Bell, who tore two ligaments in his right knee in November, had 58 total yards in the Steelers' 27-14 win over the New Orleans Saints on Friday night.
Bell caught five passes for 37 yards and rushed for 21 yards on three carries. He also had a fumble on a third-and-18 play.
"I can only imagine how I'll feel in a month," Bell said after the game. "Obviously I've still got to be the same player, be aggressive, deliver some punishment -- but I've got to be smart.
"I definitely still feel a little rusty, but I think with me playing first half, I tried to shake a little of the rust off. The more situations I play I'll be better. That third-and-18, I had the fumble, that's just a situation I haven't been in in a long time. I just got to get back into my rhythm. I'm glad I got the fumble out of the way in the preseason."
Bell will miss the first three games of the season after the NFL reduced his suspension for violating the league's substance abuse policy from four games to three.
"I want to use that time I'm suspended to try to (let) my knee get better, because in three or four weeks it's going to better than it is today," Bell said. "And I feel great today. I can only imagine how I'll feel tomorrow."