Giants of the midfield – the rise of the 100kg inside centre in rugby

Over the past few decades the bodyweight of international rugby players has been consistently increasing. In the main such increases have occurred gradually, a reflection of improvements in resistance training and nutrition which have enabled hypertrophy gains without sacrificing speed and mobility.

A comparatively recent development, however, seems to be a deliberate preference for the use of very heavy players in the backline, most notably in the inside centre position. This would appear to reflect a fundamental rethinking of the role of the 12. Consider the following table showing the body weights of midfielders used by major countries in the European Autumn internationals:

Body Weights of Tri Nations and 6 Nations Midfielders - Nov 2010

	Five-eighths		Inside Centres		Outside Centres
Australia	Cooper	84	Barnes	88	Ashley-Cooper	98
England	Flood	91	Hape	102	Banahan	115
France	Traille	100	Jauzion	105	Rougerie	104
Ireland	Sexton	92	D'Arcy	93	O'Driscoll	95
Italy	Orquera	78	Sgarbi	101	Canale	94
New Zealand	Carter	92	Nonu	102	Smith	95
Scotland	Parks	91	Morrison	103	Ansbro	92
South Africa	Steyn	88	de Villiers	100	Steyn	100
Wales	Biggar	90	Bishop	93	Hook	92
Data from espnscrum.com site

The table lists players in the 10, 12 and 13 positions for the nine Tri Nations and 6 Nations teams in matches played on the 19th and 20th of November. It can be seen that six of the nine inside centres weighed 100kg or more. Only three outside centres and one five-eighth met that weight standard.

Of the sub-100kg 12s, D’Arcy of Ireland and Bishop of Wales each weighed 93kg while the Australian Barnes weighed only 88kg. Significantly the Wallabies have also played the 85kg Giteau at 12 on this tour while the All Blacks have made use of the 108kg Williams.

Traditionally the 12 was the more thick set of the two centres although by no means a huge player. He could play a crash ball type game but also had the speed and agility to be able to exploit gaps. He was expected to be a very solid defender who could cover if necessary for the less robust 10.

Reflecting its labelling of the 10 and 12 positions as first five-eighth and second five-eighth, New Zealand pioneered the practice of replacing a conventional inside centre with a player whose skill set and experience were those of a 10. More recently there has been a general tendency and expectation for five-eighths to attack the line rather than playing an essentially “white shorts” game. Having two light-framed players side by side each attempting to explore gaps encourages a very aggressive defensive reaction.

Possibly because of this many countries, including New Zealand, have gone back to a more conventional inside centre but with the important difference that these players are now very large and physically imposing. The notable exception to this trend is Australia.

The Deans experiment

Robbie Deans has now been coaching the Wallabies for just under three years. I have previously written about the physical conditioning regime which Deans and his strength and conditioning coach Peter Harding have implemented (“The Wallabies – sprinters not stayers”). But it is the type of backline structure and play that he has been developing that will distinguish his tenure as national coach.

As can be seen from the table below, when Deans took the Wallabies to Europe in 2008 their body weight and age profiles were little different to what they were two years previously. Two years later the average body weight and average age of the backs have declined dramatically:

Body Weight and Age Statistics - Wallabies 2006 to 2010

	2006 Squad	2008 vs. England (Nov)	2010 vs. England (Nov)
Average body weight (kg)	102.6	102.1	99.7
Average body weight - forwards	111.1	110.6	110.3
Average body weight - backs	91.8	92.4	87.6
Average age (yrs)	26.1	26.6	25.1
Average age - forwards		26.8	26.4
Average age - backs		26.4	23.6
2006 data from “Building bigger and stronger rugby players – the Sydney University experiment”; 2008 and 2010 data from espnscrum.com.site

The 2010 backs are on average 4.8kg lighter than those of 2008 and 2.8 years younger. The inside centre on the earlier tour was Stirling Mortlock who at 100kg was 15kg heavier than his successor Matt Giteau. During his tenure Deans has taken on tour quite a number of very young and small backs while ignoring or discarding heavier and more robust players. His desire to groom such players creates a potential imbalance which would seem to be reflected in the figures in the table.

Typically his backlines contain four players who would be classed as playmakers and inevitably the 12 position is filled by a back-up five-eighth. Having a small 12 and multiple playmakers in the one backline may prove to be an inspired strategy, although it hasn’t yet yielded obvious dividends. Clearly this approach is at odds with the current thinking of the other leading nations who all appear to have identified the inside centre position as requiring a very big player. Presumably next year’s World Cup will determine which approach prevails.
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Rugby's Age of the Low Skinfold Giants

In 1991 England's international rugby forwards and backs weighed, on average, 100 kg and 83 kg respectively. Their counterparts in 2003 weighed 109 kg and 90 kg. (England Rugby Injury and Training Audit 2002-04)

By comparison in this year's Test against the Wallabies the England squad's average weight had further risen to 113.4 kg for the forwards and 93.4 kg for the backs. Thus in just 18 years elite level forwards had increased their weight by some 13 kg and the backs by 10 kg. And a much greater proportion of the bulk of the modern player is lean body mass.

Present day players are not just bigger, but also stronger and fitter and, certainly with the forwards, much quicker than those of the pre-professional era. Thus there is massively greater force being generated in the game's collisions, even without taken account of the modern two-on-one techniques of tackling. Little wonder then that the coaches' preferred teams have been decimated by injury from both playing and training.

For this Test the Wallaby forwards were outweighed by about one kg per man and the backs by two kg. But there was a very significant weight discrepancy in the front row. England's engine room five averaged a massive 119 kg while their opponents were a relatively puny 114 kg.

One of the greatest differences between the squads was in the players' ages. Ten of the home team's squad of 22 were aged 29 or older. By contrast the Australians, who seem to be taking the view that anyone over 30 is ready for the Golden Oldies, had just three.

There is a ten-year age gap between the ages of the reserve outside backs. Ayoola Enrile is 29 while James O'Connor is just 19. But this is inconsequential compared to the massive difference in their body weights. Enrile weighs 110 kg, a full 30 kg heavier than O'Connor!

Small wonder then that The Australian in late October attributed to Robbie Deans the view that "there could come a time when the Matt Giteaus, James O'Connors and Will Genias of the game simply find themselves too small to survive at the top level.”

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Benn Robinson popping Phil Vickery in the scrum

I know it's impolite to gloat and tempting the fates for an Australian to boast about Wallaby scrummaging but the Green and Gold Rugby blog site has the most extraordinary footage of the Wallabies tearing apart the English pack and in particular Benn Robinson turning Phil Vickery inside out. The sequence cycles endlessly in the post, Robinson smashes Vickery showing very clearly the delivery of force from the players behind the dominant prop.

It is the most wonderful feeling when you are the 'popper' and both humiliating and often frightening when you are the 'poppee'. I don't know whether that's a word but it is now.
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