Others wondered how sports like equestrian and disciplines like race walking and rhythmic gymnastics survived.
The marathon, road cycling, triathlon, open water swimming and race walking are the events most at risk.
Friday's meeting will be followed by the 14th Dublin International Grand Prix of Race Walking in the Phoenix Park on Sunday morning (0900 BST).
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Those afternoons the light died quickly and we talked nearly non-stop, race-walking into the wind.
Mr. Cunningham had finished the race and was walking in Boston Common with his family when the blasts hit.
She's alive, according to a Virginia charity whose 5K race the child is pictured walking in last year to raise money for the medical bills of sick kids.
That is a day after her husband, two-time power-walking medalist Jared Tallent, has his first race.
Experiences like election night 2000, when Daley had to make the tough call to stop Gore from walking out to Memorial Plaza to concede the presidential race to Bush.
But some say that will never happened in a sport where drivers are walking and willing billboards for sponsors, who pour millions in the race teams and keep NASCAR thriving.
So when things like that happen during the race, they usually get long periods where people are walking their bikes through the snow until a snowmobile goes through or a different trail-breaker go through and pack down the trails so they can ride.
Chin said that if she were to try to keep pace with the top women for the first half of the race, she probably would be so exhausted that she'd wind up walking by the end.
Posner, a prolific ultramarathoner currently in training for a 200-mile race in Vermont this year, wanted to broaden the scope of distance running and walking by opening the time frame for Rock the Ridge to 24 hours.
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