It was a short, somewhat bittersweet and definitely unprecedented effort.

Malki, 17, was the first Qatari woman to compete in track and field at the Olympics, after the country decided to include female athletes — four in total — in its delegation for the first time.

Wearing a maroon head scarf, long sleeves and leggings, she stood out among the starters in the preliminaries in the women’s 100 meters Friday morning. She was slow out of the blocks, appeared to be very tight, and finally clutched at her right leg before stopping after about 15 meters.

The official result is listed as D.N.F. — did not finish — but just being there was a significant achievement.
After covering her face momentarily, Malki got to her feet and slowly limped off the track. She was then pushed out of the competition arena in a wheelchair.

The conservative Islamic nations Qatar, Saudi Arabia and Brunei were the last countries to enter women in the Olympics, each sending female athletes to London.

Maziah Mahusin of Brunei did not advance out of her heat in the 400 meters, but she did set a new national record when she crossed the finish line in 59.28.

“I’m really proud of myself, even though I didn’t win anything,” said Mahusin, who carried her country’s flag at the opening ceremony. “I’m really happy. I’m really, really happy.”

Tahmina Kohistani of Afghanistan finished way back in the 100 meters Friday and yet with a wide grin. She was the only female representative from Afghanistan on the track.

“I think being here is more important than a gold for me and my country,” said Kohistani, who finished last in her heat but in a personal-best time of 14.42 seconds. “We have a lot of problems in our country.

“So right now, I feel like I have a gold medal.”