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training load characteristics and injury and illness risk identification in elite youth ski racing:A prospective study

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Journal of Sport and Health Science 2021年第2期10卷 230-236页

作者： Carolin Hildebrandt Renate Oberhoffer Christian Raschner Erich Muller Christian Fink Lisa Steidl-Muller Department of Sport Science University of InnsbruckInnsbruck 6020Austria Department of Sport and Health Science Preventative PediatricsTechnical University of MunichMunich 80992Germany Department of Sport Science and Kinesiology University of SalzburgSalzburg 5400Austria GelenkpunktSports and Joint Surgery Innsbruck 6020Austria

Purpose:The study aimed to investigate the role of training load characteristics and injury and illness risk in youth ski ***:The training load characteristics as well as traumatic injuries,overuse injuries,and illnesses of 91 elite youth ski racers(age=12.1±1.3 years,mean±SD)were prospectively recorded over a period of 1 season by using a sport-specific online *** linear regression analyses were performed to monitor the influence of training load on injuries and *** in mean training load characteristics between preseason,in-season,and post-season were calculated using multivariate analyses of ***:Differences were discovered in the number of weekly training sessions(p=0.005)between pre-season(4.97±1.57)and post-season(3.24±0.71),in the mean training volume(p=0.022)between in-season(865.8±197.8 min)and post-season(497.0±225.5 min)and in the mean weekly training intensity(Index)(p=0.012)between in-season(11.7±1.8)and post-season(8.9±1.7).A total of 185 medical problems were reported(41 traumatic injuries,12 overuse injuries,and 132 illnesses).The weekly training volume and training intensity was not a significant risk factor for injuries(p>0.05).training intensity was found to be a significant risk factor for illnesses in the same week(β=0.348;p=0.044;R^(2)=0.121)and training volume represents a risk factor for illnesses in the following week(β=0.397;p=0.027;R^(2)=0.157).Conclusion:A higher training intensity and volume were associated with increased illnesses,but not with a higher risk of *** training and ensuring appropriate progression of training load between weeks may decrease incidents of illness in-season.

关键词： Health problems Injury and illness prevention training load Youth ski racing

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Comparison of Cardiovascular Parameters and Internal training load of Different 1-h training Sessions in Non-elite CrossFit^(®)Athletes

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Journal of Science in Sport and Exercise 2023年第2期5卷 130-141页

作者： Nicole Meier Danien Sietmann Annette Schmidt Institut Für Sportwissenschaft Fakultät Für HumanwissenschaftenUniversität Der Bundeswehr MünchenWerner‑Heisenberg‑Weg 3985577 NeubibergGermany

Purpose The fact that CrossFit^(®)is the best-known and rapidly growing concept for high-intensity interval training(HIIT)and high-intensity functional training(HIFT)results in a continuous increase of athletes performing CrossFit^(®).In the more than 15,000 CrossFit^(®)Affiliates worldwide,the training concept is usually offered in 1-h training sessions containing the CrossFit^(®)-related workout of the day(WOD),as well as a general warm-up,movement demonstrations,and skill ***,we report how physiological parameters measured by heart rate(HR)values vary during four different 1-h CrossFit^(®)training sessions of non-elite athletes(n=27)in a local affiliated training center and what influencing factors may *** The duration of the 1-h training sessions were divided into a warm-up part(WU-part),a skill development part combined with strength exercises(A-part),followed by the WOD part(B-part).Results Analysis of HR values shows high training intensity(≥91%HR_(max))not throughout the duration of each training session,only during *** mean HR values in B-part differ significantly compared to the remaining training parts(Ptraining *** of different CrossFit^(®)experience levels revealed no significant differ-ence in acute physiological demands and training load between beginner and experienced CrossFit^(®)*** Our results may suggest that practicing CrossFit^(®)in 1-h training sessions combined anaerobic and aerobic exercise intensities,with the training concept allows beginners and experienced athletes to be trained with the same cardio-vascular responses and training intensities.

关键词： CrossFit^(®)performance training load Exercise intensity Cardiovascular response High-intensity functional training

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Mind the “Gap”: A Comparison of the Weekly training loads of English Premier League Academy Soccer Players in Under 23, Under 18 and Under 16 Age-Groups

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Journal of Science in Sport and Exercise 2023年第1期5卷 34-43页

作者： Jonathan M.Taylor Jonathan L.Madden Frances Hunter Ben J.Thorne Shaun J.McLaren School of Health and Life Sciences Teesside UniversityMiddlesbroughUK Leeds United Football Club LeedsUK Middlesbrough Football Club MiddlesbroughUK Hintsa Performance LondonUK Department of Sport and Exercise Sciences Durham UniversityDurhamUK

Purpose The transition into full-time training represents a key period in the development of young soccer *** we compared the weekly training loads(matches,field-,and resistance-training)of English Premier-League Academy soccer players from under-16(U16),under-18(U18)and under-23(U23)age-groups during a training *** Forty players(U16 n=13,U18 n=15 and U23 n=12)were monitored using global navigation satellite systems and differential ratings of perceived exertion(dRPE).External load metrics were total distance,high-speed running distance,[absolute:≥19.8 km/h,relative:≥87%of 30-15 final-velocity(vIFT)],sprint distance(absolute:≥25.2 km/h,relative:≥80%maximal sprint speed),and dynamic stress *** load metrics were dRPE training *** Other than relative sprint distance,overall weekly external training loads were substantially greater for U18s and U23s when compared with U16s[effect size range:1.09-1.99(moderate to large);±90%confidence limits~0.45].When compared with U16s,overall internal loads were substantially greater for U18s[0.69-0.95(moderate);±~0.40],but not *** in weekly training loads between U18s and U23s were *** Substantial differences in training loads between elite U16 players and their older counterparts,indicates the need for planned increases in training loads in anticipation of the transition into full-time training.

关键词： Team-sports RPE LTAD Individualised training training load

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Utility of the“RMSSD-Slope”to Assess the Internal load in Different Sports Situations

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Health 2019年第6期11卷 683-691页

作者： Jose F.Ruso-Alvarez Claudio Nieto-Jiménez Alejandro Munoz-López Jose Naranjo Orellana Pablo de OlavideUniversity SevillaSpain Universidad del Desarrollo SantiagoChile

The control of training load has become a very interesting field for investigation in sports, but few tools are used to assess internal training load (ITL). The aim of this study is to use a post-exercise analysis methodology in different athletes and situations to establish its utility and reliability as a measure of ITL. In a retrospective review, we analysed 112 measurements of 74 subjects (38 men and 36 women) grouped in: University students (UNI);national team (FUTSAL 1);university team (FUTSAL 2);athletes (ATL);badminton players (BADM). Measures of Heart Rate Variability (HRV) were made with a Polar V800 with a thoracic band H10, during 5 minutes in a seated position after exercise. We calculated the Root Mean Square of the successive differences between adjacent RR intervals (RMSSD) and its slope from exercise to recovery. Measurements from UNI, FUTSAL-2, ATL-M and ATL-F were grouped into three categories of intensity (60%, 75% and 100%). RMSSD-Slope values were lower as intensity increased but different for every subject. In the BADM and FUTSAL-1 groups, RMSSD-Slope was progressively lower after consecutive matches for every player. The RMSSD-Slope seems to be a very accurate method to assess ITL.

关键词： HRV training load rMSSD Recovery

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