The Guinness officials need not drug test Glenn Haworth after his world record attempt this weekend - he assures us he will be taking on his marathon musical milestone totally clean.
"I'm trying not to use caffeine, coffee, Red Bull or anything," Haworth said of his latest endeavour, planning to play ukulele for at least 24 hours starting today.
"I might have some green tea, but I'll just be eating lots of protein and carbs, and a lot of fruit and vegetables."
Haworth will need all the strength and energy he can get. While no record officially exists for marathon ukulele playing, Guinness said they would give him the title if he played for a minimum of 24 hours straight.
"I've been working hard, I've learnt about 100 songs on the ukulele and got the repertoire down," he said.
"I've been having lots of vitamins and supplements to feel fresh. I just have to make sure to get a good night's sleep."
Haworth will attempt his latest world record - after claiming the title for most guitar strings changed in one hour in 2009 - at the Wollongong Haworth's store, starting from 11am today.
All going to plan, he will claim the record at 11am tomorrow, after a full day of trying to keep himself alert and occupied while playing the miniature instrument.
"I've got a mini trampoline, which I'll have a bounce around on while I'm playing, and it's small so I can walk around with it," he said.
"The rules give me a 30-second break between songs, which is just enough time to stretch and keep the heart rate going."
Haworth's world record will benefit the Make A Wish foundation. Through online donations, in-store donations and a big raffle tomorrow - where thousands of dollars of guitar equipment, as well as the custom instrument designed for him by Maton Guitars will be sold off - he hopes to raise over $50,000.
"A good crew from Make A Wish will be supporting me, and they will have some wish kids there to sing some songs with me," he said.
Haworth starts his world record attempt at 11am today at Haworth's Wollongong store, 135 Princes Highway in Fairy Meadow. The raffle, and sausage sizzle, are 11am on Saturday.