One day they were bedridden, fighting the violent symptoms of stomach flu.

The next day they soared through the air in the halfpipe, showing why they will represent the United States in next month’s Winter Olympics.

Many of the competitors at the U.S. Snowboard Grand Prix at Mount Bachelor suffered from a 24-hour virus, but still managed to compete on Sunday, the final day of the event, which included the halfpipe finals and the slopestyle finals.

Shaun White of Carlsbad, Calif., and Gretchen Bleiler of Aspen, Colo., both suffered from the flu, but went on to win the halfpipe finals on a cold, snowy day – each earning $10,000 and proving why they had both already locked up a spot at their first Olympics.

Two more halfpipe riders who fell ill Saturday also took big steps toward securing Olympic berths on Sunday: Mason Aguirre of Mammoth Lakes, Calif., who finished second in the men’s finals, and Hannah Teter of Belmont, Vt., who was second in the women’s finals.

The Grand Prix at Bachelor is the third stop of the U.S. Grand Prix tour that qualifies halfpipe riders for the Olympics, set for Feb. 10-26 in Turin, Italy.

White, who won his third-straight Grand Prix of the season with a first-run score of 45.3, said he was suffering from the flu on Saturday, when the halfpipe finals were postponed due to blizzard-like conditions.

”It was terrible,” White said at the bottom of the halfpipe, moments after taking his last run. ”I was so sick I just wanted to go home. When they canceled it (Saturday) I was like, ‘Yeah!’ But I feel better today.”

White, 19, said the conditions on Sunday still made riding difficult: the snow that fell throughout the day slowed riders in the halfpipe, and the visibility was below average.

”I was just trying to see at the top,” White said. ”I was getting dizzy. It’s really hard because I had to take my best run and tone it back a bit because of the weather. I think that’s what hindered a lot of people – the weather was holding them back from doing their tricks. Today it was who can ride the best in these conditions.”

On White’s first run, he executed a 1080 (three rotations) with a nose grab. His score of 45.3 held up as the best of the day through both rounds, so he made his second run easier, a sort of victory lap. (A rider’s lowest score of the two runs is thrown out).

”I really just wanted to go big and have some fun with it,” he said.

Bleiler said she was ”overwhelmed” with her second Grand Prix victory of the season. The snowboarder was visibly weak and said she had been throwing up all morning.

”I woke up, threw up, and took some Imodium,” Bleiler said. ”So I really had to give it everything I had to struggle through it all, and I think that’s kind of what got me through it. I had to work so hard.”

Bleiler, 24, fought through the fatigue to perform a solid first run, which included a 720 (two rotations) and gave her the winning score of 42.5. She crashed on her ”victory lap” second run, but that did not matter.

”It was just a hard competition for everyone,” she said. ”I was able to keep it together, so now I’m going to go home and sleep for a whole day, I think.”

Aguirre, 18, was so sick on Saturday that he made a trip to St. Charles Medical Center-Bend to get rehydrated. Somehow he managed to bounce back on Sunday with back-to-back 1080s on his second run, good for a score of 43.80.

”It didn’t affect me (Sunday), but (Saturday) I wasn’t feeling very good,” Aguirre said. ”I was throwing up a lot. I was dehydrated. I slept all day after the contest was postponed. I’m stoked just to be here.”

Aguirre said he ”woke up feeling great” on Sunday, but the snowy conditions still made performing tricks difficult.

”The pipe was great, but the snow definitely affected it,” Aguirre said. ”There were some speed issues. But I had to go for broke in my second run.”

Danny Davis of Highland, Mich., finished third in the men’s halfpipe finals with a score of 43.3. Andy Finch of Truckee, Calif., was fourth (42.4) and Scott Lago of Seabrook, N.H., was fifth (38.6). Twenty men competed in the halfpipe finals.

On the women’s side, Teter’s second-place score was a 41.10. Elena Hight of South Lake Tahoe, Calif., finished third (39.2) and Kelly Clark of Mammoth Lakes, Calif., who won the 2002 Olympic gold medal in the halfpipe, was fourth (38.6). Tricia Byrnes of Stratton Mountain, Vt., took fifth (37.9). Ten women competed in the finals.

Based on results from the Bachelor Grand Prix, the field of riders will be cut to the top 20 men and top 10 women best qualified to make the Olympic team. Halfpipe riders are named to the team based on the best two results from the five Grand Prix halfipe contests. The U.S. Olympic snowboard team will be announced Jan. 21, following two more halfpipe contests at the final U.S. Snowboard Grand Prix in Mountain Creek, N.J., on Jan. 20-21.

In the slopestyle finals on Sunday, Tim Humphreys of Waterville Valley, N.H., claimed first place out of 16 riders in the men’s competition, winning $3,500. He said it was his ”first big win.”

”I just wanted to do the run I planned and it worked out pretty well,” said Humphreys, 18. ”Hopefully, this win will lead to more contests that you have to get invited into. It really boosts my confidence. I’m definitely pumped.”

The slopestyle course included a picnic table rail and two big jumps, off which riders performed their tricks.

Wyatt Caldwell of Sun Valley, Idaho, took second, and Scott Lago was third.

Austin Smith of Bend fell on both his runs and finished out of the top 10.

”It’s a total bummer,” Smith said. ”Since I made the finals, I would have liked to have done better. But whatever, I’ll go ride some powder.”

In the women’s slopestyle finals on Sunday, 15-year-old Jamie Anderson of South Lake Tahoe claimed first place out of seven competitors and took home $3,500.

”They were not my very best runs, but they’re the best I could have done today (in snowy conditions),” Anderson said.

Kimberly Fasani of Mammoth Lakes took second, and Jordan Karlinski of Aspen finished third.

Ashley Thornton of Bend claimed fourth place, despite falling on her second run.

”My first run was fine,” Thornton said. ”It was just stock and nothing big. I’ve never hit these jumps before. This was my first time ever doing a Grand Prix, so I’m totally stoked.”

Twelve-year-old Ben Watts of Bend won the junior division of the slopestyle finals, which included seven snowboarders.