optimal Drop Heights in 2 Drop-Jump Exercises for Basketball Athletes With Differing Strength Levels. 不同力量水平篮球运动员两种起落练习最佳落点高度的比较。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-07 Print Date: 2025-04-01 DOI: 10.1123/ijspp.2024-0353

Leijiao Yue, Zhitao Liu, Shanwei Wang, Tianqi Lin, Cheng Liang, Jun Yin, Chenglin Liu

{"title":"Comparison of Optimal Drop Heights in 2 Drop-Jump Exercises for Basketball Athletes With Differing Strength Levels.","authors":"Leijiao Yue, Zhitao Liu, Shanwei Wang, Tianqi Lin, Cheng Liang, Jun Yin, Chenglin Liu","doi":"10.1123/ijspp.2024-0353","DOIUrl":"10.1123/ijspp.2024-0353","url":null,"abstract":"Purpose: Previous research has primarily focused on bounce drop jump (BDJ) rather than countermovement drop jump (CDJ) in studying optimal drop heights for drop jump. This study explored the biomechanic parameters of both BDJ and CDJ and their relationship with performance across varying drop heights based on the percentage of squat-jump height (SJH).Methods: Twenty-four college basketball athletes were recruited and divided into low- and high-strength groups. Participants performed BDJ and CDJ at 50%, 75%, 100%, 125%, 150%, and 175% of SJH. The point or zone with the largest reactive strength index (RSI) corresponds to the optimal drop height for a drop jump.Results: Optimal drop heights were determined to be 84.7% of SJH for BDJ low strength and 84.1% of SJH for BDJ high strength, with no significant difference between groups (P = .213). For CDJ, relative optimal drop heights were 104.6% of SJH for CDJ low strength and 106.1% of SJH for CDJ high strength, also with no significant difference (P = .717). Mechanical power with RSI exhibited a coefficient close to 1 (r = .98-.99), while average propulsive force demonstrated a very strong positive correlation with RSI (r = .72-.77).Conclusions: It is recommended that basketball athletes incorporate particular percentages of SJH into drop jump, with 75% to 100% of SJH for BDJ and 100% to 125% of SJH for CDJ, as these heights are associated with achieving an optimal RSI and mechanical power. Tailoring the inclusion of BDJ or CDJ in training should account for the specific demands of on-court positions and task objectives for basketball players.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"488-496"},"PeriodicalIF":3.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143370578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Confirmation Bias in Sport Science: Understanding and Mitigating Its Impact. 体育科学中的确认偏误：理解并减轻其影响。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-07 DOI: 10.1123/ijspp.2024-0381

Marco Beato, Alexander T Latinjak, Maurizio Bertollo, Daniel Boullosa

{"title":"Confirmation Bias in Sport Science: Understanding and Mitigating Its Impact.","authors":"Marco Beato, Alexander T Latinjak, Maurizio Bertollo, Daniel Boullosa","doi":"10.1123/ijspp.2024-0381","DOIUrl":"https://doi.org/10.1123/ijspp.2024-0381","url":null,"abstract":"Purpose: Confirmation bias, a cognitive phenomenon deeply ingrained in human thinking, shapes our perception of reality. It leads individuals to favor information that aligns with their preexisting beliefs while dismissing or undervaluing the contrary evidence. In sport science, where precision and evidence-based practices are critical aspects to optimize performance, confirmation bias can decisively impact decision-making processes. In this context, practitioners rely on both objective and subjective data to be interpreted to enhance athletic performance. However, confirmation bias introduces a subtle yet powerful distortion, which is difficult to control and quantify. We usually believe that our observations can justify expectations or predictions about future observations, as well as broader generalizations beyond what we have directly observed-inductive inferences. Researchers and practitioners may therefore unknowingly seek out evidence that confirms their beliefs, inadvertently overlooking alternative viewpoints and interpretations.Conclusions: This paper explores the concept of confirmation bias in sport science, providing practical examples in the contexts of testing, training, and monitoring. By understanding how confirmation bias operates (ie, heuristic of decision making), we may develop strategies to mitigate its effects and promote more accurate and effective decision making in sport science (eg, performance).","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"1-6"},"PeriodicalIF":3.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143370582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Fitness Profiles of Highly Trained Female Futsal Players According to Their Playing Positions. 高训练女子五人制足球运动员不同体位的体能特征。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-06 Print Date: 2025-03-01 DOI: 10.1123/ijspp.2024-0424

Rafael Albalad-Aiguabella, Elena Mainer-Pardos, Alberto Roso-Moliner, Demetrio Lozano, Germán Vicente-Rodríguez, Borja Muniz-Pardos

{"title":"Fitness Profiles of Highly Trained Female Futsal Players According to Their Playing Positions.","authors":"Rafael Albalad-Aiguabella, Elena Mainer-Pardos, Alberto Roso-Moliner, Demetrio Lozano, Germán Vicente-Rodríguez, Borja Muniz-Pardos","doi":"10.1123/ijspp.2024-0424","DOIUrl":"10.1123/ijspp.2024-0424","url":null,"abstract":"Purpose: Although women's futsal has experienced great growth recently, few studies have analyzed the physical profiles of female futsal players. The objectives of this study were to determine the physical and anthropometric characteristics in elite women's futsal using laboratory and field tests and to analyze the differences between the different playing positions.Methods: Forty-one female futsal players from the second division of the Spanish league (age 22.69 [4.76] y; body height 161.28 [6.03] cm; body mass 62.20 [10.34] kg) were evaluated for body composition with dual-energy X-ray absortiometry anthropometrically, lower-body power using a force platform (countermovement jump, squat jump, and drop jump), linear speed (5, 10, 15, and 25 m), changes of direction (505 modified, V-Cut, and L-Run), and repeated-sprint ability measured through photoelectric cells.Results: The results reveal that there are no significant differences between the physical profiles of players depending on playing position. Despite this, wingers seem to have the best physical profiles, and goalkeepers have the highest body mass index (26.9 [4.48] vs 23.3 [2.82]; P = .069) and fat percentage (31.9 [7.81] vs 29.96 [6.08]; P = .101), but they present very similar values to the other positions in all other tests performed, except for repeated-sprint ability (4.64 [0.45]; P = .009).Conclusion: Relevant descriptive data were presented to provide useful information for coaches to optimize their training programs, reporting that playing position does not identify different physical profiles in elite female futsal players.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"473-480"},"PeriodicalIF":3.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143364766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Power Loss Minimization Through Maximal Power Endurance or Repeated Power Training Programs. 通过最大的力量耐力或重复的力量训练计划，使能量损失最小化。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-02-03 Print Date: 2025-03-01 DOI: 10.1123/ijspp.2024-0200

Oliver Gonzalo-Skok, Julio Tous-Fajardo

{"title":"Power Loss Minimization Through Maximal Power Endurance or Repeated Power Training Programs.","authors":"Oliver Gonzalo-Skok, Julio Tous-Fajardo","doi":"10.1123/ijspp.2024-0200","DOIUrl":"10.1123/ijspp.2024-0200","url":null,"abstract":"Purpose: The present study analyzed the effects of a maximal-power-endurance (MPE) versus a repeated-power-ability (RPA) training program on different strength, power, and repeated-power measurements in a short- and long-term training period and the relationships between changes in all variables.Methods: Twenty-two young highly trained male basketball players were randomly allocated to 1 of the 2 groups (MPE, n = 11; RPA, n = 11) and evaluated by 1-repetition maximum and incremental load, RPA, and MPE tests in the bench-press exercise before and after a period of 4 and 8 weeks. The MPE group performed 2 to 4 sets of a postdetermined number of repetitions (ie, set stopped when maximum power output decreased >10%) using the load that maximized power output. The RPA group carried out 1 to 3 blocks of 5 sets of 5 repetitions with a load that maximized power output.Results: Both groups significantly (P < .001; effect size = 0.58; 1.56) improved 1-repetition maximum, maximum power output, and 20%, 40%, 60%, and 80% of 1-repetition maximum from pretest to posttest in the incremental load test. Significant improvements (P < .001) were found for the RPA and MPE groups in the best, mean, and last set in the RPA test at all times. Furthermore, a significant (P < .001) time × group interaction was found in the MPE test, showing significant improvements in both groups at posttest. In addition, at posttest, intraset power fluctuation in the mean was significantly (P < .05; effect size = 0.45) better in MPE group compared with RPA group.Conclusion: In conclusion, both training programs represent appropriate methods to improve neuromuscular measurements, although MPE training seems to be a more volume-efficient strategy (∼50% fewer repetitions) to enhance several fatigue-resistance indexes (intraset power fluctuation in the mean).","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"463-472"},"PeriodicalIF":3.5,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143122901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Pacing Strategy and Resulting Performance of Elite Trail Runners: Insights From the 2023 World Mountain and Trail Running Championships. 优秀越野跑运动员的配速策略和最终表现：来自2023年世界山地和越野跑锦标赛的见解。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-01-30 Print Date: 2025-03-01 DOI: 10.1123/ijspp.2024-0390

Diego Jaén-Carrillo, Arcadi Margarit-Boscà, Felipe García-Pinillos, Markus Holler

{"title":"Pacing Strategy and Resulting Performance of Elite Trail Runners: Insights From the 2023 World Mountain and Trail Running Championships.","authors":"Diego Jaén-Carrillo, Arcadi Margarit-Boscà, Felipe García-Pinillos, Markus Holler","doi":"10.1123/ijspp.2024-0390","DOIUrl":"10.1123/ijspp.2024-0390","url":null,"abstract":"Purpose: Pacing is crucial in endurance sports such as running, and its importance is also prominent in trail running due to the unique challenges, including high elevation gains and varied terrain. This study aimed to explore the pacing strategies of elite athletes during the 2023 World Mountain and Trail Running Championships for the Trail Short distance.Methods: The participants included 12 elite trail runners who provided their race data from sport watches for analysis.Results: The findings indicate a significant decrease in grade-adjusted pace (vi) as the race progressed, with an average change of -18.7% from the start to the last downhill segment. A linear correlation of -.55 (P = .031) was observed between the winning time and the evolution of vi, suggesting that more consistent pacing led to better performance. The Student t test (t = 2.628, numerator degrees of freedom = 10, P = .013) confirmed that even pacing is significantly correlated with superior race results at a confidence level above 95%.Conclusions: A more even pacing strategy is associated with success during elite trail-running races.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"449-456"},"PeriodicalIF":3.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143065542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Applying a Cluster-Analysis Approach to Monitor Training Load in Male Volleyball During the Preseason Period. 应用聚类分析方法监测男子排球季前赛训练负荷。

IF 3.5 2区医学

International journal of sports physiology and performance Pub Date : 2025-01-30 Print Date: 2025-03-01 DOI: 10.1123/ijspp.2024-0293

Gilbertas Kerpe, Aurelijus Kazys Zuoza, Daniele Conte

{"title":"Applying a Cluster-Analysis Approach to Monitor Training Load in Male Volleyball During the Preseason Period.","authors":"Gilbertas Kerpe, Aurelijus Kazys Zuoza, Daniele Conte","doi":"10.1123/ijspp.2024-0293","DOIUrl":"10.1123/ijspp.2024-0293","url":null,"abstract":"Purpose: This study aimed to (1) classify the external-load measures carried out during the preseason period by male volleyball players via cluster technique identifying the most important external-load measures and (2) assess the differences between clusters in internal-load variables.Methods: Twenty-two male Division 1 and 2 volleyball players (mean [SD] age 21.2 [3.0] y, stature 186.4 [6.0] cm, body mass 80.0[10.5 kg]) were recruited for this study. Players' external (jump, player load, acceleration, deceleration, and change of direction) and internal (percentage of peak heart rate, summated heart-rate zones, and session rating of perceived exertion) loads were monitored during 5 weeks of the preseason period for both Division 1 and Division 2 teams. External-load measures were classified via a 2-step cluster analysis followed by predicting importance analysis, while differences in internal-load measures between clusters were analyzed using linear mixed models.Results: The 3 identified clusters classified the sessions in high (C1, 30.1%) moderate (C2, 31.8%), and low (C3, 38.1%) load. Predicting importance analysis found jump as the main cluster predictor (predicting value = 1), followed by player load (predicting value = 0.73). An effect of cluster was found on each internal-load measure (P < .001), with post hoc analyses showing lower values in C3 compared with C1 and C2 (P < .05, effect sizes ranges from small to moderate).Conclusions: Volleyball coaches can adopt a monitoring system including cluster analysis to classify the preseason training sessions' load having a higher consideration for jump and player load as the main external-load measures.","PeriodicalId":14295,"journal":{"name":"International journal of sports physiology and performance","volume":" ","pages":"457-462"},"PeriodicalIF":3.5,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143065533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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