In a 110m or 100m hurdle race how many hurdles can be knocked over and how many have to come back up?
Hello, The rule is that you are not allowed to deliberatly knock
over hurdles. If you would through them over with your hands for
example you'd be disqualified. However if you just run over them
and you happen to knock them all over then it's up to the officials
to decide if you knocked them down on purpose. But really, you can
knock them all over and it's okay because I don't think anyone gets
disqualified for this nowadays. However I advise you to run over
them and not hit them because it is much faster.