As a past half marathon runner and club runner myself, I know challenging yourself and seeing how you do against others is part if the fun. I also know we can sometimes worry about things going wrong and focus on this instead of focusing on your strategy and sticking to it.
Visualisation is a powerful tool to help you get your mind and body functioning at its peak and if the worst does happen, deal with discomfort or unexpected situations as best as you can. These techniques work for most sports and personal situations. If you are interested in finding out more contact me on 07580 540074 or email via website http://www.thedecisionclinic.co.uk/contact-us.html