期刊
JOURNAL OF SPORTS SCIENCES
卷 38, 期 14, 页码 1674-1681出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02640414.2020.1754725
关键词
Training load; principal component analysis; time series; rugby
This study examined the relative contribution of exercise duration and intensity to team-sport athlete's training load. Male, professional rugby league (n = 10) and union (n = 22) players were monitored over 6- and 52-week training periods, respectively. Whole-session (load) and per-minute (intensity) metrics were monitored (league: session rating of perceived exertion training load [sRPE-TL], individualised training impulse, total distance, BodyLoad (TM); union: sRPE-TL, total distance, high-speed running distance, PlayerLoad (TM)). Separate principal component analyses were conducted on the load and intensity measures to consolidate raw data into principal components (PC, k = 4). The first load PC captured 70% and 74% of the total variance in the rugby league and rugby union datasets, respectively. Multiple linear regression subsequently revealed that session duration explained 73% and 57% of the variance in first load PC, respectively, while the four intensity PCs explained an additional 24% and 34%, respectively. Across two professional rugby training programmes, the majority of the variability in training load measures was explained by session duration (60-70%), while a smaller proportion was explained by session intensity (30%). When modelling the training load, training intensity and duration should be disaggregated to better account for their between-session variability.
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