On EBSCO .NOVELIST PLUS : IN Ultramarathon MAN ,who is REBECCA Sigmon ? That how is the question posted.Thank you for your help.

You know, instead of wasting time posting the same question over and over -- and getting the same answer -- you should undoubtedly read (or re-read) the book and see what you find.

Here's what I get just googling ULTRAMARATHON MAN:
http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=ultramarathonman#hl=en&sa=X&ei=eOOvTN3BM8aqlAek-pTlDw&ved=0CBcQBSgA&q=ultramarathon+man&spell=1&fp=5a996d56de453056

And here's what I get if I add "Rebecca Sigmon" to the search terms:
http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=ultramarathonman#hl=en&expIds=17259,17315,23628,23670,23756,23945,24692,24878,24879,25567,25646,25834,26328,26645,26656,26746,26761,26849,27006,27015&sugexp=ldymls&xhr=t&q=ultramarathon+man+%22REBECCA+Sigmon%22&cp=33&pf=p&sclient=psy&aq=f&aqi=&aql=&oq=ultramarathon+man+%22REBECCA+Sigmon%22&gs_rfai=&pbx=1&fp=5a996d56de453056

The only person online who puts the two together is you on your posts here.