GB team walker Tom Bosworth criticized the conditions athletes face in Sapporo, the city that hosts the Olympic Games distance races.
The 50 km marathon and walk are being held there, 800 km north of Tokyo, due to fears about the heat.
Bosworth complained on Twitter about conditions in Sapporo and also about the quality of the food served to the athletes.
In a now deleted tweet he wrote: “Hey IOC media – do you know the millions of money you make with the Olympics?
“Is there any chance in the week of our race that we could get some food?” Do you like meals?
“No cold slop, steamed onions or partially cooked pasta?” It is the “pinnacle of sport”.
“Sapporo looks like a prison. Welcome to the sweaty school dining room that a life of hard work brings.
He followed that up with a message that read, “Re the food here in Sapporo.
“The food is bad. The food is cold. And seems in short supply.
“The athletes fought hard to get to these games and abide by all the rules in place.
“I am very grateful that they have gone ahead and I have had + ve experience so far and that is why I called it.”
Bosworth will compete in the 50k walk on Friday.