@article { , title = {The relative contribution of training intensity and duration to daily measures of training load in professional rugby league and union}, abstract = {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™; union: sRPE-TL, total distance, high-speed running distance, PlayerLoad™). 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.}, doi = {10.1080/02640414.2020.1754725}, eissn = {1466-447X}, issn = {0264-0414}, issue = {14}, journal = {Journal of Sports Sciences}, pages = {1674-1681}, publicationstatus = {Published}, publisher = {Taylor and Francis}, url = {https://hull-repository.worktribe.com/output/3480913}, volume = {38}, keyword = {Health and Health Inequalities, Training load, Principal component analysis, Time series, Rugby}, year = {2020}, author = {Weaving, Dan and Dalton-Barron, Nicholas and McLaren, Shaun and Scantlebury, Sean and Cummins, Cloe and Roe, Gregory and Jones, Ben and Beggs, Clive and Abt, Grant} }