The bone bruise in his right knee caused the Sixers to push the return date from training camp to the regular season. The Sixers said in early November the goal was for Bynum to resume "normal basketball activity" around Dec. 10. He would then need 1-to-4 weeks of conditioning and practice before he can play in his first game for the 76ers.
That plan was quickly scrapped after he injured his left knee bowling last month.
The exam on Thursday showed Bynum's weakened cartilage hasn't gotten worse. Bynum said the potential of surgery is off the table.
Sixers general manger Tony DiLeo said the best-case scenario all depended on how Bynum's knees reacted to the increased exercise.
"This is good news," DiLeo said. "We can move ahead to the next phase of his rehab. This isn't something where the doctor says he has to rest."
Bynum was coming off his best NBA season after averaging career highs with 18.7 points and 11.8 rebounds while making his first All-Star team, starting for the West. He was the NBA's third-leading rebounder and 20th-leading scorer, while also ranking sixth in the league with 1.93 blocked shots per game.
Follow Dan Gelston at www.twitter.com/APGelston