We need sophisticated technology to deal with chucking

Darren Berry in Cricinfo

The Muralitharan case is more complicated than your garden-variety dubious action, given his flexible joints, rubber-like wrists, and the "carry angle" of the forearm © AFP

Let's get one thing clear from the outset - almost every offspinner in world cricket has a bend in his bowling arm. It is unnatural to bowl offspin without some degree of (flexion) bend. It is the degree of bend that is the contentious issue.

In fact, it's not the bend but the straightening (extension) of the arm as it rotates to bowl that causes the headaches. It is a complicated topic, but given the increased scrutiny and subsequent angst it is causing around the world it's time for some explanation.

It should also be recognised that it's not just offspinners who have this problem. Daryl Foster, a biomechanics expert with the University of Western Australia, and a former state coach, was recently quoted as saying he has greater concern with the fast men who bend it more than the highly scrutinised offspinners do. Some would be surprised to know that even the most pure actions of Dennis Lillee and Richard Hadlee had a degree of straightening as they flung down the ball in the '70s and '80s.

The legal limit of straightening of the arm is 15 degrees. In biomechanical terms, this means the angle (flexion) at the elbow joint when the bowling arm is horizontal prior to delivery is measured, and the degree of extension that has taken place at the point of release is also measured. If the change in angle is greater than 15 degrees then a bowler's action is considered under current ICC rulings to be illegal. Sounds complex? Well, it gets worse.

The most famous name embroiled in this "chucking" controversy was and still is the Sri Lankan great Muttiah Muralitharan, who was called 19 years ago in a Test at the MCG. It strained relationships and threatened to bring a halt to the series at the time. It also elevated to the surface a talking point that still rages today as to the legality of many bowling actions around the world.

	In my experience, none of the bowlers I have worked with who have come under scrutiny deliberately try to throw the ball to gain an advantage. It is usually a biomechanical defect and/or a technical issue

The Muralitharan case is even more complicated given his flexible joints, rubber-like wrists and another complex biomechanical term: "carry angle" of the forearm. This is the degree of angulation a person has in the forearm when standing in the anatomical position (upright with arms by the side, palms facing outwards). In most cases the greater the carry angle the greater the perception to the naked eye is of the appearance of throwing as opposed to bowling. It would take a biomechanist to explain this comprehensively, but I have learnt a lot in this area through necessity in recent times.

My coaching experiences in this area over the last decade have involved a couple of fast bowlers from the subcontinent, who came under severe scrutiny during my time at the IPL (with Rajasthan Royals) and more recently my involvement with the current South Australia captain and offspinner Johan Botha. In my experience, none of the bowlers I have worked with who have come under scrutiny deliberately try to throw the ball to gain an advantage. It is usually a biomechanical defect (very hard to rectify) and/or a technical issue that requires constant drilling and alignment to remedy. For the record, Botha has been reported on three occasions and on each of them found not guilty in testing and cleared.

Pakistan's Saeed Ajmal is the most recent high-profile offspinner to be called for a dubious action. This week, he was laboratory-tested in Brisbane to clear his action, or face a lengthy ban. We will know the outcome in a few weeks. Laboratory testing is the most contentious issue, as trying to reproduce exactly what happens in a competitive game environment is very difficult. Until we have sophisticated 3D technology that can be used in games, a true reflection of exactly what is taking place will never be attained. Scientists testing in a sports lab will never be able to replicate or reproduce exactly what players do in a highly competitive game environment, hence the great debate continues.

	It is vital the front arm acts like a rudder to steer the mechanics of the action © AFP  Enlarge

What exactly does an offspinner tend to do to give the perception that he is chucking, and more importantly how can it be rectified?

1. The jump or take-off position and finishing position in delivery stride is crucial. Any offspinner bowling right-arm over the wicket who jumps from wide of the crease and lands close to the stumps at the point of delivery has started the kinetic chain incorrectly. The results of this in the lower half of the body will greatly effect what happens in the upper half during delivery. To make matters worse, if the feet are in an open position when the front foot lands, this also tends to increase the lag of the bowling arm and ultimately exaggerates firstly flexion, then the dangerous forearm extension at the point of delivery.

2. The result of point no. 1 will cause issues with upper-body lean or hyperextension of the spine in delivery motion, and this impedes the arm's natural pathway in the bowling action. The result is a compromised action, where the body lays back significantly to allow natural arm path and consequently a bent arm inevitably results. The lower half of the body has jumped in too far and does not allow a smooth, clean action to be completed.

3. The non-bowling arm is a crucial aspect in a dubious offspin action. It is vital that it acts as a rudder to steer the mechanics of the action. It must remain strong and assist to align the body correctly in a side-on manner. The bowler must look outside the arm in delivery mode, otherwise the action will be too front-on, which generally results in bowling-arm lag time and often increased flexion and then extension in the elbow joint as the bowling action is completed.

4. Load-up position of bowling arm and hand. This has proved to be another vital component in a dubious action. Any offspinner who allows his bowling hand to rise above the mid-line of the body in wind-up generally then turns his wrist and forearm open too early before the hand passes the hip at the start of the delivery arc, and a bend in the arm occurs before the bowling arm reaches the horizontal. The action always looks ugly in these instances.

5. Finally, spearing the ball or firing it in at a pace greater than the normal arm speed of an offspinner causes all sorts of problems. The bowler endeavours to keep the batsman pinned to the crease and thus increases the velocity on the ball. The natural windmill arc of the action is lost and a javelin-type of action results. The introduction of T20 cricket has increased this tendency and created bad habits among many offspinners worldwide.

Smoothing out chinks in a bowling action is not an easy task and only constant remedial work with slow-motion video and ultimately 3D technology will assist. The naked eye can be a powerful tool but my experiences in ICC-approved testing labs around the world (Canberra, Perth and Cape Town) tells me that until we have 3D slow-motion replays available in games, the debate over illegal bowling actions will sadly continue to smoulder.

Doosra: Is it really a question of integrity?

Posted by Michael Jeh 1 day, 5 hours ago in Michael Jeh



John Inverarity has bowled me a doosra today with his comments about the doosra and integrity. I’m genuinely not sure which way to play this one.



That he is a gentleman and a scholar there can be no doubt. His reputation as man of decency and integrity allows him the privilege of making a comment such as this with some immunity from anyone looking to take cheap shots at him. From that perspective, reading his words carefully, I can draw no hint of mischief or hypocrisy in his brave statement. Perhaps a long bow could be drawn to infer that he is pointing fingers at some bowlers but I genuinely think that to do so would be to do the gentleman an injustice. Clearly he believes that the doosra has the potential to corrupt bowling actions and he would prefer to see the Australian bowling contingent shy away from that technique. Fair enough too if that is his genuine belief.



On the other hand, I also believe that it may be a bit naïve on the part of Australian cricket, if Inverarity is speaking on behalf of the institution rather than as an individual, to encourage a policy that is clearly going to disadvantage Australia to this extent. Put simply, the doosra is arguably the most potent bowling weapon in modern cricket. Especially in limited overs cricket, it is probably the single most influential factor in giving bowling teams a sniff of hope. The fast bowlers have proved woefully inadequate in coming up with anything new to stem the flow of boundaries. In fact, their skill level has actually dropped some considerable level, evidenced by the steady diet of full tosses that are served up at least once an over when under pressure. So the doosra and the variations that followed (carrom ball) can lay claim to being the most influential game-changer. When a bowler with a good doosra comes on to bowl, I immediately sit up and take notice because there is always the chance that a game can be turned on its head. Since Shane Warne led the new spin revolution, nothing has excited me more in the bowling stakes than the perfection of the various types of doosra.







That is why I am slightly flummoxed by Inverarity’s stance on it. Whilst not necessarily agreeing with his inference that it may lead to illegal actions, I respect his integrity enough to accept his point in the spirit it was intended. However, to encourage Australian spinners to not learn the art form is possibly putting principle before pragmatism. That in itself is admirable if it were applied universally but no country, least of all Australia, has ever applied this morality on a ‘whole of cricket’ basis so what makes the doosra so special? Is Inverarity suggesting that Australian cricket should now make decisions on the basis of integrity or is the doosra singled out as the one issue where we apply the Integrity Test? If so, is it any coincidence that we don’t really have anyone who can bowl the doosra with any great proficiency and will that change on the day we discover our own Doosra Doctor?



All countries have their own inconsistencies to be ashamed of so I’m not suggesting that Australia is alone in this regard. Far from it. Living in Australia, I just get to see a lot more of the local cricketing news so I’m better qualified to make comment on Australian examples. A few examples spring to mind….let’s think back to the times when we prepared turning tracks in the 1980s to beat the West Indies. A fair enough tactic too so long as there’s no complaints if other teams prepare pitches to suit their strengths. Similarly, I recall a period during the late 1990s when Australian teams insisted on having their fielder’s word accepted when a low catch had been taken. That theory worked OK until Andy Bichel claimed a caught and bowled off Michael Vaughan in the 2002/03 Ashes series when replays showed it had clearly bounced in front of him. I know Bich quite well and he is as honest as they come so it was genuinely a case of him thinking it had carried when in fact it hadn’t. Around that same period, Justin Langer refused to walk when caught by Brian Lara at slip, despite the Australian mantra that a fielder’s word was his bond. They come no more honourable than Lara in this regard so what happened to the principle? Like all matters of convenience, it is admirable but rarely works when it becomes an inconvenient truth.



And that is the source of my confusion with linking the doosra to the question of integrity. I’m not convinced that the integrity issue will stand the test of time if Australia accidentally discovers a home-grown exponent of this delivery. Likewise the issue of the switch-hit. Now that Dave Warner plays it as well as anyone, are we opposed to this too on integrity grounds? If Warner hadn’t mastered the shot, would that too be something that we would not encourage because it perhaps bent the spirit of cricket?



Only time will tell whether Inverarity’s wisdom and guidance will be mirrored by those in the organisation with perhaps less integrity and more pragmatism in their veins. I suspect it will take more than one decent man to stop an irresistible force. His motives may be pure indeed but I suspect that this is one issue that will turn the other way!