Burton lost 1-0 to Aldershot in what was their third match in six days, a game too far according to boss Gary Rowett.
Their opponents looked anything but relegation candidates in Tuesday night's League Two clash at the Pirelli as they held onto a fourth-minute lead given to them by on-loan striker Dani Lopez to make it four games unbeaten on the road.
Rowett said: "It's been a punishing schedule for us. I hoped the three days recovery since the Dagenham game on Saturday might be enough, but it clearly wasn't.
"The lads were quiet in the dressing room and we tried to give them a lift, but we didn't play with our usual zest and energy.
"I don't want to take anything away from Aldershot because I thought they worked really hard to capitalise. The early goal didn't help - and it was a poor one to concede from our point of view.
"It was just a long ball down the middle, a flick and the lad just ran in behind us. I don't expect us to concede goals like that because we've defended well all season."