Griffin was knocked out of Sunday's loss to Atlanta when he took a hard hit from Falcons linebacker Sean Weatherspoon as he scrambled down the sidelines during the third quarter.
The rookie signal-caller was diagnosed with a concussion and underwent a series of tests before returning to practice.
"Felt sharp, I felt good," Griffin said told reporters. "No symptoms of a concussion or anything like that. No dizziness or off balance or things of that nature. I felt good."
Griffin's status for Sunday's game against the Minnesota Vikings, however, remained uncertain.
"I'm still not cleared by any means for full contact," last year's Heisman Trophy winner admitted. "As a quarterback you don't get hit in practice so I can still go out and practice a little bit."
Fellow rookie Kirk Cousins would likely start for the Redskins if Griffin in unavailable.