The activity profiles of highly trained young soccer players were examined in relation to age, playing position and physical capacity. Time-motion analyses (global positioning system) performed on 77 (U13–U18; fullbacks [FB], centre-backs [CB], midfielders [MD], wide [W], second strikers [2ndS] [S]) during 42 international club games. Total distance covered (TD) very high-intensity activities (VHIA; >16.1 km·h−1) computed 186 entire player-matches. Physical capacity was assessed via field...

Buchheit, M, Mendez-Villanueva, A, Delhomel, G, Brughelli, and Ahmaidi, S. Improving repeated sprint ability in young elite soccer players: shuttle sprints vs. explosive strength training. J Strength Cond Res 24(10): 2715-2722, 2010-To compare the effects of (ExpS) (RS) training on (RSA) players, 15 male adolescents (14.5 ± 0.5 years) performed, addition to their program, RS (n = 7) or ExpS 8) once a week for total 10 weeks. consisted 2-3 sets 5-6 × 15- 20-m interspersed with 14 seconds...

The aims of the current study were to examine magnitude between-GPS-models differences in commonly reported running-based measures football, between-units variability, and assess effect software updates on these measures. Fifty identical-brand GPS units (15 SPI-proX 35 SPIproX2, 15 Hz, GPSports, Canberra, Australia) attached a custom-made plastic sled towed by player performing simulated match running activities. data collected during training sessions over 4 wk from professional football...

We investigated age-related differences in the relationships among acceleration, maximum running speed, and repeated-sprint performance 61 highly trained young male soccer players (Under 14, n = 14; Under 16, 22; 18, 25). also examined possible influence of anthropometry (stature, body mass, fat-free mass) biological maturation (age at peak height velocity) on those three sprint-running qualities. Players were tested for 10-m sprint (acceleration), flying 20-m (maximum speed), 10 × 30-m...

This study examined the occurrence and nature of repeated-sprint sequences (RSS) in highly-trained young soccer players, as a function age, playing position time. Time-motion analyses using global positioning system (GPS) were performed on 99 (U13, U14, U15, U16, U17 U18) players during 42 international games. Sprint activities defined at least 1-s run intensities higher than 61% individual peak running velocity; RSS, minimum 2 consecutive sprints interspersed with maximum 60 s. During first...

The purpose of this study was to quantify match play intensity distribution in young soccer players relation age, playing position and physical fitness. Distance covered heart rate were measured (global positioning system) on 103, highly-trained (Under13 Under 18) during 42 international club games. Maximal sprinting speed (MSS), estimated maximal aerobic (MAS) (HRmax) assessed via field test measures. (HR) categorized into 5 zones relative MSS MAS HR(max), respectively. Intensity...

The impact of fitness characteristics on tennis performance in adolescent players is not clearly understood. Therefore, the aim present study was to test whether physical are related players' competitive level (i.e., national youth ranking). A secondary compare by regional selected and team). total 902 male female junior (aged, 11-16 years) Germany were evaluated using a testing battery: grip strength; countermovement jump; 10 20-m sprint; tennis-specific overhead, forehand, backhand...

Abstract The aim of the present study was to examine, in highly trained young soccer players, mechanical horizontal determinants acceleration (Acc) and maximal sprinting speed (MSS). Eighty-six players (14.1 ± 2.4 year) performed a 40-m sprint assess Acc MSS. Speed measured with 100-Hz radar, theoretical velocity (V0), force (F0) power (Pmax) were calculated. Within each age group, classified as high Acc/fast MSS (>2% faster than group mean), medium (between -2% +2%), low/slow slower). very...

Purpose: To compare the effects of unilateral and bilateral resistance training on single-leg power output, between-limbs imbalance (BLI), deficit (BLD), change direction (COD), linear sprinting jumping performance in young elite basketball players. Methods: Twenty-two (U-16–U-19) male players were randomly assigned either to an exclusive (UNI) (n = 11) or a (BIL) resistance-training group during 6-wk period. Both groups consisted 3 90° back-squat sets. A postdetermined number repetitions...

Purpose: The aim of the current study was to compare effects speed/agility (S/A) training with sprint interval (SIT) on acceleration and repeated ability (RSA) in well-trained male handball players. Methods: In addition their normal program, players performed either S/A (n = 7) or SIT for 4 wk. Speed/agility sessions consisted 3 series 6 exercises (eg, agility drills, standing start very short sprints, all <5 s duration); each repetition interspersed 30 min passive recovery, respectively....

The aim of the study was to examine whether differences in playing level influence activity profile and physiological demands advanced recreational veteran men's tennis players during an hour match play. Ten (International Tennis Number [ITN] 3-5, 45.3 +/- 5.1 years) 10 (ITN 7-9, 44.8 4.7 participated 4 experimental sessions: (1) ITN on-court assessment, (2) a laboratory incremental treadmill test, (3) simulated play, (4) 30 minutes play using portable gas analyzer. Subjects' VO2 heart rate...

To analyze the effects of 2 different eccentric-overload training (EOT) programs, using a rotational conical pulley, on functional performance in team-sport players. A traditional movement paradigm (ie, squat) including several sets 1 bilateral and vertical was compared with novel exercise each set unilateral multi-directional movements.Forty-eight amateur or semiprofessional players were randomly assigned to an EOT program either same (CBV, n = 24) (squat) multidirectional (VUMD, movements....

Given the prevalence of hamstring injuries in football, a rehabilitation program that effectively promotes muscle tissue repair and functional recovery is paramount to minimize reinjury risk optimize player performance availability.This study aimed assess concurrent effectiveness administering an individualized multifactorial criteria-based algorithm (rehabilitation [RA]) on injury comparison with using general protocol (RP).Implementing double-blind randomized controlled trial approach, two...

This study assessed the relationship between peak match speed (PMS) and maximal sprinting (MSS) in regard to age playing positions. MSS absolute PMS (PMSAbs) were collected from 180 male youth soccer players (U13-U17, 15.0 ± 1.2 y, 161.5 9.2 cm, 48.3 8.7 kg). The fastest 10-m split over a 40-m sprint was used determine MSS. PMSAbs recorded using global positioning system also expressed as percentage of (PMSRel). Sprint data compared groups Results showed that regardless positions, faster...

The objectives of this study were to examine the consequences an acute hamstring injury on performance and mechanical properties sprint-running at time returning sports after subsequent ~2 months regular soccer training return. 28 semi-professional male players, 14 with a recent history unilateral without prior injury, participated in study. All players performed two 50-m maximal sprints when cleared return play (Test 1), 11 injured same sprint test about 2 2). Sprint (i. e., speed) was...