Background: Clothing and protective gear worn during intermittent exercise has shown to increase physiological and perceptual responses, and negatively impact performance capacities, due to increased heat strain, suggested to hasten the onset of fatigue. However, the mechanisms of fatigue experienced in rugby remain unclear. Objectives: The aim of this study was establish whether clothing and protective gear worn during a simulated rugby protocol impacts players‘ biophysical, physiological, perceptual and performance responses. Methods: 15 registered university and school first XV rugby players with a mean (± SD) age of 20.9 years (± 1.9) volunteered to participate in the study. Testing was performed in a controlled laboratory setting, with temperatures having to be within the range of 16º C-22º C. The mean (± SD) ambient temperature was 17.6º C (± 1.6) for the control condition and 17.3º C (1.5) for the experimental condition. The mean (± SD) relative humidity was 65.2 % (± 9.5) for the control condition and 66.3 % (± 10.0) for the experimental condition. Player‘s performed two protocols of 80-minutes; a control condition (minimal clothing and protective gear) and an experimental condition (full clothing and protective gear). Physiological, perceptual and performance responses were measured at set intervals during the protocol, while biophysical responses were measured pre-, at half-time and post-protocol during a 3-minute EMG treadmill protocol. Results: Muscle activity significantly (p< 0.05) increased with increasing running speeds. There were no significant (p> 0.05) differences for muscle activity between conditions, except for the semitendinosus muscle, which was significantly (p< 0.05) higher during the control condition while running at high speeds. Players‘ heart rates, core temperatures and perceptual responses were significantly (p< 0.05) higher during the experimental condition, compared to the control condition. Performance responses were significantly (p< 0.05) lower during the experimental condition. Conclusion: The main driver of physiological and perceptual responses was the exercise itself. However, the additional clothing and protective gear exacerbated the responses, particularly towards the end stages of the protocol. This negatively impacted players‘ performance. Muscle activity appeared to be unaffected by increased body temperatures. However, core temperatures never reached critically high levels during either condition.

The aim of this study was to generate useful isokinetic normative data for various cervical musculature strength, range of motion and ratio variables based on different positional categories in a sample of senior elite South African rugby players. Normative data was generated for the following variables: peak torque, power generated at 0.2 of a second, active and passive range of motion, the ratio of peak torque flexion to peak torque extension (PTF/PTE), the ratio of peak torque lateral flexion left to peak torque lateral flexion right (PTL/PTR), the ratios of peak torque to body weight (PT/BW) and the ratios of peak torque to lean body mass (PT/LBM). Furthermore, the data gathered from the senior elite players was compared to similar data obtained from a sample of schoolboy rugby forwards to detect statistically significant differences (p < .05). A normative survey design was used in which 189 subjects from eight provincial unions participated in a one off evaluation session. The evaluation session comprised of various anthropometrical measurements and an isokinetic cervical musculature assessment. The normative data, displayed in Stanine tables, was generated for four positional categories: the front row (# 1-3), the second row (# 4-5), the back row (# 6-8) and the backline (# 9 -15). The second row positional category performed the best on the peak flexion torque variable (44.04 Nm). The front row positional category achieved the largest average peak extension torque (65.6 Nm). The second row positional category achieved the largest average peak lateral flexion right torque (69.42 Nm). A similar result was observed with the measurement of peak lateral flexion left torque, with the second row positional category achieving the largest average peak lateral flexion left torque (66.31 Nm). The backline positional category achieved the lowest averages on all the abovementioned peak torque variables. The front row positional category performed the best on the flexion power generated at 0.2 of a second variable (160.92 W). The front row positional category again achieved the largest extension power generated at 0.2 of a second average (237.02 W). The second row positional category achieved the largest lateral flexion right power generated at 0.2 of a second average (269.81 W). Similar results were observed with the measurement of lateral flexion left power generated at 0.2 of a second. The second row positional category achieved the largest lateral flexion left power generated at 0.2 of a second average (259.62 W). Again the backline players achieved the smallest power generated at 0.2 of a second averages for all the above-mentioned power variables. The measurement of passive (PROMFE) and active (AROMFE) range of motion for flexion to extension revealed that the second row had the largest average PROMFE (125.44°). The measurement of AROMFE revealed a similar result. The second row again had the largest average AROMFE (108.45°). The measurement of passive (PROMLF) and active (PROMFE) range of motion for lateral flexion left to right revealed smaller and different results to those found for PROMFE and AROMFE. For the variable of PROMLF the backline players had the largest average PROMLF (119.44°). Conversely, the second row had the largest average AROMLF (106.96°). The calculation of the various ratios revealed great variation between the positional categories. This can be attributed to the functional requirements the players have to adhere to, to be successful in their position. Various other statistical calculations were performed to draw the average force distance graphs for the positional categories for the peak torque variables. Furthermore the force distance graphs were assessed to determine the players’ ability to maintain 80% of peak torque. All the senior elite positional categories proved to be significantly (p < .05) older and heavier than the schoolboy forwards. The senior elite forward positional categories were also significantly (p < .05) taller than the schoolboy forward. There however proved to be no significant difference (p > .05) in stature between the backline and schoolboy forwards. All the positional categories proved to have significantly thicker (p < .05) necks, but significantly shorter (p < .05) cervical spines than the schoolboy forwards. The forward positional categories demonstrated to be significantly stronger (p < .05), on all peak torque measures, than the schoolboy forwards. The same was observed between the backline and schoolboy forwards, however no statistically significant difference (p > .05) was observed between the respective sample groups for the measure of peak lateral flexion left torque. For all the measures of power generated at 0.2 of a second, the senior forward positional categories proved to be significantly more powerful (p < .05) than the schoolboy forwards. The senior backline, although significantly more powerful (p < .05) in the flexion movement pattern, proved to be significantly less powerful (p < .05) than the schoolboy forwards in the lateral flexion right movement pattern. No statistically significant differences (p < .05) were found to exist between the senior backline and schoolboy forwards for the extension and lateral flexion left power generated at 0.2 of a second variables. All positional categories proved to have significantly smaller (p < .05) active and passive ranges of motion compared to the schoolboy forwards. Conversely, the senior elite players had significantly larger (p < .05) ratios (PTF/PTE, PTL/PTR, PT/BW and PT/LBM) than the schoolboy forwards. Literature has identified schoolboy rugby as having a much higher incidence of cervical spinal injuries than senior rugby. It can thus be inferred from the above information that the variables of peak torque and power generated at 0.2 of a second play a important role in safeguarding a player from injury on the field of play. Furthermore, calculated ratios show that senior players, especially the forwards, have undergone adaptive changes in cervical musculature strength to meet the requirements of the position they play in, thereby safeguarding themselves from cervical spinal injury. Proper cervical musculature conditioning has been cited in the literature as being an effective but neglected method of preventing cervical spinal injuries. The generation of normative data, concerning cervical musculature performance, can thus be used to prevent the occurrence of cervical injuries and re-injury of the cervical spine by providing a standard of musculature strength for safe participation in rugby, and possibly other collision type sports, and a quantified guide for successful patient rehabilitation respectively.

M.Tech. (Chiropractic) / Objective: To determine the effect of chiropractic adjustive therapy to the lumbar spine and sacroiliac joints on performance indicators such as sprint times and vertical jump height in asymptomatic, moderate-to-highly-active rugby players. Any dysfunction in the spine can affect biomechanics; neurological functioning of the lumbar spine and sacroiliac joints, as well as the surrounding muscles, and can therefore decrease performance. Methods: The study involved 60 asymptomatic male participants who were moderate-to-highly-active individuals as determined by the International Physical Activity Questionnaire (IPAQ). The 60 participants were divided equally into two groups: the experimental group (n=30) received chiropractic adjustments to the lumbar spine and sacroiliac joints, and the control group (n=30) rested for five minutes. The study design was based on the once-off model. The objective data used in the study was obtained by the vertical jump height test and the 30-metre sprint speed test. These tests were used to test the participants‟ explosive power and speed, and were obtained before and after the intervention. The immediate effect was obtained by comparing the measurements of the performance indicators before and after the intervention. Results: The objective results showed that there were improvements in vertical jump height for both the forwards and the backs (rugby players) in the experimental group. Following the chiropractic adjustment, the forwards increased their vertical jump heights by 0.007m (0.5050m-0.4980m) and the backs by 0.017m (0.5245m-0.5075m). In the control group, the forwards jumped 0.01m (0.5071m-0.4971m) lower than before the five-minute rest, and the backs jumped 0.0053m higher (0.5396m-0.5343m). In the sprint speed test, both the forwards and the backs in both the experimental and the control groups performed better when they completed the indicators after the interventions. The forwards in the experimental group ran 0.146s (4.8050s-4.6590s) faster, while the backs ran 0.1055s (4.6040s-4.4985s) faster. In the control group, the forwards ran 0.1358s (5.0329s-4.8971s) faster, while the backs ran 0.0474s (4.6961s-4.6487s) faster. vii Conclusion: In the experimental group, the results demonstrated performance improvements in both the vertical jump height test and the sprint speed test for the forwards as well as the backs. In the control group, the backs performed better in the vertical jump height and the sprint speed test, while the forwards in the control group performed better in the vertical jump height test and worse in the sprint speed test. The improvements in the experimental group occurred for both the forwards and the backs, and were greater than for the control group. It can therefore be suggested that the improvements noted were as a result of the chiropractic adjustments having provided a biomechanical advantage.

Dissertation submitted in partial compliance with the requirements for a Masters Degree in Technology, in the Department of Chiropractic at the Durban University of Technology, 2008 / Introduction: One of the most important responsibilities of a rugby coach towards players is that of injury prevention and advice. Often these responsibilities fall solely on the coach, but sometimes he has the benefit of sports medical personnel at his service. Therefore in order for the coach to best service this sport and industry, his/her knowledge and perception of Chiropractic and other sports medical personnel is critical. Objective: To establish an understanding of Durban rugby coaches’ perceptions and knowledge of Chiropractic to formulate initiatives aimed at bridging gaps and building co-operation between coaches and various medical personnel that they have at their disposal. Methods: A survey was distributed to 149 rugby coaches within 23 high schools and 67 rugby coaches within 24 rugby clubs, resulting in a total of 219 rugby coaches in the greater Durban area received a questionnaire for completion and return. Results: Of the 85 coaches that participated (38.8% response rate), the majority were White (95%), male (99%), with a mean age of 37.36 years and coached at the amateur level (65.1%). School coaches dominated the participants with 67.1% with 61 (71.8%) having obtained a rugby coaching qualification and 26 (30.6%) having another professional sport, fitness or medical qualification besides that of rugby coaching. Most (94.9%) participants referred players to a health professional for examination and / or treatment. This included Physiotherapists, 80% of the time, GPs 70.6% of the time and Chiropractors, 60% of the time. Twenty-nine (34.1%) had a Chiropractor on their medical management team and 28 (96.6%) said it was a positive experience. Of those who did not have a Chiropractor on the team, 82.4% said they would consider it in the future. Over half (65.5%) had personally been treated by a Chiropractor. The 3 most frequent conditions associated with Chiropractic included: Disc herniation (42.6%), low back pain (36.1%) and whiplash (32.8%). Notwithstanding this outcome, the level of knowledge was low with the mean knowledge score (an aggregate knowledge score derived statistically from all questions relating to the knowledge of Chiropractic) of the group was 55.8% (SD 21.9%), even though the range varied from 0 to 96%. Although the coaches’ knowledge of Chiropractic was low, most participants (76.2%) had a favourable view of the Chiropractic profession. Furthermore the coaches perception of Chiropractic related significantly to their knowledge (p = 0.037). In addition the higher their knowledge scores the more positive their view. Conclusion: This study established what knowledge base is available that could promote rugby coaches greater understanding of the Chiropractic profession and related medical personnel. There was a positive association between increased knowledge and a better perception of Chiropractic, suggesting that if knowledge were improved, then perception and attitude towards Chiropractic and related medical personnel would further improve. This increased awareness may improve knowledge, understanding, communication and utilization with the Chiropractic profession and related medical personnel and ultimately these professions within rugby may gain a greater level of acceptance.

M.Phil. / Previously, not much attention was given to vision and visual skills in the everyday sport setting. The attention that it did get was not from optometry and ophthalmology, these two were late comers on this subject, but more and more athletes and coaches are realizing the importance of vision in their sport performance, although vision training were done inadvertently in the past. Sport performance involves motor and vision aspects. If the motor section does not work efficiently, the vision section will be hampered; in return, if the vision section does not work efficiently, the motor section will also be hampered. For this reason, vision was investigated. In this study an investigation was done on 17-year old (n = 35) and 15-year old (n = 28) rugby players. The aim of this study was to determine whether the visual skills of the 17-year-old boys would be better than that of the 15-year-old boys. Both groups were subjected to a battery of eleven rugby related visual tests. The results obtained, show that in some of the software skills such as eye-hand coordination, eye-body coordination and visual reaction time the 17-year-old group performed statistically better (p<0.05) than the 15-year-old group. The latter group only performed statistically better (p<0.05) in skills classified as hardware skills such as static visual acuity, contrast sensitivity and stereopsis. The results showed a general lack of visual skills. Sport specific visual training programmes will be needed to motor performance training if these athletes are going to develop in elite performers. / Professor Jannie Ferreira

M.Phil. / This study consists of three separate publications. The first article attempts to evaluate the difference in the visual skill level of professional versus non-professional rugby players. The software visual skills, involving skills such as eye-hand coordination, eye-body coordination, central-peripheral awareness, and reaction time, were examined. The results indicate that the professional players did out perform the non-professional players on all these skills except for visual concentration. Not all the results were however statistically significant. The importance of the above skills in the game of rugby is discussed and recommendations as to the implementation of vision enhancement programmes are made. The second study explores the importance of the ‘hardware’ factors of the visual system in the game of rugby. A group of professional and club rugby players were tested and the results compared. The results were also compared with the established norms for elite athletes. The findings indicate no significant difference in hardware skills between professional and club players. Compared with the norms for elite athletes, performance of most of the rugby players were average or even worse. This suggests that in the game of rugby the hardware skills may be of lesser importance and that visual enhancement programmes should focus more on improving the players’ software skills. The hardware visual skills should not be neglected though because these provide a base from where the software skills can develop. Thirdly we wanted to determine whether there are a statistically significantly difference between the visual skill levels of forward and back line players in rugby and whether they performed visually according to the norms established for elite athletes. The results indicates that there is much room for improvement for both forward and back line players in eye-hand coordination, visual concentration and central-peripheral awareness because these skills, play an important role in a sport like rugby and because the players under performed according to the established norms. Thus attention should be given to develop the hardware visual skills like accommodation and fusion to an average level of performance, to eliminate any potential limits on the software visual skills. Consistent, position specific visual training should be incorporated in the daily training routine of these players to develop the software visual skills to their full potential. / Prof. Jannie Ferreira

Rugby, an intensely physical team game that emphasised the contribution of players of disparate skills and strengths, was ideal for New Zealand's early European pioneers. It also suited the nature of the indigenous people. Rugby club competitions and provincial matches provided a significant social fulcrum and a means of playing out regional rivalries. Arduous, but ultimately successful rugby tours to Britain and Ireland, brought Pakeha and Maori together and helped to shape the young colony's self-image. New Zealand's commitment to its national game became instrumental in rugby's steadily growing international popularity.Although rugby had significant commercial appeal, it remained an amateur sport in deference to its British originators. Nevertheless, New Zealand's hosting of the inaugural Rugby World Cup in 1987 coincided with the development of global media networks. By the third Rugby World Cup tournament in 1995, substantial commercial interest in the game meant that a transition to a professional structure was inevitable. Rugby appealed to media conglomerates needing new televisual product that would attract subscribers to growing pay-TV networks.Although the introduction of professionalism was a major commercial success, the commercial imperatives imposed allowed rugby to be dominated by those with the most financial and player resources. As a consequence, New Zealand's traditional advantages were diluted. This generated considerable tension between New Zealand's professional game and its amateur grassroots level that has been rugby's traditional base. While supplying the game's players and supporters, grassroots rugby has been the level of the game most vulnerable to the negative impact of professionalisation.To generate the income to adequately fund the game's grassroots, it is critical that New Zealand's leading teams remain among the world's best. However, the professionalisation of rugby has made winning far more difficult than ever before. New Zealand rugby's challenge is to mitigate the commercial imperatives that place it at a significant disadvantage in the international game.

Dissertation submitted in partial compliance with the requirements for a Masters Degree in Technology, in the Department of Chiropractic at the Durban University of Technology, 2008 / Introduction: One of the most important responsibilities of a rugby coach towards players is that of injury prevention and advice. Often these responsibilities fall solely on the coach, but sometimes he has the benefit of sports medical personnel at his service. Therefore in order for the coach to best service this sport and industry, his/her knowledge and perception of Chiropractic and other sports medical personnel is critical. Objective: To establish an understanding of Durban rugby coaches’ perceptions and knowledge of Chiropractic to formulate initiatives aimed at bridging gaps and building co-operation between coaches and various medical personnel that they have at their disposal. Methods: A survey was distributed to 149 rugby coaches within 23 high schools and 67 rugby coaches within 24 rugby clubs, resulting in a total of 219 rugby coaches in the greater Durban area received a questionnaire for completion and return. Results: Of the 85 coaches that participated (38.8% response rate), the majority were White (95%), male (99%), with a mean age of 37.36 years and coached at the amateur level (65.1%). School coaches dominated the participants with 67.1% with 61 (71.8%) having obtained a rugby coaching qualification and 26 (30.6%) having another professional sport, fitness or medical qualification besides that of rugby coaching. Most (94.9%) participants referred players to a health professional for examination and / or treatment. This included Physiotherapists, 80% of the time, GPs 70.6% of the time and Chiropractors, 60% of the time. Twenty-nine (34.1%) had a Chiropractor on their medical management team and 28 (96.6%) said it was a positive experience. Of those who did not have a Chiropractor on the team, 82.4% said they would consider it in the future. Over half (65.5%) had personally been treated by a Chiropractor. The 3 most frequent conditions associated with Chiropractic included: Disc herniation (42.6%), low back pain (36.1%) and whiplash (32.8%). Notwithstanding this outcome, the level of knowledge was low with the mean knowledge score (an aggregate knowledge score derived statistically from all questions relating to the knowledge of Chiropractic) of the group was 55.8% (SD 21.9%), even though the range varied from 0 to 96%. Although the coaches’ knowledge of Chiropractic was low, most participants (76.2%) had a favourable view of the Chiropractic profession. Furthermore the coaches perception of Chiropractic related significantly to their knowledge (p = 0.037). In addition the higher their knowledge scores the more positive their view. Conclusion: This study established what knowledge base is available that could promote rugby coaches greater understanding of the Chiropractic profession and related medical personnel. There was a positive association between increased knowledge and a better perception of Chiropractic, suggesting that if knowledge were improved, then perception and attitude towards Chiropractic and related medical personnel would further improve. This increased awareness may improve knowledge, understanding, communication and utilization with the Chiropractic profession and related medical personnel and ultimately these professions within rugby may gain a greater level of acceptance.

Thesis (MAppSc in Physiotherapy)--University of South Australia, 1996

Rugby, an intensely physical team game that emphasised the contribution of players of disparate skills and strengths, was ideal for New Zealand's early European pioneers. It also suited the nature of the indigenous people. Rugby club competitions and provincial matches provided a significant social fulcrum and a means of playing out regional rivalries. Arduous, but ultimately successful rugby tours to Britain and Ireland, brought Pakeha and Maori together and helped to shape the young colony's self-image. New Zealand's commitment to its national game became instrumental in rugby's steadily growing international popularity.Although rugby had significant commercial appeal, it remained an amateur sport in deference to its British originators. Nevertheless, New Zealand's hosting of the inaugural Rugby World Cup in 1987 coincided with the development of global media networks. By the third Rugby World Cup tournament in 1995, substantial commercial interest in the game meant that a transition to a professional structure was inevitable. Rugby appealed to media conglomerates needing new televisual product that would attract subscribers to growing pay-TV networks.Although the introduction of professionalism was a major commercial success, the commercial imperatives imposed allowed rugby to be dominated by those with the most financial and player resources. As a consequence, New Zealand's traditional advantages were diluted. This generated considerable tension between New Zealand's professional game and its amateur grassroots level that has been rugby's traditional base. While supplying the game's players and supporters, grassroots rugby has been the level of the game most vulnerable to the negative impact of professionalisation.To generate the income to adequately fund the game's grassroots, it is critical that New Zealand's leading teams remain among the world's best. However, the professionalisation of rugby has made winning far more difficult than ever before. New Zealand rugby's challenge is to mitigate the commercial imperatives that place it at a significant disadvantage in the international game.