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Fast bowling has unique biomechanical demands. the lumbar spine is typically the focus for clinicians working with these athletes, but the ankle also sustains repetitive high loads. Bikram Karmakar uncovers the demands on the ankle and clinical implications for practitioners.
England v Bangladesh - Assam Cricket Association Stadium, Guwahati, India - England’s Lauren Bell in action bowling REUTERS/Mihir Singh
Fast bowling is the most physically demanding action in cricket. Fast bowlers typically bowl from the first over of a match and are expected to set the tone for their team. The best bowlers bowl fast and accurately, sustaining this over long periods. Fastbowling places significant demands on the entire body. Clinicians have focused their attention on stress-related lumbar spine injuries in fast bowlers. However, the biomechanical demands on the fast bowler’s ankle are also significant. The front foot has a substantial role in dissipating and redirecting force from the point of landing in the delivery stride. The repetitive forces produce characteristic findings in the fast bowler’s ankle.
| Phase | Mechanics |
| Run-up | Standard running gait cycle with load distributed evenly across both sides. Individual variations occur in stride length and run-up speed. |
| Pre-delivery stride | The bowler jumps off the front foot and is aerial. The trunk configuration and the point at which the back foot lands determine the action type. |
| Delivery stride | The bowler typically lands on the forefoot aspect of the back foot. Weight is immediately transferred to allow FFC, which occurs in a plantarflexed position, followed by rapid dorsiflexion. With the entire front foot in contact with the ground, the front leg is in a braced position as the ball is released. |
| Follow-through | The back foot follows through first, and energy is dissipated over several steps. |
There are four main phases of fast bowling: the run-up, pre-delivery stride, delivery stride, and follow-through (see table 1)(1). The front foot typically denotes the leg opposite to the bowling arm, and the back foot the same side as the bowling arm. The delivery stride is a critical phase and involves both front foot contact (FFC) and back foot contact (BFC) (see figure 1).
“Fast bowling is the most physically demanding action in cricket.”
Ground Reaction Force
Ground reaction forces (GRFs) can be up to three times body weight at BFC and can peak at eight to nine times body weight at FFC(2). The bowler absorbs the forces primarily through the ankle and redistributes the forces proximally to assist in generating faster bowling speeds. The back foot contact in the follow-through is also significant and produces the highest tibial accelerations of the bowling action(3).
Stride Length
Stride length during the run-up plays a pivotal role in ankle load. Longer delivery strides displace the center of mass further behind the lead ankle. This increases plantarflexion angles and causes negative joint work. A greater plantarflexion angle increases susceptibility to posterior impingement(4). Long strides may increase ball release speeds but may lead to a trade-off between performance and injury.
Action Type
Bowling actions are commonly described as side-on, front-on, semi-open, or mixed. Mixed and front-on actions lead to higher vertical GRF loading rates at front-foot contact compared with semi-open actions(5). Higher loading rates, combined with rapid plantarflexion, predispose bowlers to both acute ligament injuries and posterior impingement.
Footwear and Shear Forces
Footwear can significantly modify ankle loading mechanics. Cricket-specific shoe designs reduce front-foot lateral shear force and knee external-rotation moments(6). Bowlers often modify their footwear for comfort, but should be cautious not to increase ankle shear stresses and impingement risk inadvertently.
Range of Motion
Rapid dorsiflexion that occurs at FFC leads to high plantar flexion eccentric loads. Restricted ankle dorsiflexion can lead to altered trunk and hip mechanics during delivery. Compensatory load distribution leads to greater joint reaction forces through the ankle(7). Conversely, excessive plantarflexion increases the risk of posterior impingement. Screening tests such as the knee-to-wall assessment of dorsiflexion range can provide valuable insight into potential injury risk.
Posterior Ankle Impingement Syndrome (PAIS)
Posterior ankle impingement syndrome is the hallmark injury of the fast bowler’s front foot landing ankle and arises from repetitive forced ankle plantarflexion. Contributing factors include:
Bowlers present with posterior ankle pain that is most evident during push-off movements and forced plantarflexion. Imaging may reveal anatomical factors or soft tissue thickening in the posterior aspect of the ankle.
Lateral Ankle Ligament Sprains
These are the most frequent ankle injuries in cricket. While they often occur in fielding, fast bowlers have specific risk factors. The back foot may be subject to inversion stress during the follow-through. This is most notable in bowlers with a mixed type of action. Similarly, inversion stress can occur if the back foot strike inadvertently occurs on the outer aspect of the foot during the delivery stride (see figure 2). Recurrent inversion injuries may cause chronic instability and impair the capacity to distribute load efficiently.
Achilles Tendinopathy
The front foot is most susceptible to Achilles tendinopathy. During the transition from front foot contact to ball release, the ankle transitions rapidly from plantarflexion into dorsiflexion. During this period, the Achilles tendon is subjected to eccentric loading. The forward propulsion of the body after ball release results in the front ankle returning to plantarflexion and the Achilles contracting concentrically. Load management may be instituted to reduce fatigue or rapid load spikes, which may otherwise predispose to tendinopathy. Limited ankle dorsiflexion and weak calf musculature theoretically contribute to increased tendon strain at the front foot contact.
Stress Fractures
Stress fractures in the ankle are uncommon but can be significant. High cumulative GRFs may predispose bowlers to navicular and distal tibial stress fractures. These injuries often present with insidious pain and require prolonged rest. Risk factors include congested match scheduling, suboptimal footwear, and unaddressed workload spikes.
Clinical assessment should specifically target the key injuries of fast bowlers (see table 2).
| Clinical Domain | Clinical Test | Determinant |
| Range of motion |
|
|
| Structural integrity |
|
|
| Functional strength |
|
|
Workload Monitoring
Clinicians can use acute:chronic workload ratios to track bowling load. Injury risk is present with both excessive load and underload, particularly when followed by spikes in bowling intensity or volume(9).
Strength and Conditioning
Clinicians must consider key areas when working with fast bowlers. These include:
• Eccentric calf strength for tendon resilience,
• Hip and trunk stability for effective load distribution,
• Dynamic balance for neuromuscular control,
• Plyometrics for improved responsiveness and efficiency.
Footwear
Purpose-built cricket shoes reinforce toe caps, provide cushioning, and incorporate spikes for improved traction. Injured athletes may require modifications, such as with orthotics. The front foot can often slide forward within the shoe on FFC, so fast bowlers may choose to remove the medial
section of the toe box to reduce friction.
Bowling Action Biomechanics
Clinicians must assess several technical factors in the bowling action of the fast bowler experiencing ankle-related issues:
“The fast bowler’s ankle is subject to unique demands.”
Mandatory Credit_Action Images_Ian Smith Livepic
The fast bowler’s ankle is subject to unique demands. In most sports, the ankle plays a crucial role in providing stability during multi-directional movements. Fast bowling places added demands on the ankle as a load-absorbing joint. To effectively assess and manage the rehabilitation of the fast bowler’s ankle, there must be a distinct understanding of the unique loads that it is subject to. Posterior ankle impingement syndrome is the signature pathology of the fast bowler’s ankle. Biomechanical assessment of the run-up gait should place specific attention on the landing of the front foot. Adjustments to the action or stride length during the run-up may be necessary. The clinical team should screen ankle range of motion, monitor workload, ensure adequate conditioning, and ensure appropriate footwear.
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