I am currently training for a half marathon but can't run for more than 5km without needing a poo (sometimes VERY urgently) apart from that my training is going quite well but it is massively impacting my training. I have tried eating 2 hours before so I can poo before I run and assume not eating at all would impact my energy. I don't want to pull out of the half but I really don't know what to do. Does anyone have advice? I already take imodium before I run which does not help.