As I run my daily miles in the relative heat and humidity of South Dakota summer days and think how uncomfortable it can be I only have to go to @https://3100.srichinmoyraces.org/#event-3100-section and read the daily updates of how these runners are putting in 50, 60, or even 70+ miles in temps into the 90's in NYC. No complaining or whining about the conditions, just the inner strength and determination to continue on for 3100 miles. Some days I think of how I would like to immerse myself in more of the inner peace and meditation to help me with the mental endurance to train for, and compete well in, any ultra that may come along.
Enjoy this wonderful video from Jessie Beers-Altman on Vimeo (it's free) that follows one of the 3100 runners in the 2008 edition of the race - Suprabha Beckjord
As a side note I have had the pleasure of running in a couple of the SCMT ultras in the past. The dedication and attention to the runners by the Sri Chinmoy people is incredible. They are truly wonderful.