Looking at the challenge and available footage Iâ€™m pretty confident that she did the 7 days in the challenge (that is to say she was present and running n the treadmill). The issue for me is that without truly independent monitoring itâ€™s hard to verify that she covered the miles claimed.
Running 521 miles in 7 days requires the athlete to run over 74 miles per day for 7 days. Whilst that *may* sound easy to some let me tell you, as a qualified Endurance Coach I can assure you that a run like that is beyond most runners. Indeed, when you look at the world record youâ€™ll see that Sharon Gayter (GB Athlete) hasnâ€™t managed that and, a well know ultra runner named Dan Lawson (also a GB Athlete) managed to run the same distance (521 miles) in the same time frame (7 days).
Iâ€™m not saying it isnâ€™t possible however, looking at the known results for Amy it seems unlikely that someone whoâ€™s ran a small sprinkling of 4 hour marathons and has an official marathon PB of 3.53 is capable of breaking a world record that several known international standard ultra runners were unable to beat. If she truly in that class of runners then I would love to see her running some 50 or 100K races and wearing a GB vest.