Today I ran a personal best at the Reading half marathon (hooray)… by 20 seconds (oh) which equates to just over a second a mile (erm…) and that has made me think about running, diminishing returns and what it takes to continue to improve.
A couple of weeks ago a compatriot and training partner ran his first race after months of injury and set a new personal best. However when he replied to my text asking how the race had gone, he did so without mentioning the new benchmark (which of course I knew, but I was hoping he’d mention it). And he said he was a bit disappointed. I must admit that I felt like sending an admonishing text back saying that he should be bloody pleased with a PB, but I think I knew, deep in my heart, what was going on. I will explain.
In really simple terms (‘cause I’m a simple guy) the law of diminishing returns states that if you continue to add more resources to a process there will be an initial increasing return that, as more resources is added, will start to tail off. That is not to say that the addition of resources will result in a fall in output (that is known as negative returns) but the rate of returns will start to flatten. A common example given is that of people building a car – add more people to the process and you’ll get more cars. But continue to add more people and you will still get more cars, but not at a proportional rate.
If you apply this to running, it means (to me anyway) that if you add more training you should continue to get faster but at a decreasing rate. Most novice runners – me included – take massive chunks of time off every time they race. This could due to be a number of factors:
- fitness increases
- experience increases
- running economy increases
However as the runner races more, each beneficial factor has a less magnificent impact until we are scrabbling around for seconds here and there.
Now I recognise that almost every factor in racing is non-linear – we are not machines after all – and that it is impossible to apply this type of model to human behaviour, the effect of the weather, the impact of illness, etc but I believe that every runner will acknowledge that running is like ‘bungee running’…
Bungee running? I hear you ask. Last year at a festival in central London, my fiancée and I saw a bungee running sideshow – an inflatable tunnel where people are tied to a bungee cord at the open end and try to run up the tunnel to snatch a prize at the other end. The initial few meters are easy (in a running analogy this is the first few races that a novice enters) with little resistance to forward momentum but as the bungee runner reaches the furthest extent of the cord, the effort needed to go further (in our running analogy to achieve a personal best) increases… until they are flung backwards to the open end of the tunnel, exhausted and defeated. Nice.
But there is something on our side. Something that started being discussed in the GB cycling squad and (surprise, surprise after their results in the Beijing Olympics) made it into the lexicon of the then Prime Minister, Gordon Brown; the aggregation of marginal gains. It is beautifully described here and essentially is the process whereby everything that could possibly have an impact on an outcome is systematically questioned and improved, if only by 1%. This, my friends, is where we find out improvement.
So what do I think this means?
I think it means making sure every training session is a close to perfect as possible (note I do not mean as fast as possible, or as long as possible. I mean as perfect as possible).
It means getting a massage.
It means stretching for a minute more or one more muscle than before.
It means going to bed 30 minutes earlier and making sure there are no distractions in the bedroom (well, apart from that obviously).
It means laying out your breakfast stuff the morning before an early run or a race.
It means thinking about everything that one can do that might have an impact in your A-race.
And where does that leave me? Well, I’m quite a long way up the bungee tunnel and the rope is quite tight. But I am not quite ready to slip back, not yet. I know that to get a little further up the tunnel I will have to work harder. But I am also going to work smarter. And I am going to accept that my days of 15 minute PBs are over and that from now on – if I am improving, I am improving and that is all I want.