Hard was an understatement.

While Xander was keeping up better then he expected, after an hour or so of working with Spike, he was tired and sweaty and in desperate need a drink. After calling a time out, he moved to one of the trees nearby and uncovered two soda bottles filled with water. Flopping down under the shade of the same tree, he held out the other bottle to Spike as he took a drink from his, staying quiet for once as he drank and caught his breath.