The longest radio DJ marathon lasted 198 hours and was achieved by Giel Beelen (Netherlands) on the GIEL! Breakfast Show on 3FM Radio, in Hilversum, Netherlands, from 12 May 2014 to 20 May 2014.
Giel started his attempt on 12th May at 6am and finished it on 20th May at 12pm. During the attempt he was monitored closely by a medical staff comprising 2 medics, 2 physical therapists, 1 nutritionist and 2 sleep experts. He didn't leave the studio except for toilet breaks and 'power naps'. Every day at noon, a chef cooked lunch for Giel which he ate behind his DJ set. He also had a 'deskbike' under his table so he could exercise his legs and feet whilst sitting in his chair.
Comments below may relate to previous holders of this record.