BETHLEHEM, Pa. - The afternoon heat and a full stomach are a bad combination for someone who needs to run around on the field for more than two hours. Just ask Eagles wide receiver DeSean Jackson, who could be seen vomiting during Friday's practice.

"We ran a lot. The heat," Jackson said after practice. "Gave it up a little bit, but it's part of training camp."

The new collective bargaining agreement ended two-a-days, so the Eagles conduct one walk-through and one full practice. Coach Andy Reid elected to make the practice in the afternoon this season as opposed to the morning, when Reid usually held the intense portion of the day. The afternoon practices will not be like the morning practices when Reid first became head coach, but they'll be close.

"The positives are it allows players to get a lot of fluids in before that practice," Reid said. "It also gives them the opportunity to get two meals in before that practice, which we think is important in that whole process."

There are different opinions on whether the intensity is better in the morning or the afternoon. Jackson and Jason Avant, two veteran receivers, both prefer a morning practice. Jamar Chaney and Brian Rolle, two young linebackers, spoke up for the afternoon.

"I think if you talk to the players they would rather be moving in the afternoon when it is a little hotter," Rolle said. "They would rather move as opposed to standing there getting beat up by the heat."

Unless the heat causes a player to lose his lunch.

Play of the day

There is still a little more fuel left in President Obama's "Tell Vick to slide" remark, because quarterback Michael Vick slid during Friday's practice. He waved his hands after the slide, inciting an ovation from the crowd.

"You get it from the head man, the man who runs the world, the U.S., hey, you got to listen," Vick said. "I'm a great listener."

Quote of the day

The pads will finally come on for Saturday afternoon's practice. That means the Eagles will be able to hit - something that usually excites the defense, which spent Friday's team drills needing to let up whenever a play could be made.

Joselio Hanson is one of those who are eager to hit.

"I haven't tackled anybody since Jan. 1," the cornerback told reporters.

Jan. 1 was the Eagles' season finale. Hanson had two tackles that day.

Bird brains

The first-team defensive line on Friday featured Trent Cole and Jason Babin at the ends with Cullen Jenkins and Derek Landri at tackle. Brandon Graham and Darryl Tapp were the second-team ends, while Antonio Dixon and Fletcher Cox filled the middle. . . . If you're trying to handicap the backup-quarterback spot, it wasn't encouraging for Trent Edwards that he received only one play under center in 11-on-11 drills. . . . The Eagles have a walk-through at 8:15 Saturday morning. The pads go on for the 2:45 p.m. practice. The offensive linemen will sign autographs after the final horn.

Jeff McLane contributed to this article.