Relationship between pregame concentrations of free testosterone and outcome in rugby union.

abstract：PURPOSE:To investigate the influence of prior knowledge of exercise duration on the pacing strategies employed during game-based activities. METHODS:Twelve semiprofessional team-sport athletes (mean ± SD age 22.8 ± 2.1 y) participated in this study. Players performed 3 small-sided games in random order. In one conditi...

journal_title：International journal of sports physiology and performance

authors： Gabbett TJ,Walker B,Walker S

更新日期：2015-04-01 00:00:00

abstract：PURPOSE:Road cycling is a sport with extreme physiological demands. Therefore, there is a need to find new strategies to improve performance. Heart rate variability (HRV) has been suggested as an effective alternative for prescribing training load against predefined training programs. The purpose of this study is to ex...

journal_title：International journal of sports physiology and performance

authors： Javaloyes A,Sarabia JM,Lamberts RP,Moya-Ramon M

更新日期：2018-05-29 00:00:00

abstract：PURPOSE:To determine the relationship between distance covered and player load (PL: sum of accelerations in all 3 planes of movement) in hockey training and competition. METHODS:Elite male hockey players (N=24) wore player-tracking devices in 7 international matches and 7 training sessions. Players were arranged in 4 ...

journal_title：International journal of sports physiology and performance

authors： Polglaze T,Dawson B,Hiscock DJ,Peeling P

更新日期：2015-05-01 00:00:00

abstract：:The purpose of this study was to examine the effect that load has on the mechanics of the jump shrug. Fifteen track and field and club/intramural athletes (age 21.7 ± 1.3 y, height 180.9 ± 6.6 cm, body mass 84.7 ± 13.2 kg, 1-repetition-maximum (1RM) hang power clean 109.1 ± 17.2 kg) performed repetitions of the jump s...

journal_title：International journal of sports physiology and performance

authors： Suchomel TJ,Taber CB,Wright GA

更新日期：2016-01-01 00:00:00

abstract：PURPOSE:To compare the effects of 2 repeated-sprint training programs on fitness in soccer. METHODS:Fifteen semiprofessional soccer players (age: 24 ± 4 y; body mass: 77 ± 8 kg) completed 6 repeated-sprint training sessions over a 2-week period. Players were assigned to a straight-line (STR) (n = 8; 3-4 sets of 7 × 30...

journal_title：International journal of sports physiology and performance

authors： Taylor JM,Macpherson TW,McLaren SJ,Spears I,Weston M

更新日期：2016-11-01 00:00:00

abstract：PURPOSE:To establish the validity of smartphone photoplethysmography (PPG) and heart-rate sensor in the measurement of heart-rate variability (HRV). METHODS:29 healthy subjects were measured at rest during 5 min of guided breathing and normal breathing using smartphone PPG, a heart-rate chest strap, and electrocardiog...

journal_title：International journal of sports physiology and performance

authors： Plews DJ,Scott B,Altini M,Wood M,Kilding AE,Laursen PB

更新日期：2017-11-01 00:00:00

abstract：PURPOSE:The main purpose of the present study was to quantify the match running demands and physiological intensities of AF field and boundary umpires during match play. METHODS:Thirty-five AF umpires [20 field (age: 24.7 ± 7.7 y, body mass: 74.3 ± 7.1 kg, sum of 7 skinfolds: 67.8 ± 18.8 mm); 15 boundary (age: 29.6 ± ...

journal_title：International journal of sports physiology and performance

authors： Elsworthy N,Dascombe BJ

更新日期：2011-12-01 00:00:00

abstract：:In water polo, several high-intensity efforts are performed, leading to the fatigue process due to accumulation of hydrogen ions, and thus β-alanine supplementation could be an efficient strategy to increase the intramuscular acid buffer. Purpose To investigate whether 4 wk of β-alanine supplementation enhances parame...

journal_title：International journal of sports physiology and performance

authors： Brisola GMP,Milioni F,Papoti M,Zagatto AM

更新日期：2017-08-01 00:00:00

abstract：PURPOSE:To provide 2 general equations to estimate the maximum possible number of repetitions (XRM) from the mean velocity (MV) of the barbell and the MV associated with a given number of repetitions in reserve, as well as to determine the between-sessions reliability of the MV associated with each XRM. METHODS:After ...

journal_title：International journal of sports physiology and performance

authors： García-Ramos A,Torrejón A,Feriche B,Morales-Artacho AJ,Pérez-Castilla A,Padial P,Haff GG

更新日期：2018-03-01 00:00:00

abstract：CONTEXT:Badminton requires open and fast actions toward the shuttlecock, but there is no specific agility test for badminton players with specific movements. PURPOSE:To develop an agility test that simultaneously assesses perception and motor capacity and examine the test's concurrent and construct validity and its te...

journal_title：International journal of sports physiology and performance

authors： Loureiro Lde F Jr,de Freitas PB

更新日期：2016-04-01 00:00:00

abstract：PURPOSE:To establish appropriate work intensity for interval training that would elicit maximal oxygen uptake (VO2max) for well-trained swimmers. METHODS:Twelve male competitive swimmers completed an incremental protocol to determine the minimum velocity at VO2max (νVO2max) and, in randomized order, 3 square-wave exer...

journal_title：International journal of sports physiology and performance

authors： Sousa A,Vilas-Boas JP,Fernandes RJ,Figueiredo P

更新日期：2017-08-01 00:00:00

abstract：:The purpose of this study was to compare the pacing profiles between distance- and duration-based trials of short and long duration. Thirteen trained cyclists completed 2 time-based (6 and 30 min) and 2 distance-based (4 and 20 km) self-paced cycling time trials. Participants were instructed to complete each trial wit...

journal_title：International journal of sports physiology and performance

authors： Abbiss CR,Thompson KG,Lipski M,Meyer T,Skorski S

更新日期：2016-11-01 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

authors： Petersen C,Pyne DB,Portus MR,Karppinen S,Dawson B

更新日期：2009-06-01 00:00:00

abstract：PURPOSE:Prior research has illustrated that high volumes of aerobic exercise result in a reduction in basal concentrations of testosterone in men. Those studies were mostly conducted on recreational runners and identified reduced testosterone, but not concentrations low enough to be considered pathological. Therefore, ...

journal_title：International journal of sports physiology and performance

authors： Hooper DR,Kraemer WJ,Stearns RL,Kupchak BR,Volk BM,DuPont WH,Maresh CM,Casa DJ

更新日期：2019-02-01 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

authors： Rodas G,Osaba L,Arteta D,Pruna R,Fernández D,Lucia A

更新日期：2019-10-14 00:00:00

abstract：PURPOSE:Enhanced external counterpulsation (EECP) is a recovery strategy whose use has increased in recent years owing to the benefits observed in the clinical setting in some cardiovascular diseases (ie, improvement of cardiovascular function). However, its claimed effectiveness for the enhancement of exercise recover...

journal_title：International journal of sports physiology and performance

authors： Valenzuela PL,Sánchez-Martínez G,Torrontegi E,Montalvo Z,Lucia A,de la Villa P

更新日期：2018-09-01 00:00:00

abstract：PURPOSE:The purpose of this study was to evaluate the effectiveness of repetitions to fatigue (RTF) using absolute and relative muscle-endurance performances to estimate 1-repetition-maximum (1-RM) bench-press performance in high school male athletes. METHODS:Members of high school athletic teams (n = 118, age = 16.5 ...

journal_title：International journal of sports physiology and performance

authors： Mayhew JL,Hill SP,Thompson MD,Johnson EC,Wheeler L

更新日期：2007-09-01 00:00:00

abstract：PURPOSE:The study aimed to analyze the validity and reliability of commercially available nondifferential Global Positioning System (NdGPS) devices for measures of total distance during linear, multidirectional and soccer-specific motion at 1-Hz and 5-Hz sampling frequencies. METHODS:Linear (32 trials), multidirection...

journal_title：International journal of sports physiology and performance

authors： Portas MD,Harley JA,Barnes CA,Rush CJ

更新日期：2010-12-01 00:00:00

abstract：UNLABELLED:Anthropometrical and physical characteristics have been used to distinguish players of different competition levels and position groups; however, there is no literature on rugby sevens. PURPOSE:To compare the anthropometrical and physical characteristics of international and provincial rugby sevens players ...

journal_title：International journal of sports physiology and performance

authors： Ross A,Gill ND,Cronin JB

更新日期：2015-09-01 00:00:00

abstract：PURPOSE:To investigate the effects of an extreme uphill marathon on the mechanical parameters that are likely to affect the energy cost of running (Cr). METHODS:Eleven runners (27-59 y) participated in the Etna SuperMarathon (43 km, 0-3063 m above sea level). Anthropometric characteristics, maximal explosive power of ...

journal_title：International journal of sports physiology and performance

authors： Lazzer S,Salvadego D,Taboga P,Rejc E,Giovanelli N,di Prampero PE

更新日期：2015-03-01 00:00:00

abstract：PURPOSE:To describe the demand of recent World Cup (WC) races comparing top-10 (T10) and non-top-10 (N-T10) performances using power data. METHODS:Race data were collected in 1-d World Cup races during the 2012-2015 road cycling seasons. Seven female cyclists completed 49 WC races, finishing 25 times in T10 and 24 tim...

journal_title：International journal of sports physiology and performance

authors： Menaspà P,Sias M,Bates G,La Torre A

更新日期：2017-11-01 00:00:00

abstract：PURPOSE:To quantify the external training loads of positional groups in preseason training drills. METHODS:Thirty-three elite rugby league players were categorized into 1 of 4 positional groups: outside backs (n = 9), adjustables (n = 9), wide-running forwards (n = 9), and hit-up forwards (n = 6). Data for 8 preseason...

journal_title：International journal of sports physiology and performance

authors： Cummins C,McLean B,Halaki M,Orr R

更新日期：2017-07-01 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

authors： Ouvrard T,Groslambert A,Grappe F

更新日期：2019-04-01 00:00:00

abstract：PURPOSE:To (1) compare the pacing strategies of different-level open-water swimmers during the 10-km race of the FINA 2015 Swimming World Championships and (2) relate these pacing strategies to the race performance. METHODS:Final and intermediate split times, as well as intermediate race positions, from the 10-km race...

journal_title：International journal of sports physiology and performance

authors： Rodriguez L,Veiga S

更新日期：2018-07-01 00:00:00

abstract：PURPOSE:To examine variations in neuromuscular and hormonal status and their relationship to performance throughout a season of elite Australian Rules Football (ARF). METHODS:Fifteen elite ARF players performed a single jump (CMJ1) and 5 repeated countermovement jumps (CMJ5), and provided saliva samples for the analys...

journal_title：International journal of sports physiology and performance

authors： Cormack SJ,Newton RU,McGuigan MR,Cormie P

更新日期：2008-12-01 00:00:00

abstract：PURPOSE:To describe and analyze the distribution of internal training load (ITL), recovery, and physical performance of professional volleyball players throughout 1 season. METHODS:Fifteen male professional Brazilian volleyball players participated in this study. The session rating of perceived exertion (s-RPE) and To...

journal_title：International journal of sports physiology and performance

authors： Debien PB,Mancini M,Coimbra DR,de Freitas DGS,Miranda R,Bara Filho MG

更新日期：2018-10-01 00:00:00

abstract：PURPOSE:The present study aimed to verify if practicing tackles during rugby union training sessions would affect the players' internal training load and acute strength loss. METHOD:A total of 9 male Italian Serie A rugby union players (age: 21 [2] y) were monitored by means of an integrated approach across 17 session...

journal_title：International journal of sports physiology and performance

authors： Lupo C,Ungureanu AN,Boccia G,Licciardi A,Rainoldi A,Brustio PR

更新日期：2021-01-05 00:00:00

abstract：PURPOSE:To analyze the reliability and validity of a simple computation method to evaluate force (F), velocity (v), and power (P) output during a countermovement jump (CMJ) suitable for use in field conditions and to verify the validity of this computation method to compute the CMJ force-velocity (F-v) profile (includi...

journal_title：International journal of sports physiology and performance

authors： Jiménez-Reyes P,Samozino P,Pareja-Blanco F,Conceição F,Cuadrado-Peñafiel V,González-Badillo JJ,Morin JB

更新日期：2017-01-01 00:00:00

abstract：PURPOSE:Foot-strike patterns (FSP) in running are related to certain impact kinetics during ground contact. A rear-foot strike (RFS) has been associated with higher impact forces, whereas a forefoot strike (FFS) is assumed to minimize these impact forces. This study investigated the effects of running with RFS or FFS o...

journal_title：International journal of sports physiology and performance

authors： Schroeder J,Erthel F,Hollander K

更新日期：2019-12-19 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

authors： Ebert TR,Martin DT,Stephens B,Withers RT

更新日期：2006-12-01 00:00:00