15–16 year old female basketball, volleyball and soccer players’ vertical movement characteristics

This paper examined effects of sports practice on patterns of color fields, limits of peripheral movement perception, and visual acuity field by comparing varsity ball players and non-varsity control groups. The first study measured extent of color fields and limits of horizontal and vertical meridians for peripheral movement perception of 139 college students. The second study tested visual acuity fields of female and male basketball players and female and male controls. The first study indicated that athletes had wider limits for horizontal movement perception, while the non-athletes had better vertical movement perception limits. Basketball players demonstrated color fields and limits for peripheral movement perception superior to those of soccer players. In the second study, athletes did not have any wider visual acuity fields than non-athletes, but their movement-perception limits were significantly wider than those of non-athletes.

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Biomechanical Characteristics for Identifying the Cutting Direction of Professional Soccer Players

Applied Sciences ◽

10.3390/app11167193 ◽

2021 ◽

Vol 11 (16) ◽

pp. 7193

Author(s):

Yo Chen ◽

Tang-Yun Lo ◽

Fei Xu ◽

Jia-Hao Chang

Keyword(s):

Lower Limbs ◽

Biomechanical Analysis ◽

Soccer Players ◽

Professional Soccer ◽

Movement Characteristics ◽

Left And Right ◽

Run Up ◽

Analysis System ◽

The Right ◽

Cutting Direction

(1) Background: To understand the movement characteristics of soccer players when cutting in two directions (45° for the right and left cutting movements) through biomechanical analysis of the lower limbs to identify the cutting direction of the attacker; (2) Methods: A motion analysis system was used to capture the movements of 12 male professional soccer players dribbling to the left and right. Kinematics of the players’ cutting were analyzed, and the paired t-test was used for statistics, with a significant level of α = 0.05; (3) Results: When cutting towards the right, the height of the hip joint during the run-up was low (effect size, ES = 0.41, p = 0.031) at 91.8 ± 7.0 cm. When cutting towards the left, the value was 94.6 ± 6.7 cm. While cutting, the front foot was abducted by 4.3 ± 4.0° at landing when cutting towards the right and adducted by 2.7 ± 5.1° when cutting towards the left (ES = 0.38, p = 0.003); (4) Conclusions: When the attacker carries out the cutting action while approaching the defender, the cutting direction may be predicted by observing the attacker’s hip and foot movements.

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The Effect on the Stability of Rear Drive Vehicle with Viscous Limited Slip Differential

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.716-717.730 ◽

2014 ◽

Vol 716-717 ◽

pp. 730-734

Author(s):

Li Qiang Jin ◽

Ze Wei Wang ◽

Dong Xu Yin

Keyword(s):

Vertical Movement ◽

Longitudinal Motion ◽

Lateral Movement ◽

Unequal Distribution ◽

Movement Characteristics ◽

Dynamic Simulation Model ◽

Vehicle Dynamic Simulation ◽

Motion Characteristics ◽

The Stability ◽

Dynamics Stability

This article reflects the influence on the limited slip differential (LSD) for the rear drive vehicle handling and stability through the process of stress analysis of automotive steering movement, where the vehicle dynamic simulation model including the LSD system is established, and it also has the analysis of the effects on the LSD for vehicle dynamics stability. Viscous Limited Slip Differential (VLSD) has influences on the motion characteristics of the vehicle in many aspects, including vertical movement and lateral movement that is most remarkable. It is obvious to improve the dynamic property and trafficability by it on the bad road for cars in longitudinal motion, but at the same time it also produce a great impact on the lateral movement characteristics of the automobile because of the unequal distribution of vehicle driving force.

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Neotectonic Movement of the Northern East China Sea Shelf Basin

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.137.316 ◽

2011 ◽

Vol 137 ◽

pp. 316-321 ◽

Cited By ~ 1

Author(s):

Fang Hui Hou ◽

San Zhong Li ◽

Zhi Xun Zhang

Keyword(s):

East China Sea ◽

Active Faults ◽

Vertical Movement ◽

East China ◽

Single Track ◽

Seismic Profiles ◽

China Sea ◽

Neotectonic Movement ◽

Movement Characteristics ◽

East China Sea Shelf

On the base of comprehensive analysis of some new single-track seismic profiles and logging data, the neotectonic movement characteristics of the northern East China Sea Shelf Basin are researched. In the study area, there are intensive neotectonic movement. The main manifestations of the neotectonics include vertical movement, fracture activity and magma activity. The research indicate that the sedimentation centers shift from west to east since Miocene. NE-NNE-striking fault and EW-striking fault are the main active faults. The activity of these faults are gradually later from west to east. The magma activity are frequent and can be divided into three phases in the neotectonic period . They are mainly distribute along active faults. From west to east, the magma activity phases are gradually later. The intrusion gradually weaken and eruption gradually strengthen.

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The effect of bio-banding on the anthropometric, physical fitness and functional movement characteristics of academy soccer players

PLoS ONE ◽

10.1371/journal.pone.0260136 ◽

2021 ◽

Vol 16 (11) ◽

pp. e0260136

Author(s):

Calum MacMaster ◽

Matt Portas ◽

Guy Parkin ◽

Sean Cumming ◽

Chris Wilcox ◽

...

Keyword(s):

Physical Fitness ◽

Threshold Value ◽

Soccer Players ◽

Anthropometric Data ◽

Functional Movement ◽

Biological Growth ◽

Professional Soccer ◽

Movement Characteristics ◽

Effect Hypothesis ◽

Competitive Equity

The study examined if maturity status bio-banding reduces within-group variance in anthropometric, physical fitness and functional movement characteristics of 319, under-14 and under-15 players from 19 UK professional soccer academies. Bio-banding reduced the within-bio-banded group variance for anthropometric values, when compared to an aggregated chronological banded group (chronological: 5.1–16.7%CV; bio-banded: 3.0–17.3%CV). Differences between these bio-banded groups ranged from moderate to very large (ES = 0.97 to 2.88). Physical performance variance (chronological: 4.8–24.9%CV; bio-banded: 3.8–26.5%CV) was also reduced with bio-banding compared to chronological aged grouping. However, not to the same extent as anthropometric values with only 68.3% of values reduced across banding methods compared to 92.6% for anthropometric data. Differences between the bio-banded groups physical qualities ranged from trivial to very large (ES = 0.00 to 3.00). The number of functional movement metrics and %CV reduced by bio-banding was lowest within the ‘circa-PHV’ groups (11.1–44.4%). The proportion of players achieving the threshold value score of ≥ 14 for the FMS™ was highest within the ‘post-PHV’ group (50.0–53.7%). The use of maturity status bio-banding can create more homogenous groups which may encourage greater competitive equity. However, findings here support a bio-banding maturity effect hypothesis, whereby maturity status bio-banding has a heightened effect on controlling for characteristics which have a stronger association to biological growth.

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