Results 11 to 20 of about 169,052,029 (285)

Effectiveness of small-sided games on change of direction speed in youth soccer players: a systematic review and meta-analysis

open access: yesHuman Movement
Purpose Football requires both linear movements and directional changes, crucial for performance. This systematic review and meta-analysis evaluate small-sided games (SSGs) versus other training methods for enhancing change of direction speed in young ...
Ioan Neag   +8 more
doaj   +2 more sources

Change of direction ability test differentiates higher level and lower level soccer referees [PDF]

open access: yesBiology of Sport, 2016
This report examines the agility and level of acceleration capacity of Spanish soccer referees and investigates the possible differences between field referees of different categories.
J Yanci   +3 more
doaj   +2 more sources

Direct and Indirect Effects Based on Changes-in-Changes [PDF]

open access: yesSSRN Electronic Journal, 2019
We propose a novel approach for causal mediation analysis based on changes-in-changes assumptions restricting unobserved heterogeneity over time. This allows disentangling the causal effect of a binary treatment on a continuous outcome into an indirect effect operating through a binary intermediate variable (called mediator) and a direct effect running
Martin Huber   +2 more
openaire   +6 more sources

Change of Direction in the Biomechanics of Atherosclerosis [PDF]

open access: yesAnnals of Biomedical Engineering, 2014
The non-uniform distribution of atherosclerosis within the arterial system has been attributed to pro-atherogenic influences of low, oscillatory haemodynamic wall shear stress (WSS) on endothelial cells (EC). This theory is challenged by the changes in lesion location that occur with age in human and rabbit aortas.
Mohamied, Yumnah   +5 more
openaire   +4 more sources

The Environment and Directed Technical Change [PDF]

open access: yesSSRN Electronic Journal, 2009
This paper introduces endogenous and directed technical change in a growth model with environmental constraints. The final good is produced from “dirty” and “clean” inputs. We show that: (i) when inputs are sufficiently substitutable, sustainable growth can be achieved with temporary taxes/subsidies that redirect innovation toward clean inputs; (ii ...
Acemoglu, Daron   +3 more
openaire   +12 more sources

Changing Direction on Direction of Fit [PDF]

open access: yesEthical Theory and Moral Practice, 2012
In this paper, I show that we should understand the direction of fit of beliefs and desires in normative terms. After rehearsing a standard objection to Michael Smith’s analysis of direction of fit, I raise a similar problem for Lloyd Humberstone’s analysis.
openaire   +2 more sources

Directed Technical Change [PDF]

open access: yesReview of Economic Studies, 2002
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

The influence of age and sex on speed–strength performance in children between 10 and 14 years of age

open access: yesFrontiers in Physiology, 2023
Introduction: Speed-strength performance is important during human movements such as jumping, sprinting, and change of direction (COD) tasks, which are a substantial part of sports practice.
Konstantin Warneke   +6 more
doaj   +1 more source

Hydrodynamics and direction change of tumbling bacteria.

open access: yesPLoS ONE, 2021
The bacterium Escherichia coli (E. coli) swims in viscous fluids by rotating several helical flagellar filaments, which are gathered in a bundle behind the cell during 'runs' wherein the cell moves steadily forward.
Mariia Dvoriashyna, Eric Lauga
doaj   +1 more source

Comparison of Change of Direction Speed Performance and Asymmetries between Team-Sport Athletes: Application of Change of Direction Deficit

open access: yesSports, 2018
The purpose of this study was twofold: (1) to examine differences in change of direction (COD) performance and asymmetries between team-sports while considering the effects of sex and sport; (2) to evaluate the relationship between linear speed, COD ...
Thomas Dos’Santos   +3 more
doaj   +1 more source

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