High temperatures have forced Twell to change her training routine
Steph Twell's coach Mick Woods has questioned the choice of Portugal as the Great Britain training camp ahead of the World Championships in Berlin.
Aldershot runner Twell is preparing, with Woods, for the 1500 metres.
Woods told BBC Surrey: "The weather isn't good for endurance athletes. With temperatures 30 degrees plus, to try and train is very difficult.
"I wouldn't have come here for final preparation by choice. It would've been better for us to have stayed at home."
He added: "Acclimatisation is important, but technically there shouldn't be any needed for Berlin as it wouldn't be anything like as hot."
Woods understands UK Athletics want the team to spend time bonding.
"Part and parcel of any team spirit is to be in the same place and be part of the team process," he said.
"That's obviously why they want to do it, and being in an environment where there is less media attention and family attention".
Twell admits it has been hard in Portugal: "The last few days have been very hot, and a lot more recovery for my body.
"You have to adapt a bit more," she added. "And that is more stressful. I was a little bit sceptical, but I do see the pluses, being here in a team. Everyone's getting excited."