Gregory posted on her Facebook page Feb. 2: \"2 laps around a basketball court is still pretty far from a marathon. But do you know where else it's far from? Where I was a week ago.\" \"Seeing progress every day and I'm only getting stronger from here\"

Running with a prosthetic leg has been challenging, she wrote to ABC News, because she can't feel it hitting the pavement. She likened it to an \"elbow grinding against a hard surface all day.\"

I will never be able to look down and see two real feet but I have to admit...being a \"robot mom\" is kinda cool. World....meet Forrest- my newest addition/ running blade. ;) #blessed #runforrestrun

A photo posted by Rebekah Gregory (@rebekahbstrong) on Mar 10, 2015 at 2:42pm PDT

Gregory was also among the witnesses who testified at the trial of Dzhokhar Tsarnaev, who was found guilty this month on all 30 counts relating to the 2013 bombing. She told ABC News' Brian Ross testifying helped her overcome her fear of Tsarnaev, whom she called a \"coward.\"

\"I didn't realize I was so fearful, but I truly was and until yesterday, I had this sense of insecurity because of how much I had lost at the finish line that day and I took so much of that back,\" she told Ross in a March interview.

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