The Senegal international missed the club's training camp in Portugal after refusing to wear the club's Wonga-sponsored shirt or training kit because of his religious beliefs.
Cisse hopes his self-imposed absence will not be a problem and hopes to have his fitness levels up to Premier League standards well before the start of the season on August 19 at Manchester City.
"It has been a very difficult time for me and the club, and also for the fans," Cisse said. "I have had some useful discussions with my club, my family and Islamic teachers in the last few weeks.
"After a huge amount of thought and reflection, I have made the decision to follow my team-mates and wear the kit.
"Now I think it is important for the team and the fans that we concentrate 100 per cent on football.
"Although I did not go to Portugal on the training camp, I was back here working hard on my fitness and preparing for the start of the new season.
"Since then, it has been great to be training with my team-mates again. I feel great and ready to go, and cannot wait to be out there against St Mirren on Tuesday and to play my part for the team."