@article{ref1,
title="How early should you brake during a 180° turn? A kinetic comparison of the antepenultimate, penultimate, and final foot contacts during a 505 change of  direction speed test",
journal="Journal of sports sciences",
year="2020",
author="Dos'Santos, Thomas and Thomas, Christopher and Jones, Paul A.",
volume="ePub",
number="ePub",
pages="ePub-ePub",
abstract="The aim of the study was to compare ground reaction force (GRF) characteristics between the antepenultimate foot contact (APFC), penultimate foot contact (PFC), and  final foot contact (FFC), and to examine the relationships between APFC, PFC, and  FFC GRF characteristics with 505 change of direction (COD) speed performance. Twenty  university male soccer players performed three COD trials, whereby GRFs were  collected over the aforementioned foot contacts. Greater peak braking forces in  shorter ground contact times were demonstrated over the APFC compared to the PFC and  FFC (p ≤ 0.011, d = 0.96-7.82), while APFC mean GRFs were greater than the PFC (p  ≤ 0.001, d = 1.86-7.57). Faster 505 performance was associated with greater APFC  peak and mean vertical, horizontal, and resultant braking GRFs (r(2) = 21.6-54.5%),  greater FFC mean HGRFs (r(2) = 38.8%), more horizontally orientated peak resultant  APFC and PFC GRFs (r(2) = 22.8-55.4%), and greater APFC, PFC, and FFC mean  horizontal to vertical GRF ratios (r(2) = 32.0-61.9%). Overall, the APFC plays a  more pivotal role in facilitating deceleration compared to the PFC for effective 505  performance. Practitioners should develop their athletes' technical ability to  express force horizontally across all foot contacts and coach braking strategies  that emphasise greater magnitudes of posteriorly directed APFC GRFs to facilitate  faster 505 performance.<p /> <p>Language: en</p>",
language="en",
issn="0264-0414",
doi="10.1080/02640414.2020.1823130",
url="http://dx.doi.org/10.1080/02640414.2020.1823130"
}