Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Chiropractic, Durban University of Technology, Durban, 2008. / Objectives: To compare trunk flexion and lateral flexion range of motion (ROM) pre-post intervention. To compare the bowling speed of Action Cricket fast bowlers pre-post intervention. To determine the correlation between change in bowling speed immediately post-intervention to change in trunk flexion and lateral flexion ROM immediately post-intervention. To determine the association between change in bowling speed immediately postintervention and the subjects' perception of change in bowling speed. Methods: Forty asymptomatic Action Cricket fast bowlers were divided into four groups of ten each. Group 1 received lumbar spine manipulation, Group 2 received thoracic spine manipulation, Group 3 received combined thoracic and lumbar spine manipulation and Group 4 received the sham laser intervention (placebo). Pre- and post-intervention trunk flexion and lateral flexion ROM and bowling speed were measured using a digital inclinometer and a SpeedTrac\x99 Speed Sport Radar. The subjects' perception of a change in bowling speed post-intervention was also recorded. SPSS version 15.0 was used to analyse the data. Twotailed tests were used in all cases. Results: Trunk flexion and lateral flexion increased significantly (p < 0.05) post-spinal manipulation. There was a significant increase in bowling speed post-thoracic (p = 0.042) and postcombined manipulation (p < 0.000). A significant yet weak positive correlation (p = 0.003; r = 0.451) was seen in change in bowling speed and change in thoracic flexion and lateral flexion. There was no significant difference in the percentage subjective change by intervention group (p = 0.217). Conclusions: Spinal manipulation is a valid intervention for short-term increase in bowling speed. / M

Thesis (MSpor)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.

During the last few years, much effort has been devoted to measuring the ability of sport teams, as well as that of the individual players. Much research has been on the game of cricket, and the comparison, or ranking, of players according to their abilities. This study continues preceding research using an optimization approach, namely, a binary integer programme, to select an SA domestic Pro20 cricket team.

Self-efficacy is considered to be a significant variable for enhancing all aspects of human performance (Druckman, 2004). Social support may influence self-efficacy through each of the four channels of self-efficacy information which consist of performance accomplishments, vicarious experience, verbal persuasion and physiological responses (Bandura, 1997). The primary aim of this study was to explore and describe the nature of change that occurred in selfefficacy and received social support of university-age academy cricketers over the duration of an academy programme. The secondary aim was to explore and describe the relationship between the two constructs, self-efficacy and social support. Sixty-five male, university-age (18-25 years) provincial academy cricketers completed a social support measure and a self-efficacy measure specifically designed for the purposes of this study. These measures were based on Rees and Freeman’s (2007) items and Cox, Martens and Russell’s (2003) revised Competitive State Anxiety Inventory-2 (CSAI-2 - Martens, Burton, Vealey, Bump & Smith, 1990) respectively. The perceived pre- and post-academy personal ratings of self-efficacy and social support, obtained prior to the start of the South African Interprovincial Academy Cricket week, referred to participants’ perceptions before and after attending their respective provincial academies. An inferential pre-experimental post-pretest design was used. The results included significant changes found in self-efficacy, esteem social support, informational social support and tangible social support over the academy season. There were no differences attributed to the length of time a cricketer had spent at the academy or to the cricketer’s highest level of achievement in cricket. The only significant correlation that existed between self-efficacy and social support was the correlation between self-efficacy and x informational social support. This study provided an initial insight into the role of self-efficacy and social support in talented cricketers, especially in a South African context.

Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Chiropractic, Durban University of Technology, 2009. / Objective: Literature has focused its efforts on professional cricket players and player related risk factors to injury with little information being available with regards to coaching / management and environmental risk factors to injury. Therefore, this study aimed to profile the injuries and risk factors in Premier League club cricketers in the greater Durban area. Methods: This was a prospective, cross-sectional based study, using a self-administered questionnaire, developed specifically for this research utilizing a focus group and pilot study. The questionnaire consisted of a demographics section, as well as an injury history and risk factor section. Letters of informed consent and questionnaire were distributed to 144 players / coaches for completion. Data was analysed using Pearson‟s correlation and t-tests. Results: A response rate of 70% (n=109) was achieved. Selected parameters from demographics, injury history and risk factors were found to be significantly related to current and / or previous injury. Conclusion: It is advised that coaches heed significant injury parameters in order to improve player health, decrease injury risk and decrease time out of play. Key words: Athletic injuries; questionnaires; cross-sectional study‟s; risk factors; sports; sports medicine; risk assessment; cricket.

Thesis (PhD (SportPsych))--University of Stellenbosch, 2009. / There has been a greater awareness in the psychological aspects of sport over the past few decades, and in particular, how the psyches of the players affect their performance. The game of cricket has been no exception. Neuro-Linguistic Programming (NLP) has been used successfully in the business world, but very little research has been done in the sport milieu. The motivation for this research was two-fold. First, there was the need for a cricket team to be mentally prepared to play at their highest potential on provincial level; second, the researcher was curious about NLP techniques being successfully applied in sport. NLP is the study of human excellence. It describes human functioning, and focuses on experience and experimenting rather than prescription; it can focus on how to intervene, transform and improve human functioning. NLP uses modelling to identify particular skills in successful people. (They like to say: “If he can do it, then I can do it too”.) Neuro refers to the nervous system and how it processes particular codes in the body through the five senses. Linguistic refers to the use of language and how it gives meaning to the neural processes through communication and symbolic systems. Programming refers to how a person sequences his actions to achieve his goals.

Lower back injury remains the most important injury problem in professional cricket with lumbar stress fractures in fast bowlers accounting for the most lost playing time. Previous research has associated workload, paraspinal muscle asymmetry and technique factors with lower back injury in fast bowlers, however, preventative strategies such as workload directives and coaching guidelines have not reduced the incidence and prevalence of these injuries. Recent developments in medical imaging technology have improved diagnosis of pathologies such as lumbar posterior bony element (partes interarticulares and pedicles) stress fractures and intervertebral disc degeneration in athletes whilst also allowing quantification of other, potentially associated factors such as paraspinal muscle asymmetry. However, there is very little published research regarding the use of modalities such as magnetic resonance imaging (MRI) in the identification and prognosis of these types of injuries in fast bowlers. Similarly, advances in three-dimensional (3D) motion analysis has aided technique evaluation in a variety of sports, however, little remains known about the pathomechanics of lower back injury in fast bowling. Therefore, the aim of this doctoral research was to investigate relationships between lower back injury and; the MRI appearance of the lumbar posterior bony elements and intervertebral discs, MRI-derived lumbar muscle morphology and the three-dimensional (3D) trunk kinematics of professional fast bowlers in cricket. This was examined in a series of five studies. The first study undertaken was an investigation of the MRI appearance of the lumbar spines of 36 asymptomatic professional fast bowlers and 17 active controls. / It was identified that the fast bowlers had a high prevalence of multi-level, predominantly non-dominant side, acute and chronic stress changes in the posterior bony elements of the lumbar spine. Multiple level disc degeneration was also more advanced in the fast bowlers compared with the control - iv - participants. However, disc degeneration appeared not to be associated with lumbar stress injury. The second study investigated the reliability and accuracy of using MRI to determine the FCSA of the lumbar paraspinal muscles (psoas, quadratus lumborum, erector spinae and multifidus). The novel methodology developed in this study was determined to be both valid and highly reliable. In the third study, this technique was then used to describe the functional crosssectional area (FCSA) morphology of the paraspinal muscles in a group of 46 professional fast bowlers and the 17 control participants scanned in the first study. It reinforced that there was a higher prevalence of lumbar muscle asymmetry in the fast bowler group. Paraspinal muscle asymmetry, consistent with hypertrophy of the dominant side muscle, was most prevalent in the quadratus lumborum of fast bowlers, and was also evident in the lumbar multifidus in both groups of subjects. The aims of the fourth study of the thesis were to quantify the proportion of lower trunk motion utilised during the delivery stride of fast bowling and to investigate the relationship between the most accepted fast bowling action classification system and potentially injurious kinematics of the lower trunk. 3D kinematic data were collected from 50 male professional fast bowlers during fast bowling trials and these were normalised to each bowler’s standing lower trunk range of motion. A high percentage of the fast bowlers used a mixed bowling action attributable to having shoulder counter-rotation greater than 30°. / The greatest proportion of lower trunk extension (26%), contralateral side-flexion (129%) and ipsilateral rotation (79%) was utilised during the front foot contact phase of the fast bowling delivery stride. There was no significant difference between mixed and non-mixed bowlers in the range of motion used during fast bowling. It was concluded that fast bowling action characteristics currently used to identify potentially dangerous action types may not be directly related to the likely pathomechanics of contralateral side lumbar stress injuries. It is proposed that coupled lower trunk extension, ipsilateral rotation in addition to extreme contralateral side-flexion, during the early part of the front foot contact phase of the bowling action may be an important mechanical factor in the aetiology of this type of injury. In the final study, a combination of the factors described in earlier studies i.e. the lumbar MRI appearance of the partes interarticulares and intervertebral discs, paraspinal muscle asymmetry and selected bowling action and delivery stride trunk kinematic variables, were examined. Therefore, the aim of this study was to examine the relationship between fast bowler lower back injury occurrence (one season either side of testing) and the aforementioned factors that were measured when participants were asymptomatic and bowling competitively. The results of this study indicated that a high percentage of professional fast bowlers in the United Kingdom continue to sustain a high number of acute lumbar stress injuries and these result a significant amount of lost playing and training time. Fast bowling action classification and lower trunk kinematic variables were not conclusively linked to acute lumbar stress injury occurrence. However, further investigation of the effect of coupled lower trunk motion on nondominant side lumbar bone stress is indicated. / The presence of acute MRI stress changes (particularly acute stress changes such as bone marrow oedema, periostitis and acute fracture lines) in the non-dominant side lumbar posterior elements seem to have a relationship with acute stress injury occurrence. Regular lumbar MRI scanning may assist in identifying early acute stress changes prior to the onset of symptoms. Intervertebral disc degeneration was less prevalent amongst professional fast bowlers who suffered acute stress injuries than those who had no significant lower back injury. Finally, although fast bowlers have a high prevalence of quadratus lumborum and lumbar multifidus asymmetry (larger on the dominant side), there was no observed relationship between acute lumbar stress injury and these findings.

Dissertation submitted in partial compliance with the requirements for the Master's Degree in Technology: Chiropractic, Durban University of Technology, 2009. / Objective: Literature has focused its efforts on professional cricket players and player related risk factors to injury with little information being available with regards to coaching / management and environmental risk factors to injury. Therefore, this study aimed to profile the injuries and risk factors in Premier League club cricketers in the greater Durban area. Methods: This was a prospective, cross-sectional based study, using a self-administered questionnaire, developed specifically for this research utilizing a focus group and pilot study. The questionnaire consisted of a demographics section, as well as an injury history and risk factor section. Letters of informed consent and questionnaire were distributed to 144 players / coaches for completion. Data was analysed using Pearson‟s correlation and t-tests. Results: A response rate of 70% (n=109) was achieved. Selected parameters from demographics, injury history and risk factors were found to be significantly related to current and / or previous injury. Conclusion: It is advised that coaches heed significant injury parameters in order to improve player health, decrease injury risk and decrease time out of play. Key words: Athletic injuries; questionnaires; cross-sectional study‟s; risk factors; sports; sports medicine; risk assessment; cricket.

Introduction: With batting in cricket, there is no known end point, making the allocation of resources and the development of a suitable pacing strategy more difficult. How batsmen allocate resources and pace themselves when repeatedly sprinting between the wickets is therefore not known. According to the ‘anticipatory feedback’ model, the level of expertise/experience has a substantial influence on the development of a suitable pacing strategy. Skilled or experienced batsmen may therefore have a greater ability to develop and implement a pacing strategy compared to that of novice or less-skilled batsmen. Purpose: To assess whether the absence of a known end point at the beginning of repeated sprint bouts between the wickets effects how batsmen pace themselves comparing skilled and less-skilled batsmen. Methods: Twenty-four male cricketers from a university league were selected. Twelve skilled batsmen (players in the top five batting order), and 12 less-skilled batsmen (players in the bottom five batting order) completed three experimental. All trials required batsmen to complete the same number of shuttle sprints (14 shuttles and therefore 28 runs), while only the information provided before each trial differed. Control Trial: This trial is also referred to as the ‘informed’ trial as the batsmen are aware of the exercise requirements (end point). Unknown Trial: The batsmen were not informed of the exercise end point and were required to run on command for an indefinite period (28 runs). Deceptive Trial: Batsmen’ were incorrectly informed with regards to the number of sprints (told they were only doing 14 runs when in fact they were doing 28 runs). Muscle activity, sprint times and RPE measures were obtained during all three trials and compared. Results: Significant (p<0.05) group effects were apparent for sprint times and, ‘central’ and ‘local’ RPE. Specifically, skilled batsmen obtained the faster mean sprint times, and less-skilled batsmen reported the higher mean ‘central’ and ‘local’ RPE values in all three experimental trials. There were no significant group effects for muscle activation. Skilled batsmen did however have lower muscle activation compared to less-skilled batsmen in all three trials. Furthermore, general trends revealed that sprint times and muscle activation decreased over time (from shuttle 1 to shuttle 14), and RPE (‘central’ and ‘local’) ratings increased, regardless of the experimental trials. Skilled batsmen performed the best in all three trials. This was determined by the attainment of faster sprint times, lower muscle activation and low RPE ratings in each of the three trials. The assessment of the relationship of the dependent variables measured in each trial, did however suggest that skilled batsmen performed best in the deceptive trial while less-skilled batsmen performed best in the control trial. Skilled batsmen thus showed superior performance when trial requirements were unclear. Less-skilled batsmen however, were seen to experience decrements in performance when information regarding the end point was unknown or misleading. Conclusion: It can thus be concluded that previous experience facilitates in the obtainment of improved sprint times between the wickets, especially when the exact end point is unknown.

The main purpose of this study was to determine: * If there is a relationship between certain personality traits and participation in sport. * Whether cricket players possess certain personality traits in general and with regard to levels of play, playing positions and age. The literature study indicated that the study of personality tend to be complex and showed a relationship between personality traits and participation in sport. Furthermore the literature study showed that personality is not static, but dependant on acquired traits and responses. The empirical study revealed that certain personality traits in cricket players figure stronger than others regarding levels of play, playing positions and age, for example cricket players on club level tend to have more self control than school players and bowlers tend to show a larger tendency to disregard social rules and tend to be more enthusiastic, and greater risk-takers than batsmen and wicketkeepers. / Educational Studies / M.Ed. (Guidance and Counselling)