Her uneven bars routine , the most difficult in the world , needs to be altered after rule changes which have reduced the time gymnasts can spend on the bars .
When Tweddle resumes training she will have some work to do .
Tweddle 's uneven bars routine , the most difficult in the world , needs to be altered after rule changes which have reduced the time gymnasts can spend on the bars .
When Tweddle resumes training she will have some work to do .