"I think we were probably beaten up physically and in some ways it's going to be a good lesson for us to learn at this point in the season," said the 25-year-old.
"We're not as big a team as some of these bigger teams, so in order for us to get it right we need to get the detail right. That's something that was really emphasised at the weekend.
"We definitely believe within the group we have that we've got enough there to beat these teams, but if we don't get the detail right, we don't have the size and that wasn't there at the weekend. It's certainly something, moving forward, that we're really looking at and wanting to work on but with the group we've got there we've got the players who can do that.
"We've spoken about it this week and as a group we believe that, so that's certainly going to be the aim going forward. You can't win a game of rugby nowadays without being physical, so first and foremost that has to be in place.
"But something Dave's really tried with the tight five and the forwards in general is to add that ball playing ability to our game. I think we saw parts of that last year and hopefully there's more to come.
"One of the big things in training is putting players in pressured situations where they have to make decisions and just get them used to it, because that's all there really is to it. Once you get yourself into situations and you know what to do in those situations, it's only going to transfer on to the pitch."
Ashe has been plagued by injuries over the last couple of years, suffering a particularly frustrating problem last season when an ankle operation took much longer to heal than expected, requiring additional surgery before he could regain full fitness, but he is hoping his luck is due to change.
"Last season was tough," he said.
"I was expecting to be back after 12 weeks with that injury and that obviously wasn't the case, but you just have to accept these things sometimes."