The 40-year-old 14-time major champion twice had back surgery during 15 months out before returning in December, when he tied for 15th at the 17-man Hero World Challenge.
Over the next five weeks he plays four full-field tournaments.
"That is a concern, no doubt about it, but I'm also looking forward to it. I've sat out long enough," Woods said.
"I've gone through some pretty tough lows. There were points when I didn't know whether I would swing a golf club again.
"But I do feel good about it. I just need to get out there and do it and see what happens."
Woods begins his 2017 season at the Farmers Insurance Open in San Diego, which begins on Thursday.
He will then play at the Dubai Desert Classic from 2-5 February, followed by the Genesis Open at Riviera from 16-19 February and the Honda Classic in Palm Beach Gardens from 23-26 February.
"I've got my body in a pretty good state where I feel I can handle that workload, but I've still got to go out there and do it," he added.
"Feeling good about it and doing it are two totally different things."
Media playback is not supported on this device

The girl was forced into a vehicle in Bishop's Stortford at about 20:30 GMT on 16 February and dropped off near the town's railway station the following morning.
An E-fit image of the attacker has now been released.
Police said the attack had caused "concern within the community".
The girl was forced into a dark-coloured vehicle, thought to be a Land Rover, and taken to an unknown location, believed to be outside the county of Hertfordshire, where she was sexually assaulted.
Ch Insp Gerry McDonald of Hertfordshire Police said: "I believe local people hold the key to our investigation.
"This is an extremely serious matter and one which, understandably, has caused concern within the community.
"We have conducted a number of inquiries in the local area but would ask anyone who was around between the times mentioned and who has not yet spoken to police to contact us if you have any information which may assist our investigation.
"I would like to reiterate that this is an unusual incident and would reassure everyone that investigations into this incident are a priority."
Tiger Woods admits he has concerns over the physical challenge of stepping up his return from long-term injury.
[NEXT_CONCEPT]
Police are hunting for a man who raped a 14-year-old girl from Hertfordshire while holding her prisoner for nearly 12 hours overnight.