I’ve run three halfs in the last year. Biggest thing for me is focusing on my stride in the second half. As your legs start to weaken, your stride will suffer which may leave you at risk of an awkward step that could have you dealing with rehab in the weeks after the run. For me personally, a single odd step (imagine going down stairs and thinking there’s one more at the bottom when there’s not) has sidelined my training for almost two months now. I can still run, but I can’t push distance at all. It’s to the point where I’m considering another couple weeks off even after a month with no running after the half.

Keep your eyes on the upcoming terrain and make sure it doesn’t surprise you.