Reps in Reserve (RIR): How Sets of 10 is Sabotaging Your Gains

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anabolic_geek

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The Problem With Fixed Rep Numbers (or going to failure)​

So, we all know that progressive overload is the ticket to gains, right? You increase weight, increase volume and increase intensity and, with the right diet (and ‘supplements’ heh) your muscles get bigger and stronger.

One of the big problems with this is that we have no way to easily gauge intensity. Some people will just sit down and do their sets and reps. Some people will progress the number of reps and sets. Or maybe they’ll cut down the rest time. Either way, this isn’t a very efficient way to train unless you’re sitting there with a stopwatch each workout – how will you know that you’ve progressed?

There’s another problem hiding in there too: individual variation from day to day. Sometimes, you hit the gym and you feel almost invincible like you could lift half the gym and simply triple your weight. But some days, you feel like skipping the whole workout and going straight to the sauna.What do I want to say with that? Well, your body fluctuates. Because days are different. Some days you get too little sleep, food, you are stressed, you name it. However, this also means that your estimated 1 RM value fluctuates in each session.

So it could be, that one day, you can easily do 8 reps with 80% 1 RM. The next day you didn’t get as much sleep and food, and you’ll only be able to do 7 reps. And that’s where the Reps in the Reserve system provides a ways better solution for you. This does not mean that a system based on percentages is completely useless. It certainly is not, but it has its limitations in accuracy. Because it is a set number that does not adjust to your body’s condition.

Fatigue management is another common issue bodybuilders and powerlifters face. If you’re like most bros, you’ve had it drilled into your head by the likes of Arnold Schwarzenegger that if you’re not taking every set to absolute failure then you won’t grow. First, not only is this completely false but it doesn’t leave any room whatsoever for intensity progression. Furthermore, if you keep boosting the volume week after week, sooner or later you’ll get to the point where all those sets to failure will start to catch up with you – leading to issues like problems late in the session, inability to exercise a given fatigued body part 2 or 3 days later and it’s also REALLY hard on your nervous system.

And this is why autoregulation like reps in reserve is so important. When you aim at 2 reps left in the tank you simply do a set of 8 on a day you feel great, and a set of 6 or 7 when you feel a bit off. The most important is that you constantly apply the principle of progressive overload. Increase weights or reps in reserve from week-to-week and you will see great progress. An example could be starting in Week 1 with reps in reserve 5 and progressing over 5 weeks to reps in reserve 0 and then you take a deload. It’s that simple.

Don’t let set numbers dictate your workout. this will not only stall progress but also higher the chance of you actually hurting yourself in the gym. I often see people forcing themselves to get back to their PR from the last workout. Don’t be that guy.

Where does RIR come from?​

Rate of Perceived Exertion (RPE) was a concept initially developed by Gunnar Borg to quantify perceived exertion of (conditioning) exercise. The original scale was based on heart rate (60 to 200bpm → RPE 6 to 20). This scale evolved to the now commonly used 1 to 10 scale which is based on a subjective perception of exertion (we use this scale in TTP conditioning sessions periodically for similar reasons we use RPE/RIR in lifting).

Mike Tuchscherer introduced and modified this scale for use in powerlifting. Here, the RPE represents how many more repetitions you believe you could do before reaching failure within a set. Reps In Reserve (RIR) is simply a variation of this concept (with the well validated upside of being more intuitive).

RPE 8 and 2 RIR are (for our purposes) the same thing. In fact, the prescription of “RPE 8 (2 RIR)” that we sometimes use, can be seen as a bit redundant (as it’s saying the same thing twice) and is interchangeable with AHAFA (2 RIR) = As Heavy As Form Allows (2 Repetitions in Reserve).

What does RIR (Reps In Reserve) really mean?​

RIR means “Reps in Reserve” = how many more reps could you do before failure (technical failure OR actually missing a lift). For our purposes, we use RIR in reference to technical failure (i.e. the most reps you could do with good form).

3+ RIR (or RPE < 7) = More than 3 Reps In Reserve = more than 3 repetitions away from (technical) failure
3 RIR (or RPE 7) = 3 Reps In Reserve = 3 repetitions away from failure
2 RIR (or RPE 8) = 2 Reps In Reserve = 2 repetitions away from failure
1 RIR (or RPE 9) = 1 Rep In Reserve = 1 repetitions away from failure
0 RIR (or RPE 10) = 0 Reps In Reserve = 0 repetitions away from failure/max effort

Why do we use RIR?​

We know that training close to failure is important for strength development and muscle hypertrophy (“Hard training is smart training”). Whereas staying further away from failure can be useful for getting used to a new movement or to develop power.

RIR gives you an opportunity to personalize the prescription in each session to meet your demands. Due to differences in preparedness (general strength levels, technique and experience), daily readiness (recovery status) and neuromuscular efficiency, there can be big differences between athletes on how hard a given %1RM is going to be in a given training session.

RIR is also useful when you don’t know your 1RM for a given lift (if you haven’t tested it for a while or it’s a movement, such as “single arm DB row”, where testing 1RM isn’t meaningful or safe).

Most importantly, RIR gives us a structured way to teach you how to train hard (while keeping effort appropriate to the stimulus we’re looking for), and train smart (to auto-regulate by adjusting your training to your current level and daily readiness, influenced by stress levels, sleep, nutrition, overall training volume, recovery practices etc.).

What are the disadvantages of Reps in Reserve?​

There are definitely disadvantages, but the good thing is that you can work on them. The better your lifting skills are, longer you go to the gym, and of course the longer you use the reps in reserve system, the better you will be in assessing RIR during an exercise or a workout. But there are some things you need to take care of.

Your Mindset​

Some lifter (me included) love to go balls to the wall. that often happens when working out with a new gym buddy. You squeeze out the last rep but note down a rep in reserve of 2. So if you are like me and you tend to overestimate yourself, stop it. You don’t need to show off and you want to progress.

However, the opposite also exists. Some people overthink the whole RPE and RIR thing. They spend hours at home calculating sets and reps but end up under assessing their own skills because they are scared of overtraining. Also, these people leave gains on the streets.

As always, balance is key. Be honest about your effort, but don’t overcomplicate it.

Low Intensities are Hard to Assess​

For bodybuilders and powerlifters reps in reserve are a great measure. The problem is, as soon as you want reps in reserve of higher than 5, estimation becomes difficult. Because many people (me included) will not be able to state the difference between an RIR of 6 and an RIR of 7.

If you want to go that low in intensity, don’t use Reps in Reserve.

How to read the RIR prescriptions?​

All the RIR examples are based on weights you could lift today (based on your daily readiness), not on what you think you “should” be able to lift or what you might have lifted sometime in the past.

1. Back squat - 5 x 5 @ 2 RIR on 1st set (80-85%)

= Do the 1st set at a weight between 80 and 85% of your 1RM that you could do seven (7) repetitions with (5 + 2 RIR).

Then, based on how the 1st set went (how good an estimate of 2 RIR it was), you can either
  • stay at the same weight (if the set was @ 2 RIR)
  • move up on weight (if the set was easier than 2 RIR)
  • move down on weight (if the set was harder than 2 RIR)
As long as you were within your target range, you can count the 1st set even if it was easier than 2 RIR. The remaining sets might become harder than 2 RIR (as you accumulate fatigue) but should not be to failure.

2. Back squat - 5 x 5 @ 1-2 RIR (80-85%)

(this is very similar to the above example, the only difference is a more specific RIR range)

= Do the 1st set at a weight between 80 and 85% of your 1RM that you could do 6-7 repetitions with (5 + 1-2 RIR). Considering this is 25 total reps, it is likely a smarter choice to do the 1st set @ 2 RIR then work up to @ 1 RIR through the remaining sets.

3. Back squat - 5 x 5 @ 2 RIR or 2 RIR on all sets (80-85%)

= Do all the sets at a weight between 80 and 85% of your 1RM that you could do seven (7) repetitions with (5 + 2 RIR).

Based on how each set goes, you might need to move up and/or down within the % range to meet the 2 RIR on the remaining sets.

4. Back squat - 3 x 5 @ 3+ RIR all sets (70%)

= Do all the sets at 70% of your 1RM and should be at a weight you feel like you could do for more than eight (8+) repetitions.

“+”/AMAP (As Many As Possible) sets and RIR​

1. Strict pull up - 3 x AMAP (1-2 RIR)

= Do as many pull-ups as you can while staying 1 - 2 repetitions away from failure on each set

2. Deadlift - 1 x 3+ (2 RIR)

= Do a set of more than 3 deadlifts while staying 2 repetitions away from failure.

What if my RIR doesn’t fit within the prescribed (Rx) % range?​

The % ranges we use are designed to match the assigned RIRs for most athlete’s. However, It is completely possible that, relative to you and your daily readiness, the Rx % range is lighter or heavier than the RIR allows. In this case, you should adjust the weight to match the RIR, rather than forcing yourself to stick with the %s. When this happens, consider the following:
  • If you’re having a great day and are able to go much heavier than the assigned %s, look at the training week as a whole to avoid digging yourself into too deep of a hole (reach out to us if in doubt) in a single session.
  • If you need to go much lighter than assigned %s, consider that you might not be recovering well from your training. Check that your sleep and nutrition are in good enough to recover. If you run into this problem more than once, reach out to us and we can work it out together.

This is hard, I’m not sure how many more reps I could do​

Good.

You’re here to grow and we are here to guide you. The struggle is an integral part of the process. With deliberate practice and by paying attention, you will develop your awareness of how close to failure you are. As you get better at auto-regulation of your training, you will be rewarded with better results.

Can’t you just tell me exactly what weight/percentage (%) to do?​

I could, AND here’s why I think it would be a mistake:
  1. You would learn less about yourself and training. Helping you develop self-awareness and ability to “auto-regulate” (adjust training to you and your daily readiness) is important to us as I want you to be(come) a thoughtful, independent athlete.
  2. I would be more likely to get the prescription “wrong” (or let’s say “less right”) without the use of RIR (or RPE). Using RIR makes the program adaptable and more personal to you.

Conclusion​

As you can see, reps in reserve are not that complicated and can easily be incorporated in your workout. Even if you don’t have years of training under your belt.

However, the more advanced you are, the sooner you should use it. That does not mean that RIR is a must use for all athletes, but especially for isolation exercises reps in reserve are a great tool.

By setting limits to how close you are to failure, you move enough weight to stimulate muscle growth and strength gains, while the minimizing risk of injury and limiting your total systemic fatigue.

The bottom line is that Reps in Reserve can truly take your lifting career to the next level. Maybe it may seem a bit hard at first, but with time comes the perfection. Trust me, you need to get used to reps in reserve at first, but after a while, you wouldn’t want to go back. It’s simple, yet effective.

 
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Looks like a good write up, I used to do a lot of RPE based training, however for me there is too much self regulation and when I was getting ready for comps I would want to hit numbers at RPE’s of 8 and 9 always, no bueno on the CNS… I’ll def be reading this
 
So I read into this but its not like I train at all im not a true bber im not going for the stage and use lighter weight higher reps due to injuries.
My progression is through hitting a certain amount of reps with a weight than move forward lowering reps and raising weight. Than repeat the reps in reserve I believe wouldn’t be applied to the way I train this sounds more like something were a person is lifting as heavy as possible and can’t always hit that heavy weight reps they could last time or the time before this to me shows that there pushing weight up to quickly you get better growth with slow and steady progress. If you’re powerlifting I believe that this could definitely be useful.
I can see taking 1 rep away and adding one to the next time you train that muscle or muscle group would start to put you behind but you can’t always go to failure or you won’t be lifting long without an injury. I say push it but it’s called failure because eventually something is going to fail lol
Different styles of training might not work with this training program but I can definitely see others really benefiting from this to avoid injuries.
 
I base my sets and reps on a study I recently read that convinced me that ten sets per week per bodypart/exercise is the minimum necessary to grow, and that beyond 20 sets, you are just exhausting yourself. So I tend to do a warm up set for 10 reps, then either 5x3 or 5x5, depending on whether I’m going heavy, then do a concluding set at warm up weight or 5-10 lbs. above it for 10 reps or as close to that as I can get. Then making sure you do that routine at least twice a week for each bodypart/exercise should promote anabolism, as that is 14 sets, with ten of them being core work sets. I find that if I try to become more analytical than that, I get distracted and don’t get as much out of the workout. Just my $.02.
 
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Perhaps that’s true, but I would counter that RPE/RIR has tons of science backing it up.
  1. Borg G. Perceived exertion as an indicator of somatic stress. Scand j rehabil med. 1970;2:92-8.
  2. Borg GA. Psychophysical bases of perceived exertion. Med sci sports exerc. 1982 Jan 1;14(5):377-81.
  3. Hackett DA, Johnson NA, Halaki M, Chow CM. A novel scale to assess resistance-exercise effort. Journal of sports sciences. 2012 Sep 1;30(13):1405-13.
  4. Tuchscherer M. The Reactive Training Manual: Developing your own custom training program for powerlifting. Reactive Training Systems. 2008;15.
  5. Zourdos MC, Klemp A, Dolan C, Quiles JM, Schau KA, Jo E, Helms E, Esgro B, Duncan S, Merino SG, Blanco R. Novel resistance training–specific rating of perceived exertion scale measuring repetitions in reserve. The Journal of Strength & Conditioning Research. 2016 Jan 1;30(1):267-75.
  6. Foster C, Florhaug JA, Franklin J, Gottschall L, Hrovatin LA, Parker S, Doleshal P, Dodge C. A new approach to monitoring exercise training. The Journal of Strength & Conditioning Research. 2001 Feb 1;15(1):109-15.
  7. Ormsbee MJ, Carzoli JP, Klemp A, Allman BR, Zourdos MC, Kim JS, Panton LB. Efficacy of the repetitions in reserve-based rating of perceived exertion for the bench press in experienced and novice benchers. The Journal of Strength & Conditioning Research. 2019 Feb 1;33(2):337-45.
  8. Helms ER, Byrnes RK, Cooke DM, Haischer MH, Carzoli JP, Johnson TK, Cross MR, Cronin JB, Storey AG, Zourdos MC. RPE vs. Percentage 1RM loading in periodized programs matched for sets and repetitions. Frontiers in physiology. 2018 Mar 21;9:247.
  9. Graham T, Cleather DJ. Autoregulation by" Repetitions in Reserve" Leads to Greater Improvements in Strength Over a 12-Week Training Program Than Fixed Loading. Journal of strength and conditioning research. 2019 Apr.
  10. Cooke DM, Haischer MH, Carzoli JP, Bazyler CD, Johnson TK, Varieur R, Zoeller RF, Whitehurst M, Zourdos MC. Body Mass and Femur Length Are Inversely Related to Repetitions Performed in the Back Squat in Well-Trained Lifters. The Journal of Strength & Conditioning Research. 2019 Mar 1;33(3):890-5.
  11. Zourdos MC, Goldsmith JA, Helms ER, Trepeck C, Halle JL, Mendez KM, Cooke DM, Haischer MH, Sousa CA, Klemp A, Byrnes RK. Proximity to Failure and Total Repetitions Performed in a Set Influences Accuracy of Intraset Repetitions in Reserve-Based Rating of Perceived Exertion. Journal of strength and conditioning research. 2019 Feb.
  12. Pareja‐Blanco F, Rodríguez‐Rosell D, Sánchez‐Medina L, Sanchis‐Moysi J, Dorado C, Mora‐Custodio R, Yáñez‐García JM, Morales‐Alamo D, Pérez‐Suárez I, Calbet JA, González‐Badillo JJ. Effects of velocity loss during resistance training on athletic performance, strength gains and muscle adaptations. Scandinavian journal of medicine & science in sports. 2017 Jul;27(7):724-35.
  13. Pareja-Blanco F, Rodríguez-Rosell D, Aagaard P, Sánchez-Medina L, Ribas-Serna J, Mora-Custodio R, Otero-Esquina C, Yáñez-García JM, González-Badillo JJ. Time Course of Recovery From Resistance Exercise With Different Set Configurations. Journal of strength and conditioning research. 2018 Jul.
  14. Zourdos MC, Dolan C, Quiles JM, Klemp A, Jo E, Loenneke JP, Blanco R, Whitehurst M. Efficacy of daily one-repetition maximum training in well-trained powerlifters and weightlifters: a case series. Nutrición Hospitalaria. 2016;33(2):437-43.
  15. Sousa CA. Assessment of Accuracy of Intra-set Rating of Perceived Exertion in the Squat, Bench Press, and Deadlift (Doctoral dissertation, Florida Atlantic University).
These citations were taken from an article talking about RPE/RIR in MASS. Based on these citations they conclude:
  1. RPE is just one of many tools to implement the concept of autoregulation. In its most basic form, RPE can be utilized to prescribe daily training load, which takes into account the limitations of percentages such as daily readiness and the large between-lifter variation in reps that can be performed at a given percentage of 1RM.
  2. Although RPE is most commonly used to prescribe load (i.e. 3 sets of 5 at 7-9 RPE) it can also be used to autoregulate volume (RPE Stops), program assistance work, progress weekly load, sets, or reps, and simply be used to track progress over time. The utility of RPE is widespread and not limited to the narrow box we usually put it in.
  3. The common critique that RPE is subjective, and thus not perfectly accurate, is correct. However, the point isn’t to always be perfectly accurate. Further, using RPE to predict RIR is quite accurate, based upon the existing literature, during low-rep and high-intensity sets, which is when accuracy is most important.
And keep in mind, this is written by people who do literally nothing except lift and read research papers on getting big and strong.
 
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Not sure if that’s directed at me or more generally. I have no doubt that there is a lot of analytical support for reps in reserve training. Not disputing that at all. I’ve just farted my way through roughly 45 years of weight training and landed on a sequence that works for me.
 
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