Frequent and intense accelerations decelerations are crucial elements of match play.1–4 Both expose players to high levels mechanical stress, recognised as key contributors overall biomechanical load,5 may exert a significant impact on performance potential (eg, ability sustain force output attenuation). Consequently, important variables monitor.6 The use newly available motion tracking technologies has permitted more comprehensive characterisation the external loads associated with...

High-intensity horizontal decelerations occur frequently in team sports and are typically performed to facilitate a reduction momentum preceding change of direction manoeuvre or following sprinting action. The mechanical underpinnings deceleration unique compared other high-intensity locomotive patterns (e.g., acceleration, maximal speed), characterised by ground reaction force profile high impact peaks loading rates. conditions observed when performing rapid can lead tissue damage...

Harper, DJ, Jordan, AR, and Kiely, J. Relationships between eccentric concentric knee strength capacities maximal linear deceleration ability in male academy soccer players. J Strength Cond Res 35(2): 465-472, 2021-The purpose of this study was to investigate the relationships ability, flexor (KF) extensor (KE) strength. Fourteen players completed a 30-m sprint, test, KF KE contractions both dominant leg (DL) nondominant (NDL) at slower (60°·s-1) faster (180°·s-1) angular velocities on an...

Radar technology has the potential for providing new insights into maximal horizontal deceleration ability. This study aimed to investigate intra- and inter-day reliability sensitivity of kinematic kinetic variables obtained from a novel, test, using radar technology. Thirty-eight university sport athletes completed testing intra-day analysis. Twelve these participants also test on second day The required decelerate maximally following 20 m sprint acceleration. Reliability was assessed...

Agility is a complex skill that influenced by several physical, technical and cognitive factors. In this position stand, we discuss agility as it relates to invasion sports such the many football codes. An important concept when conceptualising understanding how applied on field or court. particularly in contests between attackers defenders. For example, an attacker needs create space separation from defenders, order evade maintain possession of ball. Conversely, defenders may require reduce...

Horizontal deceleration is a critical locomotor skill underpinning the many changes of speed and direction performed by athletes in multi-directional sports. Despite its importance there are currently no evidence-based guidelines on how to improve horizontal ability. Therefore, aim this article provide practitioners tasked with preparing for demands sports practical recommendations their athlete’s The proposes concept use Braking Performance Framework help guide selection training methods...

The aim of this study was to investigate the relationships between knee and ankle strength horizontal deceleration performance following different sprint distances. Fifty-seven (n = 41male, n 16 female) youth team-sports athletes completed: a) 5-m 10-m ability (HDA) tests; b) concentric (60°/s, 180°/s) eccentric (30°/s) relative peak torque (PT) measurements extensor (KE) flexor (KF) muscles plantarflexion (APF) dorsiflexion (ADF) in an isokinetic dynamometer. Pearson's correlation...

This study aimed to investigate the perception of soccer strength and conditioning (S&C) coaches on importance upper body (UB) training for performance high-intensity actions (HIA) (i.e., sprinting, repeated sprint ability, change direction, jumping) in professional players, identify current practices with regards UB testing methodologies within this sport. Eighty-six S&C working players volunteered complete survey. Twenty-two fixed responses three open-ended questions were grouped...

Background: This study aimed to examine the dose-response relationship between training load and aspects of physical fitness in English Premier League (EPL) U23 soccer players. Materials Methods: Seven male EPL outfield players (age 20.1±1.1 years) participated this performed Bronco test on five occasions within one season. Individualised running thresholds were employed using maximal aerobic speed (MAS), anaerobic reserve (ASR) sprint (MSS) values utilising a GPS system. Results: No...

Purpose : Investigate the concurrent agreement and test–retest reliability of 10-Hz global-positioning-system (GPS) device against a criterion measure (47-Hz radar device) to assess maximal horizontal deceleration ability (maximum [DEC Max ], average Ave time stop, distance stop). Methods Thirty-two male elite youth academy soccer players (age 18.1 [1.6] y, body mass 76.6 [7.9] kg) completed acceleration–deceleration test with 16 completing second reliability. Maximal was measured...

This investigation aimed to determine the countermovement jump (CMJ) neuromuscular performance (NMP) qualities that differentiate between athletes with high or low horizontal deceleration ability. Twenty-seven male university team sport performed a CMJ on vertical axis force plates and maximal following 20 m sprint acceleration. The instantaneous velocity throughout test was measured using radar device. ability evaluated average (HDEC, m·s−2) change in momentum—referred as braking impulse...

Previous research has highlighted the frequency of high-intensity accelerations and decelerations in elite football. The influence these actions on match performance outcomes not been established. aim present study was to identify (i.e., win, draw, lost). Comparisons were also made between team positional recorded within games.26 outfield footballers from an English Football League (EFL) Two completed study. Global Positioning System (GPS) technology utilised quantify during 45 games a...

This study explored physical match demands across different playing positions during transitional play, to inform the need for position-specific training interventions. Data was collected using 10 Hz GPS units from competitive matches including 23 elite soccer players of 1

To examine the interday reliability and usefulness of a reactive strength index (RSI) derived from maximal 5-rebound jump test (5max RJT) 10-rebound (10/5 RJT).Twenty male field-sport athletes (24.5 [3.0] y, 1.78 [0.1] m, 84.9 [5.2] kg) 15 female participants (21.1 [0.9] 1.65 [0.73] 62.0 [5.1] performed 2 repetitions 5max RJT 10/5 on testing days after specific warm-up. A 1-wk period separated days, these sessions were preceded by familiarization session. RSI was calculated dividing height...

This randomised controlled trial investigated changes in eccentric hamstring strength, 10m sprint speed, and change-of-direction (COD) performance immediately post Nordic curl (NHC) intervention following a 3-week detraining period. Fourteen male team sports athletes were to do-as-usual control group (CG; n = 7) or NHC (NHC; 7). Isokinetic dynamometry at 180°/s evaluated strength post-intervention as the primary outcome measure. Secondary outcomes included 10 m time COD. Each was measured,...

ABSTRACT Attacking agility actions, such as side steps, shuffle crossover cutting, split spins, decelerations, and sharp turns, are important maneuvers in invasion team sports, often linked with decisive match winning moments. Generally, the aims of these actions to (a) evade create separation from an opponent, (b) generate high exit velocities momentums, or (c) facilitate a redirection. However, also inciting movements associated lower-limb injury. Given importance for sports performance...

Abstract Background There are a myriad of exercise variations in which upper body (UB) and lower (LB) exercises have been intermittently used. However, it is still unclear how training one region (e.g. LB) affects adaptations distant areas UB), different UB LB configurations could help facilitate physiological either region; both referred to this review as vertical strength transfer. Objective We aimed investigate the existence transfer phenomenon response various identify potential...

The purpose of this study was to investigate associations between, and within, drop jump (DJ) neuromuscular performance (NMP) qualities maximal horizontal deceleration ability. We also compared DJ NMP in "high" versus "low" ability athletes. Twenty-nine university athletes performed: (1) DJs on force plates from 20 (DJ20) 40 cm (DJ40) heights (2) deceleration, measured using radar, following a m acceleration. Maximal evaluated (HDEC; m·s-2), across the entire phase during early late...

The aim of this study was to determine validity velocity measurements a motorized resistance device (MRD) during change direction (CoD). Eight male (age: 22.1 ± 4.2 yrs; weight: 83.3 17.1 kg; height: 181.6 12.6 cm) and three female participants 21.7 1.5 mass: 69.7 2.4 167.0 3.6 completed the modified 505 CoD test (m505) with turning off left right foot while exposed external loads (3, 6, 9 kg) provided by MRD. Three-dimensional kinematic data were measured (200 Hz) for all tests using...