Describe a challenge you overcame

The challenge I want to talk about is training for a half marathon a couple of years ago, which doesn't sound like much until I mention that I'd torn a ligament in my knee a year before and hadn't run more than a few hundred metres since. It was difficult mainly because my body and my confidence had gone in opposite directions — physically I'd mostly recovered, but mentally I flinched every time I picked up the pace, half expecting the knee to give out again. What I actually did was almost embarrassingly slow — I started with walking, then short intervals of jogging mixed with walking, following a plan a physiotherapist gave me, and I stuck to it for about four months even when progress felt invisible week to week. There were a couple of setbacks, a flare-up of pain that set me back nearly three weeks and made me seriously consider giving up on the whole idea. In the end I finished the race, not particularly fast, somewhere in the middle of the pack, but I crossed the line and genuinely couldn't stop grinning for the rest of the day. Afterwards I felt something closer to relief than pride, if that makes sense — less 'I achieved something impressive' and more 'I trusted my own body again,' which turned out to matter a lot more to me than the finishing time ever did.