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Should You Train To Failure?

If you’ve watched the movie “Pumping Iron” you have probably seen the hardcore, peak intensity training that bodybuilders in the Golden Era went through.

Some of those bodybuilders, like Serge Nubret, swore by the effectiveness of training to failure… On EVERY SET!

And well, the truth is that for most of us, reaching failure on every working set will lead to burnout quite quickly.

This is why it is important to understand this concept and learn how to integrate it in your training regimen properly - if at all.

So let’s dive straight into this and discuss training to failure...

The Intensity Factor

In sports science and weight training, intensity measures how close you get to your maximum strength capabilities.

To put it simply, the heavier the weight you lift, the higher the intensity, meaning that technically, your one rep max (1RM) represents 100% intensity for you on a given exercise.

For example, if you can bench press 100 kg for one single rep, and fail to do a second rep unassisted, 100 kg is 100% intensity for you on the bench press.

Muscle Activation

One of the more important things to remember is that the heavier you lift, the more fast-twitch muscle fibres are activated.

Fast-twitch fibres are the stronger, more powerful muscle fibres, which can exert great amounts of force, explosively.

However, fibre recruitment is the primary means of lifting heavier, only up until ~80% of your maximum strength capabilities (intensity).

Going above 85% and until failure is only possible with an increased frequency of brain to muscle signals.

What Does This Mean For Me?

With this information in mind, it is quite clear that training to failure is way more strenuous for the nervous system.

Nevertheless, reaching muscular failure is quite a powerful stimulus as well, but due to its strenuous nature, it should be properly implemented into your routine.

Generally, you should test around muscle failure, by only taking 1 set for each muscle group to failure, per week and working up from there.

If you go overboard with failure, you will experience:

  1. Joint/ligament aches

  2. Prolonged muscle exhaustion

  3. Lowered strength capabilities

Monitor those and adjust the volume of failure sets in your training split accordingly!

Failure And Muscle Growth

Some of the legends like Arnold & Serge can sell you on the idea that reaching failure is ESSENTIAL.

However, modern studies suggest that staying 2-5 repetitions shy of failure is more beneficial for muscle growth, than training to failure - this is known as Reps in Reserve (RIR).

Nevertheless, each and everyone reacts differently to certain stimuli, so your best bet is to, again, test around!

Carefully managing your training intensity will allow you to optimize your quality training volume in the long-term, thus creating a better stimulus and maximizing gains.

Improper implementation of training to failure can prevent this from happening, due to its innate ability to, well, fry your nervous system!

This is why, your main means of creating greater stimulus, should be to follow a broader range of Progressive Overload options: either increase training weight (resistance) over time, increase the number of repetitions and/or sets (volume) over time, increase the regularity of how often a muscle group is trained per week (frequency), adjusting rest periods between sets (recovery); or slowing down the eccentric and/or concentric motion of each rep (time under tension) by way of strict movement control.

Only when you have ALL of these covered, you should consider implementing sets to failure, in which case, you can start with just one set and see how far you can take it.

Even then, 'failure' can be subjective and there will be days that your mind will give up way before you body does.


Everyone wants to train in the most optimal way to achieve the most effective results in the shortest amount of time. So we often look for 'secret hacks' - training to failure is often seen as one of these golden rules....but it is not for everyone and if it is to be implemented, it needs to be done so with very careful consideration and time to fully understand what our bodies (and more so, our minds) are capable of.

As we get older, this becomes even more important, as putting our bodies under excessive undue pressure may not be a sure-fire way to faster gains - but a recipe for injury and long term layoffs that would put us further behind..!!

The key??

Train smarter, not harder!

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