Caitriona Jennings was delighted to see her plan come to fruition after setting a new 100-mile world record over the weekend.
The 2012 Olympian from Donegal set a time of 12 hours 37 minutes and four seconds in Illinois, coming in more than five minutes quicker than the previous record.
In an astonishing show of concentration, she managed to pace herself on each mile, clocking them in seven minutes and 26 seconds each, and finishing fourth overall.
"I'm absolutely delighted," she said on RTÉ's Morning Ireland.
"I'm just really pleased that I was able to go out and execute the race like I had hoped and the best I could. I'm just delighted that it paid off.
"If everything went well on the day, I was hoping that the world record might be a possibility. But it was it was definitely my A plan and I wasn't 100% sure it would happen.
"I had never run longer than 60 miles before so there was a huge unknown there. But my training had gone really well. So following quite a good training block, I said I would set out on pace and try and hold that as long as I could and see, see how it played out.
"At the start of the race, because it's such a long race, you have to really hold back and run slower than you would think you would anticipate when you're usually racing.
"I just kept telling myself to be patient at the start and it went better then than I had thought. So that was good."
Jennings wasn't hanging around after the race, as she explained on the programme.
"I flew back with my husband from Chicago overnight. So, yeah, a little bit stiff getting off the plane this morning, but not as bad as I thought it would be.
"Immediately after the race, I was really stiff. My legs were definitely very spent but I seem to have recovered faster than I had hoped."
Listen to Morning Ireland's full interview with Caitriona Jennings below
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