This is something I have been thinking over for some considerable time. I believe that almost all martial arts training systems exist on a spectrum from ‘fast burn’ to ‘slow burn’.
Bear in mind that when boiled down to their absolute basic reasons for existence, all martial arts are about solving the same problem – protection/reaction against human physical aggression.
At its extreme end on the spectrum ‘fast burn’ comes out of the need for rapid effectiveness over a very short period of training time.
A good example might be the unarmed combat training at a military academy .
There are many advantages to the ‘fast burn’ approach. A slimmed down curriculum gives a more condensed focus on a few key techniques.
As an example of this; I once read an account of a Japanese Wado teacher who had been brought into a wartime military academy to teach karate to elite troops. Very early on he realised that it was impossible to train the troops like he’d been trained and was used to teaching, mainly because he had so little time with them before they were deployed to the battlefield or be dropped behind enemy lines. So, he trimmed his teaching down to just a handful of techniques and worked them really hard to become exceptionally good at those few things that may help them to survive a hand-to-hand encounter.
Another positive aspect of ‘fast burn’ relates to an individual’s physical peak. If you accept the idea that human physicality, (athleticism) in its rawest form rises steadily towards an apex, and then, just as steadily starts to decline, then, if the ‘fast burn’ training curriculum meshes with that rise and enhances the potential of the trainee, that has to be a good thing.
In ‘fast burn’ training, specialism can become a strength. This specialist skill-set might be in a particular zone, like ground fighting and grappling, or systems that specialise in kicking skills.
The down side.
However, over-specialisation can severely limit your ability to get yourself out of a tight spot, particularly where you have to be flexible in your options. Add to that the possibility that displaying your specialism may also reveal your weaknesses to a canny opponent.
It has to be said that a limited number of techniques whose training objectives are just based upon ‘harder’, ‘faster’, ‘stronger’ may suffer from the boredom factor, but, by definition, as ‘fast burn’ systems they may well top-out before boredom kicks in and just quit training altogether. They may well be the physical example of what the motor industry would call ‘built-in obsolescence’. 
Not that a martial art should be judged by its level of variety.
As a footnote; it is a known fact that in some traditional Japanese Budo systems students were charged by the number of techniques presented to them, so it was in the master’s interest to pile on a growing catalogue of techniques. I am not saying this was standard practice, but it certainly existed.
Turning my attention now to ‘slow burn’.
By definition ‘slow burn’ martial arts systems develop their efficiency over a very long time, or perhaps time as a measure is misleading? Maybe it would be better to describe the work needed to become a master of a ‘slow burn’ system as prolonged and arduous, perhaps beyond the bounds of most individuals.
For me ‘slow burn’ is defined by its complexity and sophistication and is associated with systems that have demanding levels of study, probably involving insane amounts of gruelling and boring repetitions that would test the ability (or willingness) of the average person to endure.
The positive side.
The up-side of this methodology is difficult to map as so few individuals ever get to the level of mastery and all we are left with are martial arts myths, but it would be foolish to dismiss it on these grounds alone. Most myths contain a kernel of truth and if a fraction of the myths told can be effectively proved or verified then really, there is no smoke without fire.
Looked at through the lens of modern sporting achievement, I think we can all appreciate that with the very best elite sportspeople uncanny abilities can be observed, and we know that despite the fact that many of them are blessed with unique genetic and physical disposition, an insane amount of work goes on to achieve these lofty heights (I am thinking of examples in tennis or golf, but really it applies to any top-level human endeavour – think of musicians!).
‘Slow burn’ martial arts systems may not comply with modern sports science used by elite athletes, but they were getting results any way, probably from a form of proto-sports science developed through generations of trial and error.
The ‘slow burn’ systems seem to be characterised by a reprogramming of the body in ways that require great subtlety, so subtle in fact that the practitioner struggles to comprehend the working of it even within their own bodies; it works by revelation and is holistic in nature. Mind and cognition are major components. The determination and grit that fuel the ‘fast burn’ systems are not enough to make ‘slow burn’ work, something more is needed; a reframing and reconfiguring of what we think we are doing.
The weaknesses of the ‘slow burn’ systems are pretty obvious.
Who has the time or patience to involve themselves in this level of prolonged study? It certainly doesn’t easily mesh with the demands of modern living; an awful lot of sacrifices would need to be made. It is no exaggeration to say that you would have to live your life as a kind of martial arts monk, casting aside comforts and ambitions outside of martial arts training. I often wonder how it was achieved in the historical past; I guess that beyond just living and surviving they had less distractions on their time than we do now. .
We know something of these systems because we can observe how, over time, the surviving examples had a tendency to morph into something altogether different; often taking on a new and reformed purpose, which of course improved their survival rate.
The examples I am thinking of have reinvented themselves as either health preserving exercise or semi-spiritual arbiters of love peace and harmony; all positive objectives in themselves and certainly not something we need less of in these current times.
I am going to duck that particular argument; it is not a rabbit hole I am keen to go down in this current discussion.
‘Slow burn’ dances with the devil when it too eagerly embraces its own mythologies; but in the absence of people who can really ‘do it’ what else have they got left? What always intrigues me is that the luminaries of the current crop of ‘slow burn’ masters are so reluctant to have their skills empirically tested. 
It is tempting, but it would be wrong to play these two extremes of the spectrum off against each other; I have deliberately focussed on the polar opposites, but it’s not ‘one or the other’, there are martial arts systems that are scattered along the continuum between these two extremes, and then there are others that have become lost in the weeds and suffer from a kind of identity crisis; aspiring to ‘slow burn’ mythologies while employing solely ‘fast burn’ methodologies. Can a man truly serve two masters? Or is the wisest thing to do to step back and ask some really searching questions? What is this really all about?
And, as this is a Wado blog, where does Wado fit in all this? I’m not so sure that the image of the line or spectrum between the two polar opposite helps us. I suppose it comes down to the vision and understanding of those who teach it – certainly there is a salutary warning illustrated by the weaknesses of both ‘Fast and Slow burn’.
Perhaps the ‘Fast Burn Slow Burn’ theory can be looked at through another lens, particularly as it relates to Wado?
For example, there is the Omote/Ura viewpoint.
In some older forms of Japanese Budo/Bujutsu you have the ‘Omote’ aspect – ‘Omote’ suggests ‘exterior’, think of it like your shopfront. But there is also an ‘Ura’ dimension, an insider knowledge, the reverse of the shopfront, more like, ‘under the counter’, ‘what’s kept in the back room’, not for the eyes of the hoi polloi. The Ura is the refined aspect of the system.
I have heard this spoken about by certain Japanese Wado Sensei, and I have seen specific aspects of what are referred to as ‘Ura waza’, but these seem to range from the more simple hidden implications of techniques, to the seemingly rarefied, esoteric dimension; fogged by oblique references and maddening vagaries, to me they seem like pebbles dropped in a pond, hints rather than concrete actualities.
This of course begs the question; what is the real story of the current iterations of Wado as we know it? I will leave that for you to make your mind up about.
Maybe Wado is about layers?
If we return to the original statement, “…all martial arts are about solving the same problem – protection/reaction against human physical aggression”. Ideally the success of the system should be judged by that particular measure, but clearly there is a problem with this, in that empirical data is virtually impossible to find. So how do most people create their own way of judging what is successful and efficient and what isn’t? All we are left with is opinion, which tends to be qualitative rather than quantitative. .
Let me throw this one in and risk sabotaging my own theory.
To further complicate things; a good friend of mine is a practitioner of a form of traditional Japanese Budo that that arguably and unashamedly has only one single technique in its syllabus! Yes, only one! My friend is now over 70 years old and has been practising his particular art for most of his adult life. I doubt that for one minute he would consider what he does as ‘fast burn’. I will leave you to work out what his system is, but it is no minor activity, (it is reputed to have over 500,000 practitioners worldwide!)
 I recently read a comment from an ex-military person who said that relying on unarmed combat in a military situation was ‘an indication that you’d f***ed up’. He said that military personnel relied on their weaponry, if you lost that you were extremely compromised. Also, he added that military personnel worked as a unit and that it is unlikely that a solo unarmed combat scenario would happen. Of course, we know that there are outliers and odd exceptions, but, as a rule… well, it’s not my opinion, it’s his.
After seeing the recent demonstration by North Korean ‘special forces’ in front of their ‘glorious leader’, basically the usual rubbish that you see from the ‘Essential Fakir Handbook’, you have to wonder who these people are kidding? https://www.youtube.com/watch?v=Pv3L2knNodU
It’s just an opinion; not necessarily my opinion; other opinions are available.
 ‘Built-in Obsolescence’ Collins Dictionary definition = “the policy of deliberately limiting the life of a product in order to encourage the purchaser to replace it”.
 The sons and inheritors of the Tai Chi tradition of Yang Lu-ch’an (1799 – 1872) initially struggled to live up to their father’s punishing and prolonged training regime; Yang Pan-hou (1837 – 1892) tried to run away from home and his brother Yang Chien-hou (1839 – 1917) attempted suicide!
‘Tai-chi Touchstones – Yang Family Secret Transmissions’ Wile D. 1983.
 There was a ‘Fight Science’ documentary a few years back which looked at the claims of ‘slow burn’ martial systems and it didn’t come out well. The ‘master’ of the system was actually in very weak physical shape (largely due to smoking) although he had some well-organised physical moves and coordinated his operating system well. The truth was, he was a not the best of advocates, and for it to be truly scientific it needed many more contributors.
 I have another blog post planned on this theme. I fear it might ruffle a few feathers though.