The former Crewe Alexandra midfielder moved to Villa last summer.
"The training at Villa is unbelievable. That's the big thing I have noticed coming from Crewe," said Westwood.
"The training is so sharp and if you're not on it every day in training you get found out. The drills are fantastic, so enjoyable to be part of it.
"It's all sharp, snappy stuff - one and two touch - that suits me down to the ground - working on possession. It's fantastic."