A depleted Liverpool side suffered yet another injury, with James Milner forced off with a hamstring problem.
And Henderson says it is no coincidence that a lot of teams have suffered with fitness issues.
He said: “The players have started a month later and are playing in all the competitions. It’s no coincidence there are a lot of injuries.
“It is hard but I don’t think it’s going to change. You just have to get on with it. It is difficult. Just have to keep going.