In 2008, he ran the entire Akron Marathon while juggling.In 2010, he ran it wearing sandals.In 2013, he ran it pacing his wife, Stephanie, a nonrunner who wanted to experience a marathon. The feat kept them on the course for five hours and 19 minutes.“Every couple of years, I look for something new to challenge myself with,” said David Livingston, a computer programmer from Wooster who has raced in every Akron Marathon since it launched in 2003.So what’s he got in store for this year?Jumping rope the entire 26.2 miles.If he can cross the finish line in less than four hours, 28 minutes and 48 seconds, he’ll set a Guinness World Record.“It was February or March and I was wondering what I could do this time, and I said, ‘Let’s get a jump rope and see if I can even do it.’ I got it and tried it.