Exeter University researchers are looking for young male cyclists for a study on how body composition is affected by sport.
The team are investigating what effect exercise has on the development of bones in young boys.
They're seeking boys aged 12 to 14 who've cycled for three hours a week or more for the last three years, and expect to continue doing so.
Participants will only need to visit the research centre five times over the next three years.
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Findings will be out later this month
