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Comparisons of accelerometer variables acute, chronic and acute/chronic workload ratio between starters and non-starters: A full-season study in professional soccer players.
- Source :
-
Science & Sports . Apr2022, Vol. 37 Issue 2, p149.e1-149.e12. 1p. - Publication Year :
- 2022
-
Abstract
- Monitoring training workload via accelerometer-derived microsensors has been used extensively in professional team sports. However, a comparison of training states between starters and non-starts professional players in an entire season has not been fully investigated. The aim of this study was to examine to compare the workload parameters (i.e. the acute, chronic, acute/chronic workload ratio, metabolic power average, acceleration, and deceleration) between starters and non-starters players in four different periods of professional football season. This study followed a retrospective and longitudinal design. Twenty-one Iranian professional soccer players (age, 28.27 ± 3.78 years; height, 181.23 ± 7.08 cm; body mass, 74.45 ± 7.72 kg) completed an entire season in 2018–2019 and participated in this study. A wearable device with a tri-axial accelerometer (SPI HPU, GPSports systems) was used to monitor the locomotor profile during training sessions and matches over a forty-eight-weeks season (pre-season = week 1–5; early-season = week 6–19; mid-season = week 20–34; end-season = week 35–48). Body load was used to calculate acute (7 days), chronic workload (previous 3 weeks), and acute/chronic workload ratio. The metabolic power average, acceleration, and deceleration patterns were also calculated weekly. The starters exposed larger accumulation of acute and chronic workload in the mid-season (p = 0.008, d = −1.24; p = 0.006; d = −1.31) and end-season (p = 0.001, d = −1.66; p = 0.001; d = −1.62), respectively. The metabolic power average, acceleration, and deceleration were remarkably high in starters over all periods of the season (P > 0.05), excepted high-intensity deceleration zone for preseason (> −4 m/s2; p = 0.149). Starters accumulated large exposure of acute and chronic workload and high-intensity of locomotor characteristics over a full professional football season. Consideration to balance the deficiency of weekly workloads between line-up players and substitutes/reserve players is essential to establish beneficial approach of team square. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOCCER players
*SOCCER teams
*ACCELEROMETERS
*BODY mass index
*WEARABLE technology
Subjects
Details
- Language :
- English
- ISSN :
- 07651597
- Volume :
- 37
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Science & Sports
- Publication Type :
- Academic Journal
- Accession number :
- 156629566
- Full Text :
- https://doi.org/10.1016/j.scispo.2021.03.011