The four-time champion, 42, had back surgery under a year ago but is among an 87-strong field at the 82nd Masters.
“I thought prior to surgery, I’ll have a nice comfortable life but I’ll never swing a club like I used to,” he said.
“But all of a sudden my body and speed and timing are back.”
Woods won the last of his Green Jackets in 2005 and the most recent of his 14 major titles came at the US Open in 2008.
Since then, there have been numerous revelations about his personal life and debilitating injuries to deal with.
He was arrested on suspicion of driving under the influence when he was found asleep at the wheel of his car a month after having fusion surgery to repair his back in April 2017.
The American, who had five prescription drugs in his system, later pleaded guilty to reckless driving and will spend a year on probation and undergo a diversion programme.