Back when I used to watch football, the commentators would often compliment a player by mentioning that he had a short memory. They did not mean that the player in question had short-term memory loss (although that’s also a possibility, given the results of concussions); they meant that when he made a mistake, he forgot about it and moved on to the next play.
We need to have a short memory sometimes when we’re working out. We need to forget what we did ten years ago. We need to let go of the fear from that time we got injured. We need to have amnesia about last week’s romance with the couch.
We work out in the present, with today’s body and today’s capabilities. When we can focus in on one rep at a time, we learn and we grow. We can forget all that other stuff, at least for our time at the gym.