Are you wearing a chest strap HRM, and why back to 140bpm? Are you compressing time? That just seems high for recovery to me, just curious.
Yep - good questions!
I wear a polar H-10 chest strap.
The snatch protocol I'm working with calls for the 'next set' to start when you can pass a talk test. My preference / experiment is to recover to my "Maff HR" as measured by the H-10 chest strap.
Typically Maffetone HR is calculated as 180-age. For me this would now be 136 bpm, but according to Dr. Phil Maffetone's website the are some additional considerations which may shift that target HR number up or down.
The MAF 180 Formula: Heart-rate monitoring for real aerobic training.
Based on my history (aerobic base) as a decent middle distance runner in my 20's and 30's, testing data that indicates my max HR is about 10 bpm higher than my 220-age, my consistent KB training over the last 6 years, and that -for me- passing a talk test roughly aligns to 140 bpm, I felt I was justified in setting my recovery target to 140 bpm.
With regard to making progress in MAF tests as a condition to keep the +5 (+4 in my case), I'm using week to week snatch and swings times as an assessment. As long as the time it takes me to complete my sets is generally decreasing (or at least not 'significantly' increasing beyond what could be anticipated for variation in sleep, nutrition, load from other programming stress, life stress, etc.) I consider this progress in my MAF Tests and I keep the +4.
Thanks for asking! Right, or wrong I'm more than happy to discuss.