Rose has learned the art of winning
Sound of body, sound of mind. Justin Rose has never been physically stronger. And mentally he grows tougher by the day.
In contrast, Tiger Woods is left fretting and fearing after yet another injury setback.
The difference in fortunes heading towards the Masters could not be greater.
Rose can go into the year's first major with sky-high confidence after his first World Golf Championships victory in Miami on Sunday. Woods, meanwhile, is hobbling, his promising start to the year well and truly undermined by his latest Achilles injury.
Fitness is such a key component. The world's top three, Rory McIlroy, Luke Donald and Lee Westwood have reaped the benefits of punishing gym regimes. And add to that list the winner at Doral.
Rose has put behind him niggling and nasty back problems to start producing the best golf of his life.
His talent has never been in doubt but, too often, periods of fine form have been hampered by his longstanding back condition. Those days now appear to be behind the 31-year-old Englishman.
A final round two-under 70 was enough for Rose to win his fourth USPGA Tour win in Florida by a shot from Bubba Watson. Photo: Getty
"His confidence has been really high for quite some time," Rose's manager Marcus Day told BBC Sport. "It's a combination of hard work, putting better and a change to his set-up which has helped to eliminate his back problems."
This injury-preventing alteration has been supervised by coach Sean Foley who, ironically, seems to have been unable to do something similar for Woods, another of his pupils, who limped out of Doral with that problem in his left Achilles.
"Justin's set-up at the ball is very different," added Day, who also praised the work Rose has done with his Weybridge-based strengthening and conditioning coach Justin Buckthorp.
"He's had to work at it and put in the hours at the gym and he does an awful lot of stretching too," said Day.
Winning a WGC is a massive breakthrough for Rose, who in majors has still to better his fourth place finish at the 1998 Open when he was a 17-year-old amateur.
"There was a spell where I felt that I was competing nicely in the majors," said Rose. "In 2007, I had four Top 12 finishes and I had a good run at the Masters. I was one back on the 71st hole."
He finished fifth on that occasion but now he feels genuinely ready to challenge for the game's biggest prizes.
"I like the tougher tests, to be honest with you," said the Florida-based Englishman. "Hopefully I can back up that thought process this year.
"I'm getting old," smiled Rose. "I'm 31 now. I've learned the hard way a little bit.
" I've certainly had my chances in the past, as well. It's kind of nice to get a little bit of momentum and confidence going.
"I think it's probably a confidence thing. When I do get into contention now, I believe I can go ahead and close it out."
Like McIlroy and Donald, Rose seems to have learned the art of winning. This was his fourth victory in the last 20 months and, in showing a growing maturity when in contention for titles, he will travel to Augusta as a genuine Masters contender.
"Maybe you desensitise a little bit to the pressure," says Rose. "To the cameras, to the crowd and you get more comfortable.
"I think that's why guys like Tiger and Phil Mickelson are so good down the stretch and under pressure because they have done it so often."
But Woods is still struggling to recapture that killer instinct, having not won a counting Tour event since 2009.
Furthermore, once again, his concerns now are again more physical than mental.
Limping away from Miami was a huge blow to the former world number one. It shows that frailty in his left leg persists and it threatens the encouraging swing work he has been doing with Foley.
Woods was the inspiration behind the gym regimes of so many top players. Today professional golfers have never been stronger and the example set by the 14-times major champion is one of the primary reasons.
It is an extreme irony and desperately sad that a lack of fitness has so undermined Woods' career in recent years and continues so to do.
Rose, meanwhile, is the latest to offer proof that, when the body is strong, there is a much improved chance that the mind will be as well.