Jackie Joyner-Kersee was far ahead of her world-record pace after four events in the two-day heptathlon, and Carl Lewis turned in the two fastest 100-meter heats of the year during Friday's first day of the U.S. Olympic Trials track and field competition.

Joyner-Kersee, the world record holder and 1987 world champion in the heptathlon, had a sensational day in the steamy Indiana University Track and Field Stadium. She climaxed it by winning her 200-meter heat in 22.30 seconds, the fastest ever by a heptathlete. With three events left on Saturday, she has 4,367 points, a first-day point record and 222 ahead of the pace when she established the world record of 7,158 points in the 1986 U.S. Olympic Festival at Houston.Joyner-Kersee set the previous world record in the heptathlon 200 of 22.85 in 1986 and the first-day point mark of 4,256 in 1987. The first-day mark was set during the World Track and Field Championships at Rome.

"Today is just a half a day," she said. "I can't afford to relax. I remember in Rome being on a good pace the first day and sort of sloughing off the second" and failing to break her two-day mark of 7,158.

She began Friday by running the 100-meter hurdles in 12.71 seconds and clearing 6 feet, 4 inches in the high jump, each effort the best ever for an American heptathlete, then threw the shot 51-4 1/4.

She will complete the heptathlon with the long jump, javelin throw and 800-meter run.

She skimmed over the hurdles flawlessly, breaking the U.S. heptathlon record of 12.85 she set during the 1986 Goodwill Games at Moscow.

Then, on her third and final attempt, she broke her American heptathlon record of 6-2 3/4 in the high jump, set at Rome in 1987. Joyner-Kersee didn't take any more jumps after clearing 6-4.

Terri Turner and Trish King also cleared 6-2 3/4, but each missed three times at 6-4.

Lewis, the four-time Olympic champion, won his opening-round heat in the men's 100-meter dash in 9.96, fastest in the world this year, then matched it in a second-round race Friday night.

"I wasn't pleased with the first part of my race, but then about 30 meters, I got into gear," Lewis, the co-holder of the American record of 9.93, said after the first race. "I felt good and I'm pleased with the time."

The times, equalling the seventh-best in history, broke the trials record of 10.06 set by Lewis in 1984, and the stadium record of 10.05 set by Calvin Smith in 1982.

The dash semifinals and finals are Saturday.

Lewis, trying to duplicate his 1984 Olympic performance, is seeking gold medals in the 100, 200, long jump and 400-meter relay.

Among those failing to advance to the 100 semifinals were 1987 national champion Mark Witherspoon and former Los Angeles Rams kick returner Ron Brown.

In the first final of the trials, Randy Barnes of Texas A&M won the men's shot put with a heave of 71-9 1/2, breaking the meet and stadium record. Also earning spots on the American team were Greg Tafralis, second at 68-6, and Jim Doehring, third at 67-8 1/4. Doehring edged Ron Backes by one-quarter inch for the final spot.

Edwin Moses, the 1976 and 1984 Olympic champion in the men's 400-meter intermediate hurdles, began his quest for a record third gold by easily winning his first-round heat.

Moses was timed in 49.31, the slowest of the five heat winners, but he was not concerned, except about the weather. He called the combination of heat and humidity the worst of his experience.

Kevin Young, the two-time NCAA champion from UCLA, had the fastest time among the hurdlers, clocking 48.27.

The hurdles semifinals will be run Saturday and the final Sunday.

Mary Decker Slaney, the American record-holder in all women's events from 800 meters to 10,000 meters, loped to victory in her 3,000-meter semifinal heat in 9:04.35 and advanced to Sunday's final.

The other heat winner in the 3,000 was NCAA champion Vicki Huber of Villanova in 9:06.62.

Diane Dixon, a 1984 Olympic relay gold medalist, registered the fastest time in first-round heats of the women's 400, clocking 51.00. She easily beat Valerie Brisco, the 1984 Olympic champion, who was second in 51.61.

The top qualifier for Saturday's triple jump final was Charlie Simpkins, with a wind-aided leap of 56-2 3/4. He was followed by Olympic silver medalist Michael Conley at 55-7 3/4 and world record-holder Willie Banks, a wind-aided 55-6 1/2.

Olympic champion Al Joyner also reached the final, jumping 55-1.