Im hardly out of the house because Ive been studying in between training.
Former Miss World Rosanna Davison (28) admits she has become a hermit ever since she has started training for the Ironman Triathlon and can't stand going to bed early.
The top model, who is a regular on the glitzy Dublin social scene, has swapped her stillettos for sweats and has cut back on the booze in a bid to get fit by September.
"Training is going good I go for runs three to four times a week and then I run on the treadmill at home. I have been doing 8k and 10k runs and have to go on a few 20k runs with Paul Byrne next week, which I'm dreading!" she told the Star.
"I'm hardly out of the house because I've been studying in between training. I'm quite a moderate drinker so I don't have to tweak that so much so I just have to keep the head down and keep training."
Rosanna will join hundreds of competitors for the gruelling challenge in Galway in September that starts with a 1.9K swim in Galway Bay followed by a 90K bike course and will finish with a run around Salthill.
She admits the hardest thing about staying in and training is the early nights.
"I am trying to go to bed earlier and get more sleep but it's very difficult. I had my last exam of the year on Saturday so I was up late resigning and there's way too many distractions like TV, Twitter, it's nearly impossible to go to bed early these days."
Although super-slim Rosanna is worried about the expected weight loss as she continues the intense training.
"No big changes yet but I'd imagine there'd be a bit of weight loss in a few weeks with all the running. I've just been eating veggies and healthy carbs such as brown rice and drinking lots of water. But I'm conscious of replacing the calories I have burned."
The blonde bombshell also revealed she couldn't do without the backing of her boyfriend Wes Quirke who has been supporting her all the way.
"Wes has been very good, he's been really sweet and supportive and is a happy side effect. He's been encouraging me to eat healthier and is going for runs with me, so it's so far so good!"