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    Modelling changes in bone and body composition over a season in elite male footballers

    Varley, Ian, Ward, Marcus, Thorpe, Chris, Beardsley, Nathan, Greeves, Julie, Sale, Craig ORCID logoORCID: https://orcid.org/0000-0002-5816-4169 and Saward, Chris (2022) Modelling changes in bone and body composition over a season in elite male footballers. International Journal of Sports Medicine, 43 (8). pp. 729-739. ISSN 0172-4622

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    Abstract

    This study investigated the change in bone and body composition characteristics of elite football players and recreationally active control participants across the course of a season. Fortysix participants (20 footballers and 26 recreationally active controls) were assessed by dual-energy x-ray absorptiometry and peripheral Quantitative Computed Tomography for a range of bone and body composition characteristics at four points over the course of a competitive season. Multilevel modelling was used to examine changes. Footballers had higher characteristics than controls for 24 out of 29 dual-energy x-ray absorptiometry and peripheral Quantitative Computed Tomography variables (all p<0.05). However, there was also significant random inter-individual variation in baseline values for all variables, for both footballers and controls (p < 0.05). Wholebody bone mineral density, leg and whole-body bone mineral content, tibial bone mass and area (38%) increased across the season in footballers (p < 0.05), and there was significant random inter-individual variation in the rate of increase of leg and whole-body bone mineral content (p<0.05). Whole-body bone mineral density, leg and whole-body bone mineral content, tibial bone mass and area (38%) increased over the course of the season in elite football players. The modelling information on expected changes in bone characteristics provides practitioners with a method of identifying those with abnormal bone response to football training and match-play.

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