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.

Cricket - There's more grey to chucking than we might think

Osman Samiuddin in Cricinfo

A decade ago cricket's ancient and embedded hyper-morality crashed into the modern world's burgeoning thirst for reality television. The focus for this communion was Muttiah Muralitharan, and more specifically his action. Two TV networks, ESPN (in India) and the UK's Channel 4, broadcast what were paraded at the time as definitive acquittals of Muralitharan's action, which had till then been called periodically, sanctioned occasionally, and the subject of hysterical debate permanently.

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Muralitharan went through his repertoire of deliveries with a steel-embedded plaster brace around his right arm, from bicep to wrist, and with admirable good nature. He looked a little uneasy in the ESPN show, a little too much like the guinea pig just becoming aware of his centrality to bigger, buffeting winds. But he went about it like a man who felt he needed to.

He bowled to Michael Slater in that one, to recreate match conditions. There was a doctor present too, explaining the unique physical quirks of Muralitharan's wrist, arm and shoulder, though he felt a little like Dr Nick Riviera, whose only residency of note has been on The Simpsons. Ravi Shastri, for ESPN, was quadruply burdened, as host, judge, jury and, eventually, the benefactor who cleared Murali. Shastri did so in the manner with which we are all familiar, effectively hype-mastering a science documentary. For Channel 4, Mark Nicholas managed a sombre posture, considered and inquiring but above all providing a kind of bipartisan seal on matters.

The issue by then had become so divided along racial lines that a non-Asian clearing of Murali felt necessary. That was the ultimate takeaway, of course, that Murali did not chuck. He could not with that steel brace on. Even Slats, an Aussie, said so.

In hindsight it is not so much the details of Murali's case that were important as was the fact that cricket felt the need for this public trial by TV in the first place. Even today, viewing it produces the kind of cringe only a certain kind of reality show does; especially the eagerness with which Muralitharan is cleared, as if he was guilty of some crime.

Though he looks uncomfortable in the ESPN version, Murali looked cheery and eager for Channel 4. He was probably a willing participant, perhaps even an instigator in doing the shows, but that is hardly the point. He was compelled into it by cricket, feeling no other recourse was available to prove that he was not some evil, cheating villain who would leave cricket forever corrupted. That is precisely what umpires such as Ross Emerson and Darrell Hair seemed to think he was, no-balling him with such ugly fervour that it was impossible to avoid feeling a vicarious humiliation at what Murali underwent. Men are prone to delusions when invested with the tiniest bit of authority in any case, but when furnished with a haloed moral authority they become monsters, or cricket umpires.

Hair and Emerson were after all only maintaining professional tradition. In every purge of suspect actions, umpires have led the hounding, right at the front of bloodthirsty crowds. Chuckers (and even the word is so phonetically derisive) have never been just men with kinks in their actions, or have seemed to bowl thus as a natural outcome of the overarm bowling action, which basically predetermines some degree of straightening (as an ICC survey discovered back in 2004). Cricket has treated chuckers as lepers because cricket doesn't have a reliable sense of a scale of bad: it can summon about the same amount of moral outrage for slow over rates as it can for Mankading, intimidatory bowling and match-fixing. It has a spirit nobody can define but one everybody screeches about when it is - regularly and easily - breached. So Murali and Saeed Ajmal walk around with an asterisk floating above them. To their detractors they are asylum seekers who exist only because of the weak-kneed liberalism of a governing body.

Maybe now the urge to purge is suppressed a little but the moralising over suspect actions remains; in the smugness of Australia and England that their offspinners do not bowl doosras, or feel the need to wear long sleeves (Shane Warne, one failed drug test plus one corruption scandal to the good, sniggering at Ajmal's long sleeves in the World T20 is a classic example of cricket's wonky moral scale); in Michael Vaughan tweeting and Stuart Broad responding to a photo of Ajmal in action and, metaphorically, nodding and winking. That yanks into black-and-white territory what is an inherently grey matter.

Suspect actions can be deliberate but they can also be functions of the mechanics of human bodies we do not understand. Could anyone have imagined that a study would find 99% of bowlers in cricket straighten their arm to some degree? What effects do injuries have, as a fairly serious accident did on Ajmal's right forearm when he was younger? How to explain the squirmy spectacle of Shoaib Akhtar being able to bend his elbow in ways that normally ought not to have been possible?

Where, in any case, is the study that sheds light on the exact nature of the advantages gained from greater elbow straightening? It is said that bowling the doosra is impossible without breaking the acceptable degrees of flex, but how to explain Saqlain Mushtaq, the pioneer, who did it with almost no visible bend at all? He even bowled it under the eyes of Hair and Emerson and elicited not a squeak, so he must have been fine, right? Even if we make the crazy assumption that post-Murali, Hair might have been chastened?

	Where is the study that sheds light on the exact nature of the advantages gained from greater elbow straightening?

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Cricket cannot continue being blind to the grey of this issue because soon we might be in greyer territory. Last week the ICC's cricket committee expressed its concerns about the identifying, reporting and testing of suspect actions. The processes, they said, need to change.

The primary reason appears to be discontent with the testing labs at the University of Western Australia in Perth, where bowling actions have hitherto undergone testing. The time and cost of sending a bowler that far has always been problematic but now more issues have emerged. One official familiar with the meeting last week says that there was concern about discrepancies in the findings of the Perth labs and others around the world. Apparently the Perth lab has not been following the exact protocols for testing actions that the ICC has laid down, disagreeing with the nature of those protocols.

So the ICC wants to accredit other labs around the world, in England, South Africa and India initially, and ultimately standardise testing protocols and results. The utopian aim is to have testing centres in every Full Member country, so that bowlers can be observed, tested and corrected at domestic level before they get further.

More significantly, they are also testing body sensors that could capture real-time analysis of a bowler's action during a game. These were tested by under-19 players at the recent World Cup but only in net practice, and much more work needs to be done before it goes further. The calibration of the sensors on the arm is a particular issue, especially after players dive in the field.

In time, that will be the least of the problems, because trickier questions will arise. Who will wear sensors in a game? Those who have already undergone testing once? Others we suspect have a kink in their action? Nobody, as the ICC says, is cleared permanently, so everyone is under the scanner theoretically. Singling out someone who may have a kink but has not been tested officially places an undue burden on the bowler and recreates, in a way, the TV trial Murali underwent. How real is real-time? Will we be able to see the results after each ball, after each over, after each session, after each day?

Mike Hesson has already asked how those with suspect actions will be policed: what happens, he said, if a wicket falls off a ball delivered by an action in breach of the laws? Will a TV umpire review it immediately? Umpiring technology hardly needs further complication. As it stands, these discussions haven't begun but these are difficult and complicated questions. It is, after all, a difficult and complicated issue, even if it feels sometimes that cricket has still not grasped this.