Westwood and his family relocated from his hometown of Worksop to West Palm Beach in Florida in December. He recorded 35 international wins based in the UK but was keen to leave in search of better weather to practice in.
The 39-year-old, who turns 40 next month, believes he will also benefit from less travel time between events.
“It becomes frustrating to play a couple of weeks and then have to fly back to England and go through the time zones, and then come back and do it all over again. It just wears you down after a while. That was one of the main reasons for moving,” he said.
Westwood will learn more about the impact of his decision at next month’s Masters, the first of three major championships in the US in 2013.
The Englishman has finished in the top 10 14 times in majors and is always a favourite in the online golf betting odds. He has threatened to win his first-ever major in recent years but has struggled to get over the line. Westwood narrowly missed out to Phil Mickelson at Augusta National in 2010 before another second-place finish at the Open three months later.
Westwood reached number one at the end of 2010 but has dropped to 11th and has not tasted success since winning the Nordea Masters in Stockholm last June.
Despite the slump in form, Westwood insisted he feels fitter now than he did at 30. He remains confident he can end his long wait for a major.
“Hopefully I will win one major before I’m 40 and win some more when I’m in my 40s. You look at Vijay Singh’s career, he’s been very successful after the age of 40,” Westwood added.