These runners have pulled off some amazing running feats. Are they superhuman, obsessed or just out of their minds?
Professional runner Michael Wardian is aiming for a Boston PR this year as he remembers the tragedy that unfolded in 2013.
Wardian raced 52.4 miles on Sunday at an average pace of 6:15 per mile.
The 39-year old successfully completed the first half of an epic marathon double.
Check out these great shots from San Antonio!
Virginia's Michael Wardian aiming for two sub-2:30 marathons in the same day.
The 41-year-old claimed the first marathon victory of his career.
The 38-year-old defending champion is coming back from severe injuries.
There's a $20,000 prize purse up for grabs.