A tactic that can be employed is RPE. 

RPE quite intuitively provides a means to regulate intensity on-the-fly: the basic concept employed is that of “difficulty in moving the weight.” As the athlete adds weight to the bar for the back squat, the move becomes progressively more difficult, and the athlete works with more intensity, up to maximum possible intensity: the one-rep max (1RM). 

Intensity determines training effect.

So why not just use the 1RM, and Prilepin’s table ( percentages x reps/sets = total volume ), and develop training blocks based on that?

During a training cycle, the typical athlete will not test their 1RM all that frequently; one reason for this might be that it just doesn’t really matter. If the lifter is currently focusing on hypertrophy, and keeping the reps high, it doesn’t matter all that much if she can lift 100lbs for 1 rep; what really matters is how difficult it is to complete that lift for 10 reps, or 15 reps, or 20 reps.

How important is this? 

Well, for a couple sessions, it might not matter. The coach might prescribe (say) deadlifts, 3×3, at 315lbs. The athlete might be tired, run-down, or whatever, and really only capable of pulling 305 lbs for 3×3. So, the athlete doesn’t complete the final set, maybe getting only two reps. Or maybe the athlete slams an extra Monster, does some Nose Tork, and makes the full workout.

The problem is that the athlete has started to dip deeper into their recovery reserves with the latter move; on the other hand, failing to complete a workout is viewed as a failure – perhaps most importantly in the athlete’s mind, but certainly they didn’t get the training effect the coach was hoping to achieve. Again, for a session or two, probably not a big deal. But let this happen frequently enough, and the damage adds up.

This is where RPE comes into play. RPE is specific to the lifter, performing this exercise, at this time. Rather than shooting for a prescribed weight – which we’ve seen might miss the desired intensity – we program for a desired RPE, or level of effort.

One example of this is based upon “reps left in the tank.” 

The following gives us some RPEs and their basic description:
– 6 and below is warm up work – that is, I can increase the bar speed by bringing more force to the bar.

– 7 is “dynamic effort”, where the weight is such that I can maintain bar speed for my set while putting maximal force on the bar, but I can’t increase bar speed.

– 8 means I have 2-3 more reps “in the tank”.

– 9 means I have 1 more rep “in the tank”.

– 10 means no more reps left in the tank.

So, going back to our example: our athlete now has a program which prescribes:
Deadlift: 3 sets of 3 Reps @RPE8
Notice how no weight is prescribed. The athlete is expected to determine working weight by gauging RPE. Typically, an athlete will add weight to the bar in some kind of natural increments: starting at 135, then going to 185, then 225, then 275, and the athlete will then think about what 275 felt like. She might feel like 275 was really easy, she knows she’s hit 315 in the past, and in the past 275 was much harder; she feels adequately warmed up, so she decides to jump to 325 for her work sets.

No more prescribed weights. That’s the first thing to notice about a system employing autoregulation. Instead, an intensity is prescribed, and the athlete is told to use whatever weight is required to develop that intensity. The weights don’t matter; they’re just numbers we use to help gauge our level of intensity.

Patrick Ciera