"I'll also find a week's worth of rations for him!" With someone taking the lead, many people agreed with him.
The most torturous part of that phase of closed-door training was the excessive amount of training during the day and the fact that, after the training, one had to go to the mountains to find food and water if one wanted to eat or drink. It was possible to find dried rations and water that were hidden everywhere in the mountains.
They did not have to search for water all over the mountains because there was a mountain spring there. Even if it was raining in the mountains, the spring water was still very clear. However, they had to search for the rations all over the mountains and ridges. Otherwise, one would be so hungry that one would not have the strength to train the next day.