If you were to do 3x5 with RPE 9 across sets would you still recommend a 5min rest between sets? Thanks.
Yes. You could also rest less and still do 3x5 @ 9, but you’d likely take weight off the bar due to fatigue. I wouldn’t extend rest periods past 5 minutes though.
I generally rest for shorter that 5 minute periods between sets, in part based on the theory that shorter rest periods cause a favorable adaptation - getting more efficient at recovery.
I’ve usually rest about 2 minutes between upper body sets and 3 minutes between lower body sets, the difference because upper body work is less fatiguing.
Does this make sense?