Not long ago, I recounted the events of the day when my parkrun record was on the way to being smashed (less than 40 minutes!) and failure ensued when I had a loose shoelace (which surely must have taken minutes to retie?). A kind soul (of which there are many here) recommended elastic lock shoelaces, which I had never heard of. No problem in finding them on Ebay and I invested £1.99 in a pair. After testing I can thoroughly recommend them - no looping lace and passing it through to make the knot. Just put the shoe on and pull the laces to ensure good fit.
But then you all knew this.