Former world number one Greg Norman believes Jason Day should be seeking to limit the number of tournaments he plays in 2017.
Day has topped the rankings following his victory in the WGC-Dell Match Play in March, although his lead at the summit has been cut after he was hampered by a back injury at the end of the 2015-16 PGA Tour season.
The Australian has not played since withdrawing from the Tour Championship in September and compatriot Norman hopes Day considers his schedule carefully when he returns, citing Jordan Spieth's dip in form as something to learn from.
"I'm going to sit back and see how he comes out of the off-season, how much golf he plays," Norman told Omnisport.
"Jordan Spieth fell into that trap a year or two ago, after he won the US Open and the Masters he fell into the trap of going around the world and go, go, go - you can't do that to your body.
"I don't care how young you are, your body is going to pay the price in a short period of time because you have no time to recover. Beds are different, pillows are different, food is different, internal cycle's different, you know, so you can't work out the same. Everything is different.
"So you've just got to monitor that, manage that. I can speak about that very comfortably because I was a global player for a long period of time and I knew I paid the price."