How do you achieve a world record?

Have you got any idea what it’s like to attempt a world record?   Nope?   Neither do I, but for some reason this brain has decided that these 50 year old legs are going to run …   1651 miles in 63 days🏃‍♀️   Or 2642 kms if you’re metric 🏃‍♀️   Or 63...