BEIJING — It sounds so simple.

The Big Man hambones the final 20 meters in Saturday's Olympic 100-meter final and still covers the distance in 9.69 seconds, breaking the world record he set earlier this season.

The Big Man began running the 100 only this year and has much more experience in — and a greater passion for — the 200.

So the Big Man will take down the record in the long sprint, the 19.32 that remains otherworldly 12 years after Michael Johnson set it in the 1996 Olympics final. No one has come within three-tenths of a second since.

After all, no less an expert than Johnson said two months ago, "I'm ready to kiss the record goodbye, if he keeps on doing what he has been doing."

Usain Bolt of Jamaica has done more than that since getting Johnson's attention May 31 with his first 100 world record of 9.72 seconds. He has run the fifth fastest time ever in the 200, a 19.67, and the three leading 200 times of this season.

"I used to think 19.32 was untouchable; now I think it is touchable," said Debbie Ferguson McKenzie of the Bahamas, Olympic 200 bronze medalist in 2004.

And what did the Big Man think about this after running the fastest time, 20.09 of Tuesday's semifinalists?

Bolt is just plain tired with one race left in the first major meet where he will have run eight sprint races, even if he has not been pushed from start to finish in the first seven.

"I'm going out there and run my heart out and anything that comes, comes, but right now it's kind of hard," Bolt said. "I've been through four rounds of the 100 and three of the 200, so it's kind of hard to go out there and get the record that's been so far away."

No man has set records in both sprints at the Olympics. Not since Carl Lewis in 1984 has a man won both.

"I'm definitely going out there hoping I can win both, but the 200 would mean a lot more to me," Bolt said two weeks ago.

A year ago, when Bolt was running only the 200 at the world championships, he came through the curve with the lead but could not hold off Tyson Gay of the United States in the straightaway.

Johnson expressed amazement that Bolt was able to run a 19.75 last year "given that he's not the most technically sound 200-meter runner."

At 6 feet 5 inches, Bolt is unusually tall for a sprinter, with a stride length that helps even when he tires.The long strides would not be as effective were Bolt not able to combine them with a rapid turnover.