Warning over brain damage from heading a football

New research from Stirling University has found that just one practice session of heading a football can lead to an immediate decrease in brain function and a halving of memory recall.

It is the first time this direct link has been found.

The problem could be at its worst for youngsters and there have been calls for Scotland to consider following the US in banning heading for very young players.

BBC Scotland's John Beattie has been finding out more.