Application and interpretation of the yo-yo intermittent recovery test to the long-term physical development of girls association football players

Alison Innerd, Matthew Wright

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We aimed examine yo-yo intermittent recovery test, level 1 (YYIRL1)
performance in girls football players. Mixed-linear modelling was used to
determine within-season changes in YYIRL1 performance and between and
within- player variation over four years, at four time points (July,
September, December and May) in 86 players (474 observations).
Twenty-three players, tested over three consecutive years were retained
for further analysis. Magnitude-based inferences were used to quantify
annual change in performance on a group and individual level. Within player
correlations were used to determine the association between
YYIRL1 and maturation. ‘Very likely’ small (14, ±90% confidence interval
8.1 – 20%) improvements were observed between July and September
and ‘possibly’ trivial (5.5, 0.41 to 11%) differences between September
and May. Within-player variation throughout the in-season period,
representing the typical error of the estimate was 23%, 22 – 25% and
between-player, 38, 33 – 44%. We observed ‘most likely’ moderate
improvements (32, 17 to 49%) over three years that were moderately
associated with changes in maturation (r = 0.46, 0.13 to 0.70). A
minimum change of ≥44% is required to detect ‘likely’ improvements in
YYIRL1 performance on an individual basis. Girls football players appear
responsive to pre-season training and to long-term exposure to
systematic training.
Original languageEnglish
JournalScience and Medicine in Football
Publication statusAccepted/In press - 7 Apr 2019

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@article{aa12ca73df01433d96a83ec827394644,
title = "Application and interpretation of the yo-yo intermittent recovery test to the long-term physical development of girls association football players",
abstract = "We aimed examine yo-yo intermittent recovery test, level 1 (YYIRL1)performance in girls football players. Mixed-linear modelling was used todetermine within-season changes in YYIRL1 performance and between andwithin- player variation over four years, at four time points (July,September, December and May) in 86 players (474 observations).Twenty-three players, tested over three consecutive years were retainedfor further analysis. Magnitude-based inferences were used to quantifyannual change in performance on a group and individual level. Within playercorrelations were used to determine the association betweenYYIRL1 and maturation. ‘Very likely’ small (14, ±90{\%} confidence interval8.1 – 20{\%}) improvements were observed between July and Septemberand ‘possibly’ trivial (5.5, 0.41 to 11{\%}) differences between Septemberand May. Within-player variation throughout the in-season period,representing the typical error of the estimate was 23{\%}, 22 – 25{\%} andbetween-player, 38, 33 – 44{\%}. We observed ‘most likely’ moderateimprovements (32, 17 to 49{\%}) over three years that were moderatelyassociated with changes in maturation (r = 0.46, 0.13 to 0.70). Aminimum change of ≥44{\%} is required to detect ‘likely’ improvements inYYIRL1 performance on an individual basis. Girls football players appearresponsive to pre-season training and to long-term exposure tosystematic training.",
author = "Alison Innerd and Matthew Wright",
year = "2019",
month = "4",
day = "7",
language = "English",
journal = "Science and Medicine in Football",
issn = "2473-3938",
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TY - JOUR

T1 - Application and interpretation of the yo-yo intermittent recovery test to the long-term physical development of girls association football players

AU - Innerd, Alison

AU - Wright, Matthew

PY - 2019/4/7

Y1 - 2019/4/7

N2 - We aimed examine yo-yo intermittent recovery test, level 1 (YYIRL1)performance in girls football players. Mixed-linear modelling was used todetermine within-season changes in YYIRL1 performance and between andwithin- player variation over four years, at four time points (July,September, December and May) in 86 players (474 observations).Twenty-three players, tested over three consecutive years were retainedfor further analysis. Magnitude-based inferences were used to quantifyannual change in performance on a group and individual level. Within playercorrelations were used to determine the association betweenYYIRL1 and maturation. ‘Very likely’ small (14, ±90% confidence interval8.1 – 20%) improvements were observed between July and Septemberand ‘possibly’ trivial (5.5, 0.41 to 11%) differences between Septemberand May. Within-player variation throughout the in-season period,representing the typical error of the estimate was 23%, 22 – 25% andbetween-player, 38, 33 – 44%. We observed ‘most likely’ moderateimprovements (32, 17 to 49%) over three years that were moderatelyassociated with changes in maturation (r = 0.46, 0.13 to 0.70). Aminimum change of ≥44% is required to detect ‘likely’ improvements inYYIRL1 performance on an individual basis. Girls football players appearresponsive to pre-season training and to long-term exposure tosystematic training.

AB - We aimed examine yo-yo intermittent recovery test, level 1 (YYIRL1)performance in girls football players. Mixed-linear modelling was used todetermine within-season changes in YYIRL1 performance and between andwithin- player variation over four years, at four time points (July,September, December and May) in 86 players (474 observations).Twenty-three players, tested over three consecutive years were retainedfor further analysis. Magnitude-based inferences were used to quantifyannual change in performance on a group and individual level. Within playercorrelations were used to determine the association betweenYYIRL1 and maturation. ‘Very likely’ small (14, ±90% confidence interval8.1 – 20%) improvements were observed between July and Septemberand ‘possibly’ trivial (5.5, 0.41 to 11%) differences between Septemberand May. Within-player variation throughout the in-season period,representing the typical error of the estimate was 23%, 22 – 25% andbetween-player, 38, 33 – 44%. We observed ‘most likely’ moderateimprovements (32, 17 to 49%) over three years that were moderatelyassociated with changes in maturation (r = 0.46, 0.13 to 0.70). Aminimum change of ≥44% is required to detect ‘likely’ improvements inYYIRL1 performance on an individual basis. Girls football players appearresponsive to pre-season training and to long-term exposure tosystematic training.

M3 - Article

JO - Science and Medicine in Football

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SN - 2473-3938

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