Abstract:
:The theory of deliberate practice postulates that experts are always made, not born. This theory translated to the youth-sport domain means that if athletes want to be high-level performers, they need to deliberately engage in practice during the specialization years, spending time wisely and always focusing on tasks that challenge current performance. Sport organizations in several countries around the world created specialized training centers where selected young talents practice under the supervision of experienced coaches in order to become professional athletes and integrate onto youth national teams. Early specialization and accurate observation by expert coaches or scouts remain the only tools to find a potential excellent athlete among a great number of participants. In the current study, the authors present 2 of the problems raised by talent search and the risks of such a search. Growth and maturation are important concepts to better understand the identification, selection, and development processes of young athletes. However, the literature suggests that sport-promoting strategies are being maintained despite the increased demands in the anthropometric characteristics of professional players and demands of actual professional soccer competitions. On the other hand, identifying biological variables that can predict performance is almost impossible.
journal_name
Int J Sports Physiol Performauthors
Gonçalves C EB,Rama L ML,Figueiredo ABdoi
10.1123/ijspp.7.4.390subject
Has Abstractpub_date
2012-12-01 00:00:00pages
390-3issue
4eissn
1555-0265issn
1555-0273pii
2012-0081journal_volume
7pub_type
杂志文章,评审abstract:PURPOSE:The purpose of this investigation was to quantify maximal aerobic power (VO2max) in soccer as a function of performance level, position, age, and time of season. In addition, the authors examined the evolution of VO2max among professional players over a 23-y period. METHODS:1545 male soccer players (22 ± 4 y, ...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.8.3.323
更新日期:2013-05-01 00:00:00
abstract:PURPOSE:The purpose of this project was to observe current warm-up practices in snowboard athletes and evaluate their physiological impact before competition. METHODS:An observational design was used to monitor 4 athletes (2 female) at an Open National Snowboard Cross Championships. Activity patterns, core temperature...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.7.3.295
更新日期:2012-09-01 00:00:00
abstract::Recent research has analyzed the genetic factors that influence world-class athletic status. Much of what we know comes from association studies, with the ACE I/D and ACTN3 R577X polymorphisms having been extensively studied. The association between the ACTN3 R577X variation and elite athlete status in power sports is...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.5.1.93
更新日期:2010-03-01 00:00:00
abstract:PURPOSE:To quantify possible differences in sprint mechanical outputs in handball and basketball players according to playing standard and position. METHODS:Sprint tests of 298 male players were analyzed. Theoretical maximal velocity (v0), horizontal force (F0), horizontal power (Pmax), force-velocity slope (SFV), rat...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2019-0180
更新日期:2019-10-02 00:00:00
abstract:PURPOSE:To examine the activity profiles of elite male competitors during international Taekwondo competition in relation to fin, feather, and heavy weight categories. METHODS:Twelve male Taekwondo competitors equally representing fin, feather, and heavy weight divisions were studied during the 2005 World Taekwondo Ch...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.6.3.344
更新日期:2011-09-01 00:00:00
abstract:PURPOSE:To examine the validity of 2 kinematic systems for assessing mean velocity (MV), peak velocity (PV), mean force (MF), peak force (PF), mean power (MP), and peak power (PP) during the full-depth free-weight back squat performed with maximal concentric effort. METHODS:Ten strength-trained men (26.1 ± 3.0 y, 1.81...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2016-0627
更新日期:2017-10-01 00:00:00
abstract:CONTEXT:Track-cycling team pursuit (TP) is a highly technical effort involving 4 athletes completing 4 km from a standing start, often in less than 240 s. Transitions between athletes leading the team are obviously of utmost importance. PURPOSE:To perform qualitative video analyses of transitions of world-class athlet...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2016-0596
更新日期:2017-11-01 00:00:00
abstract::Recent psychophysiological models of endurance performance explained that pacing strategies and exercise-intensity regulation influence cyclists' ability to produce high mean power output (PO) during time trials (TTs). However, the relationships between these pacing strategies and psychological parameters of the athle...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2017-0773
更新日期:2019-04-01 00:00:00
abstract:PURPOSE:To quantify the power-output demands of men's road-cycling stage racing using a direct measure of power output. METHODS:Power-output data were collected from 207 races over 6 competition years on 31 Australian national male road cyclists. Subjects performed a maximal graded exercise test in the laboratory to d...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.1.4.324
更新日期:2006-12-01 00:00:00
abstract:PURPOSE:Previously it has been observed that, in well-trained 800-m athletes, VO2max is not attained during middle-distance running events on a treadmill, even when a race-type pacing strategy is adopted. Therefore, the authors investigated whether specialization in a particular running distance (400-m or 800-m) influe...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2.2.128
更新日期:2007-06-01 00:00:00
abstract:PURPOSE:The main objective of this study was to investigate the efficacy of both programmed (speed, agility, and quickness; SAQ) and random (small-sided games; SSG) conditioning methods on selected neuromuscular and physical performance variables. METHODS:Twenty volunteers (21.1 +/- 4.0 y, 1.71 +/- 0.09 m, 66.7 +/- 9....
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijspp.4.4.494
更新日期:2009-12-01 00:00:00
abstract:CONTEXT:Successful elite sprint to long-distance runners are known to have shorter ground-contact time (GCT) than their less successful counterparts. PURPOSE:To investigate whether augmented feedback (aF) about GCT can reduce the time on ground (TOG) per minute in long-distance runners and, if so, whether this reducti...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijspp.2016-0746
更新日期:2018-01-01 00:00:00
abstract:PURPOSE:This study examined the effects of Ramadan on cycling repeated-sprint ability (RSA) and corresponding diurnal variations. METHODS:Twelve active men performed an RSA test (5 × 6-s maximal sprints interspersed with 24 s passive recovery) during morning and afternoon sessions 1 wk before Ramadan (BR), during the ...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.8.3.254
更新日期:2013-05-01 00:00:00
abstract:PURPOSE:Self-report (SR) has been the primary method used to assess fluid intake during endurance events, but unfortunately, little is known about the validity of SR. The purpose of this study was to compare SR fluid intake with direct measurement (DM) during a 70.3-mile triathlon. METHODS:Fifty-three (42 men, 11 wome...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2014-0358
更新日期:2015-07-01 00:00:00
abstract:PURPOSE:This study examined the influence of 10 days of intensified training on salivary cortisol and testosterone responses to 30-min, high-intensity cycling (55/80) in a group of male elite triathletes. METHODS:Seven elite male triathletes (age 19 ± 1 y, VO2max 67.6 ± 4.5 mL · kg-1 · min-1) completed the study. Swim...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2014-0360
更新日期:2015-10-01 00:00:00
abstract:PURPOSE:The authors investigated the association between risk of tendinopathies and genetic markers in professional team sports. METHODS:The authors studied 363 (mean [SD]; 25 [6] y, 89% male) elite players (soccer, futsal, basketball, handball, and roller hockey) from a top-level European team (FC Barcelona, Spain). ...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2019-0431
更新日期:2019-10-14 00:00:00
abstract:PURPOSE:To compare psychophysiological responses to 6 repeated-sprint sessions in normobaric hypoxia (RSH) and normoxia (RSN) in team-sport athletes during a 2-wk "live high-train low" training camp. METHODS:While residing under normobaric hypoxia (≥14 h/d, FiO2 14.5-14.2%), 23 lowland elite field hockey players perfo...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2016-0052
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:The time-motion characteristics and the within-athlete variability in movement patterns were quantified for the same male fast bowler playing One Day International (ODI) cricket matches (n=12). METHODS:A number of different time motion characteristics were monitored using a portable 5-Hz global positioning sys...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.4.2.278
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVES:To evaluate the current evidence regarding the quantification of cricket fast-bowling skill. METHODS:Studies that assessed fast-bowling skill (bowling speed and accuracy) were identified from searches in SPORTDiscus (EBSCO) in June 2017. The reference lists of identified papers were also examined for releva...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章,评审
doi:10.1123/ijspp.2017-0169
更新日期:2018-08-01 00:00:00
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journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2017-0302
更新日期:2018-03-01 00:00:00
abstract::The National Basketball Association (NBA) has an extremely demanding competition schedule, requiring its athletes to compete in 82 regular-season games over a 6-mo period (∼3.4 games/wk). Despite the demanding schedule and high value of athletes, there is little public information on the specific game and training dem...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2018-0384
更新日期:2019-04-01 00:00:00
abstract:PURPOSE:This study aimed to compare the effects of 5 different 18-week in-season strength training programs on strength gains and specific water polo performance. METHODS:A total of 56 young male water polo players were randomly assigned to the following 5 training groups: dry-land strength training, in-water-specific...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2020-0046
更新日期:2021-01-28 00:00:00
abstract::Purpose: To establish levels of association between physical fitness and match activity profiles of players in the Australian Football League (AFL) participation pathway. Methods: Players (N = 287, range 10.9-19.1 y) were assessed on 20-m sprint, AFL agility, vertical jump and running vertical jump, 20-m multistage fi...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2018-0488
更新日期:2019-07-01 00:00:00
abstract:PURPOSE:To determine the effect of altitude training at 1600 and 1800 m on sea-level (SL) performance in national-level runners. METHODS:After 3 wk of SL training, 24 runners completed a 3-wk sojourn at 1600 m (ALT1600, n = 8), 1800 m (ALT1800, n = 9), or SL (CON, n = 7), followed by up to 11 wk of SL racing. Race per...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章,多中心研究
doi:10.1123/ijspp.2018-0104
更新日期:2019-03-01 00:00:00
abstract:PURPOSE:To assess the utility of a self-paced maximal oxygen uptake (VO2max) test (SPV) in eliciting an accurate measure of VO2max in comparison with a traditional graded exercise test (GXT) during motorized treadmill exercise. DESIGN:This was a cross-sectional experimental study whereby recreationally trained men (n ...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2014-0052
更新日期:2015-01-01 00:00:00
abstract:UNLABELLED:The contractile history of muscle can potentiate electrically evoked force production. A link to voluntary force production, related in part to an increase in reflex excitability, has been suggested. PURPOSE:Our purpose was to quantify the effect of postactivation potentiation on voluntary force production ...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.3.2.219
更新日期:2008-06-01 00:00:00
abstract:CONTEXT:Muscle imbalances aid in the identification of athletes at risk for lower-extremity injury. Little is known regarding the influence that leg preference or playing position may have on lower-extremity muscle strength and asymmetry. PURPOSE:To investigate lower-extremity strength profiles in rugby union athletes...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2015-0241
更新日期:2016-05-01 00:00:00
abstract::Purpose: The hyperbolic distance-time relationship can be used to profile running performance and establish critical speed (CS) and D' (the curvature constant of the speed-time relationship). Typically, to establish these parameters, multiple (3+) performance trials are required, which can be highly fatiguing and limi...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2017-0809
更新日期:2019-05-01 00:00:00
abstract:CONTEXT:Although skin-temperature assessment has received much attention in recent years as a possible internal-load measurement, scientific evidence is scarce. PURPOSE:To analyze baseline skin temperature and its rewarming through means of a cold-stress test before and after performing a marathon and to study the ass...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章
doi:10.1123/ijspp.2019-0963
更新日期:2020-05-29 00:00:00
abstract::Evidence indicates that low-level laser therapy (LLLT) minimizes fatigue effects on muscle performance. However, the ideal LLLT dosage to improve athletes'performance during sports activities such as cycling is still unclear. Therefore, the goal of this study was to investigate the effects of different LLLT dosages on...
journal_title:International journal of sports physiology and performance
pub_type: 杂志文章,随机对照试验
doi:10.1123/ijspp.2016-0187
更新日期:2018-01-01 00:00:00