The Red Devils started contact training last week in preparation for the Premier League's return this month.
Ighalo admits it has been 'strange' training with restrictions, but the Nigerian says the team is improving on their fitness.
"I'm getting better and better every day," he told the club's website. "We have been training together the past two weeks now, so it's getting close to the game. The sharpness is coming, the fitness is coming and everything is going well.
"It's been strange, you know, because you have to stay two metres apart to talk to your team-mates. Sometimes, you need to get close to give them some signs but now it's two metres and it's kind of strange.
"But this is what we have to do for us to be safe and for the game to go on. We are ready to do it and we're happy to do it. Everybody is looking good. Running, working hard and playing football. Little two-a-sides and doing some ball work.
"Everyone is getting better and better. Everyone is back, even Paul is back training normally and Rashy is back training as normal. Everyone is training normally and training full and all that, so the squad is full and everyone is ready, I think.
"I can't wait for the league to start again. I'm really looking forward to it. We're working hard and I believe we're going to do great."