I didn't work out Tuesday for that very reason, I was not rested.
Rest, at our age, is, or should be, a priority. The number one reason is that we want to avoid injury, but just as important is that out strength comes from the rest and recovery.
It's not the working our that makes me stronger, it's the rest and recovery that makes me stronger. For example, I didn't work out much for two weeks and came back stronger than ever.
I know it sounds a little funny, but if you think about it it does ring true. The strength comes from resting and recovering, not from constantly working out.
I can workout several days in a row and not advance, but when I take a couple of days off, I can advance the weights when I come back.