My left knee remained tight , throwing my normal stride off a bit , making my running feel quite awkward . I managed to maintain the pace over the next couple kilometers , but then I started getting a muscle cramp in my left thigh . I knew this was caused from my awkward stride and tried to ignore it . By the halfway point I was hurting and was losing speed rapidly .

Question: What happened as this pain continued ?
I decided to quit the race because I did not want to properly injure myself