In those closing meters, a sprinter can produce anywhere from 1,200 to 1,600 watts of power, a quick burst lasting 5 to 12 seconds.
Shelly Ann Fraser-Pryce, the reigning world and Olympic champion from Jamaica, lost her spot on the podium in the closing meters, missing out by one hundredth of a second.
To claim it, he had to hold off Ibrahim Jeilen, the Ethiopian who passed him in the closing meters to win in Daegu.
Wariner, the Olympic and world champion, passed his United States teammate LaShawn Merritt in the closing meters to win the 400 in 44.05.
While De Bruijn's first two victories in Sydney -- in the 100 butterfly and 100 freestyle -- were utterly convincing, this one was in doubt until the closing meters.
Bolt was last out of the blocks, and even with a healthy lead over Walter Dix of the United States, he pushed all the way through the finish line, straining in the closing meters as he appeared to be fighting the final-phase muscle lock that is usually the concern of lesser men.
Other winners on closing night included Christian Taylor of the United States in the men's triple jump, Tatyana Lysenko of Russia in the women's hammer throw, Mariya Savinova of Russia in the women's 800 and Mo Farah of Britain in the men's 5,000 in yet another compelling race in which he held off the former world champion Bernard Lagat of the United States in the closing meters.
RIO DE JANEIRO (Reuters) - Maya DiRado of the United States won the women's 200 meters backstroke in her final race on Friday, reeling in Hungary's Katinka Hosszu in the closing meters to deny her a fourth gold medal of the Rio Olympics.
He was more spectacular anchoring the 4x400 relay, closing a 20-meter gap and winning by 3 meters.
Coefficients of Bolsa Família treatment were estimated while controlling for individual child characteristics (age, gender, race), mother's characteristics (age, race, literacy, education), and household characteristics (water meter, light meter, closed sewer, total household income, number of household members, other government benefit, employment status of household members).
