Muamba earned plaudits from leading figures within the game for his determination to return to action following an on-pitch cardiac arrest in Bolton's FA Cup tie at Tottenham in March.
The 24-year-old had a pacemaker fitted to help ease the pressure on his heart, but he retired in August upon doctors' advice.
"I've already adjusted myself to the idea that I'm never going to be able to kick a ball again but life brings different challenges," Muamba told the BBC's Football Focus.
"When I first came to the country football was the only thing I ever knew. I'm sure I'm not the only professional who won't be playing football for a very long time who has to adjust in their life after football.
"You just have be able to make sure you enjoy the game but you also have to able to accept the fact your time is up and move forward to a different direction."