bioRxiv preprint doi: https://doi.org/10.1101/2020.05.24.113191; this version posted May 27, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 Bowled over or over bowled? Age-related changes in the 2 performance of bowlers in Test match cricket 3 Running title: Age-related performance of Test match bowlers 4 Jack Thorley1 5 1 Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, 6 UK 7 Corresponding author: Jack Thorley (
[email protected]) 8 ORCID 9 Jack Thorley 0000-0002-8426-610X 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.05.24.113191; this version posted May 27, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 10 ABSTRACT 11 Data from elite professional sports players provide a valuable source of information on 12 human performance and ageing. Functional declines in performance have been investigated 13 across a wide range of sporting disciplines that vary in their need for physical strength, 14 endurance, cognitive ability and motor skills, but rarely have researchers considered other 15 sources of heterogeneity that can exist among individuals. Using information on all male 16 bowlers to have played Test match cricket since the early 1970s, I separated age-dependent 17 variation in bowling performance at the population-level into within-individual and between- 18 individual (cohort) changes.