Sweat-wicking shirts! Compression socks! Non-bouncing shades! UV-proof hats! Neck buffs! Trail shoes! Gaiters! Racing shoes, carbon-plated! Recovery flipflops! Base layers! Jackets, rain and windproof! Reflective gear! A smartwatch! Training plans! Runners' memoirs! Club membership! Race signup fees! Gels! Electrolyte mix! Protein bars!
And have you tried spirulina, it does wonders for recovery (so they say)
The Western States trail in the California Sierras used to be where a 100-mile horse race took place that horse and rider had to complete in 24 hours. At some point in the 1970s one of the riders decided not to take a horse, and he finished in 23 hours on foot. Now it's an annual footrace that the winner finishes in about 14 hours.