"He said the key was a slow pace over the 26.2-miles."

"He ran every race, he never walked. He ran at a rate of 10 kilometers per hour"

The man ran 6:13 miles[1]...in a marathon...each day, for 365 days in a row.

And he calls that a slow pace!

[1] Update: It's actually 6.2 miles per hour (the equivalent of a 9:40 mile), - still not too slow. I apologize for confusing miles per hour with mile times].