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Acute and chronic workload ratios of perceived exertion, global positioning system, and running-based variables between starters and non-starters: a male professional team study
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Advisor(s)
Abstract(s)
The study aim was 2-fold (i) to describe and compare the in-season variations of acute:
chronic workload ratio (ACWR) coupled, ACWR uncoupled, and exponentially weighted
moving average (EWMA) through session-rated perceived exertion (s-RPE), total distance
(TD), high-speed running distance (HSRD), and sprint distance across different periods
of a professional soccer season (early, mid, and end-season) between starters and
non-starters; (ii) to analyze the relationship the aforementioned measures across different
periods of the season for starters and non-starters. Twenty elite soccer players (mean±SD
age, 29.4±4.4 y; height, 1.8±0.1m; and body mass, 74.8±2.3kg). They were divided
into starter and non-starter groups and were evaluated for 20weeks. ACWR had general
changes throughout the season. At the beginning and end of the mid-season, the highest
ACWR was observed in three parameters: s-RPE, TD, and HSRD. ACWR and EWMA
through sprint distance were higher at the beginning of the early-season than at any other
time of the season.
The ACWR coupled of s-RPE shows a significant higher value for non-starters than starters
(p=0.015; g=−1.01 [−1.98, −0.09]) and the ACWR coupled of TD shows a significant
higher value for starters than non-starters in early-season (p<0.01; g=3.01 [1.78, 4.46])
and shows a significant higher value for non-starters than starters in mid-season (p<0.01;
g=−2.52 [−3.83, −1.39]), and end-season (p<0.01; g=−2.57 [−3.89, −1.43]). While
the EWMA of TD shows a significant higher value for starters than non-starters in early season (p<0.01; g=2.25 [1.17, 3.49]) and mid-season (p<0.01; g=2.42 [1.31, 3.71]),
and shows a significant higher value for non-starters than starters in end-season (p<0.01;
g=−2.23 [−3.47, −1.16]). Additionally, we found some correlations between external and
internal load measures during three periods of the in-season. The study’s main finding
was that the indexes of ACWR and EWMA were useful to detect differences between
period and between playing status with the exception for the sprint variable. In addition,
the necessary work for non-starter players’ improvement is not done during training, and
these players lose their readiness as the season progresses. Consequently, these players
perform poorly during the match. Therefore, coaches and their staff should consider
devising new activities to keep non-starter players physically fit. This deficit must
be accounted for in training because they compete in fewer matches and have less burden
than starters.
Description
Keywords
ACWR EWMA coupled uncoupled GPS high speed RPE player status
Citation
Nobari H, Alijanpour N, Martins AD and Oliveira R (2022). Acute and Chronic Workload Ratios of Perceived Exertion, Global Positioning System, and Running-Based Variables Between Starters and Non-starters: A Male Professional Team Study. Front. Psychol. 13:860888. doi: 10.3389/fpsyg.2022.860888
Publisher
Frontiers