Since December 2nd we've played 32 matches in 110 days, or 15.5 weeks. Not a single week without a midweek fixture.
Now, I couldn't say for sure that no other team in history has ever had a congested fixture list quite like it, maybe they have, but to have that without any pre-season and a shorter-than-everyone-else summer break? That's a unique situation.
You might be sick to death of hearing about it, and it probably does get pedalled around a lot more after a loss, but that doesn't make it any less true. These players are human beings. The reason that Leicester looked so much fresher than we did yesterday is simple. They were much fresher.