This was my running track this morning: City Beach to Trigg and back -- 13.4 km. It was probably the toughest training session I've done yet.
Running on soft sand, in 20 km/h winds and through waist-deep surf surges was really hard. While I knew I had the fitness to complete the run, my brain just wanted me to stop and walk whenever I hit a difficult spot. I am finding such psychological barriers more difficult to overcome than physical barriers at the moment.
To get through the run I employed a technique of playing mental 'videos' -- an internal vision of a perfect training run -- whenever my motivation waned. It worked really well. As soon as I 'played the video' my entire body relaxed, especially the shoulders, and I felt physically lighter. The running became less difficult, even if I increased the pace. It was quite amazing and I completed the run in good time.
That old adage, 'it's all in the mind', may indeed be true.