ABSTRACT THE ISOMETRIC MIDTHIGH PULL (IMTP) IS COMMONLY USED TO ASSESS AN ATHLETE'S FORCE GENERATION ABILITY. THIS TEST HIGHLY RELIABLE AND SIMPLE RELATIVELY QUICK PERFORM. DATA THAT CAN BE DETERMINED FROM FORCE–TIME CURVES GENERATED BY HAVE BEEN SHOWN CLOSELY RELATED PERFORMANCE CAPACITIES IN A VARIETY OF DYNAMIC ATHLETIC TASKS. HOWEVER, WITHIN SCIENTIFIC LITERATURE, THERE ARE INCONSISTENCIES COLLECTION PROCEDURES METHODS FOR ANALYSIS MAY IMPACT RESULTANT OUTPUT ABILITY COMPARE GENERALIZE...

Abstract Dos'Santos, T, Thomas, C, Jones, PA, and Comfort, P. Mechanical determinants of faster change direction speed performance in male athletes. J Strength Cond Res 31(3): 696–705, 2017—Mechanical variables during directions, for example, braking propulsive forces, impulses, ground contact times (GCT) have been identified as (CODS) performance. The purpose this study was to investigate the mechanical 180° CODS with characteristic comparisons between slower performers; while exploring...

Previous studies have reported an association between eccentric strength (ECC-STR) and change of direction (COD) ability. Little is known about how ECC-STR facilitates COD maneuvers. The aim this study was to examine the role during a 180° task in 18 female soccer players. Each player performed six trials whereby three-dimensional motion data from 10 Qualisys Pro-Reflex infrared cameras (240 Hz) ground reaction forces (GRFs) two AMTI force platforms (1200 were collected. Relative knee...

Dos'Santos, T, Jones, PA, Comfort, P, and Thomas, C. Effect of different onset thresholds on isometric midthigh pull force-time variables. J Strength Cond Res 31(12): 3463-3473, 2017-Various have been used to identify the contraction during (IMTP); however, no agreed threshold exists for this assessment. The purpose study was compare relative body weight (BW) arbitrary a criterion 5 SDs BW IMTP variables; force at each threshold, peak force, time-specific values (100, 150, 200 ms), rate...

Abstract Dos'Santos, T, Thomas, C, Jones, PA, and Comfort, P. Assessing asymmetries in change of direction speed performance; application deficit. J Strength Cond Res 33(11): 2953–2961, 2019—The aims this study were to quantify (COD) performance using completion time COD deficit, determine its influence on asymmetry profiling ability. A secondary aim was evaluate the relationship between linear speed, 505 time, Forty-three youth netball athletes (age: 15.4 ± 1.1 years, height: 1.71 0.06 m,...

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...

Most cutting biomechanical studies investigate performance and knee joint load determinants independently. This is surprising because an important action linked to non-contact anterior cruciate ligament (ACL) injuries. The aim of this study was the relationship between biomechanics (completion time, ground contact time [GCT], exit velocity) surrogates ACL injury risk (knee abduction [KAM] internal rotation [KIRM] moments) during 90° cutting.Mixed, cross-sectional following associative...

Background: Qualitative movement screening tools provide a practical method of assessing mechanical patterns associated with potential injury development. Biomechanics play role in hamstring strain and are recommended as consideration within rehabilitation programs. However, no methods available for the in-field assessment sprint running mechanics injuries. Purpose: To investigate intra- interrater reliability novel tool titled Sprint Mechanics Assessment Score (S-MAS) present normative...

Objectives: To determine the impact of between limb asymmetries in hop performance on change direction speed (CODS). Design and Methods: Twenty-two multisport collegiate athletes (mean ± SD; age: 21.8 3.4 years, height: 178.1 6.7 cm, mass: 73.5 7.1kg) performed three single triple horizontal hops for distance per limb, followed by modified 505 90˚cut CODS trials each side to establish imbalances right left, dominant (D) non-dominant (ND) limbs. Limb dominance was defined as that produced...

Abstract Dos'Santos, T, McBurnie, A, Thomas, C, Comfort, P, and Jones, PA. Biomechanical determinants of the modified traditional 505 change direction speed test. J Strength Cond Res 34(5): 1285–1296, 2020—The aim this study was to investigate whole-body biomechanical 180° (COD) performance. Sixty-one male athletes (age: 20.7 ± 3.8 years, height: 1.77 0.06 m, mass: 74.7 10.0 kg) from multiple sports (soccer, rugby, cricket) completed 6 trials on their right leg, whereby 3D motion ground...

Cutting manoeuvres are important actions associated with soccer performance and a key action non-contact anterior cruciate ligament injury; thus, training interventions that can improve cutting movement quality of great interest. The aim this study, therefore, was to determine the effects six-week change dire[ction (COD) speed technique modification intervention on in male youth players (U17s, n = 8) comparison control group (CG) (U18s, 11) who continued 'normal' training. assessed based...

Purpose: To investigate the within-session reliability of bilateral- and unilateral-stance isometric midthigh-pull (IMTP) force–time characteristics including peak force (PF), relative PF, impulse at time bands (0–100, 0–200, 0–250, 0–300 milliseconds) to compare between right left dominant (D) nondominant (ND) limbs. Methods: Professional male rugby league multisport college athletes (N = 54; age, 23.4 ± 4.2 y; height, 1.80 0.05 m; mass, 88.9 12.9 kg) performed 3 bilateral IMTP trials 6 (3...

The purpose of this study was twofold: (1) to examine differences in change direction (COD) performance and asymmetries between team-sports while considering the effects sex sport; (2) evaluate relationship linear speed, COD completion time, deficit. A total 115 (56 males, 59 females) athletes active cricket, soccer, netball, basketball performed 505 for both left right limbs a 10-m sprint test. All displayed directional dominance (i.e., faster turning performance/shorter deficits towards...

ABSTRACT MOST CHANGE OF DIRECTION BIOMECHANICAL INVESTIGATIONS AND CURRENT TECHNIQUE GUIDELINES FOCUS ON THE ROLE FINAL FOOT CONTACT. HOWEVER, IT IS EVIDENT THAT PENULTIMATE CONTACT BRAKING CHARACTERISTICS PLAY AN INTEGRAL IN DECELERATION BEFORE DIRECTIONAL CHANGES ≥60°; CAN THEREFORE, BE DESCRIBED AS A “PREPARATORY STEP.” THIS REVIEW, WE EXAMINE PERFORMANCE INJURY RISK FACTORS, PROVIDE TECHNICAL FOR COACHING STEP” DURING DIRECTION, TO ENHANCE REDUCE INJURY. VIDEO DESCRIBING ARTICLE FOUND...

To investigate the relationships between maximal isometric strength, vertical jump (VJ), sprint speed, and change-of-direction speed (CoDS) in academy netball players determine whether who have high performance strength testing would demonstrate superior VJ, CoDS measures.Twenty-six young female (age 16.1 ± 1.2 y, height 173.9 5.7 cm, body mass 66.0 7.2 kg) from a regional performed midthigh pull (IMTP), squat jumps (SJs), countermovement (CMJs), 10-m sprints, (505).IMTP measures displayed...

Abstract Dos'Santos, T, Thomas, C, Comfort, P, McMahon, JJ, Jones, PA, Oakley, NP, and Young, AL. Between-session reliability of isometric midthigh pull kinetics maximal power clean performance in male youth soccer players. J Strength Cond Res 32(12): 3373–3381, 2018—The aim the study was to determine between-session (IMTP) weight lifted during (PC) players, identify smallest detectable differences between sessions. Thirteen players (age: 16.7 ± 0.5 years, height: 1.80 0.08 m, mass: 70.5 9.4...