Doctorat en Sciences de la motricité / info:eu-repo/semantics/nonPublished

M.Phil. (Sport Management) / Available literature revealed a gap in the body of knowledge regarding the effect of environmental and related factors on the performance of elite under 17 judokas in South Africa in order to address the lack of available research. Scholars increasingly researched the social importance attached to the performance of athletes and the competitive environment, including the role of social agents and simulated training. The aim of this study translates into objectives, namely: i) to describe the sport competition environment through an extensive literature study, ii) to determine the effect of environmental and selected physical factors (sleep and nutrition) on the performance of elite judokas in South Africa in the under 17 age category with a self-designed questionnaire, iii) to determine psychosocial effects on judo performance with the Sport Competition Anxiety Test (SCAT) and the Sports Mental Toughness Questionnaire (SMTQ), iv) to determine the effect of environmental factors, selected physical factors and psychosocial factors on the performance of elite under 17 judokas with a focus group, v) to determine the effect of environmental, psychosocial and selected physical factors on the performance of elite judokas from the perspective of judo coaches by way of interviews, and vi) to conduct a comparative analysis based on various variables such as gender, locality, frequency of competition participation and access to resources. Both qualitative and quantitative data were gathered, constituting an exploratory research design. Questionnaires (SCAT and SMTQ) and qualitative data was gathered by way of interviews with judo coaches (n=8) and a focus group with judokas (n=8). In total sixty five (n=65) judokas participated in this study. A purposive sample of coaches and elite judokas were recruited as research participants. Results indicate that judokas have relatively moderate mental toughness (M=41.66) and that mentally tougher judokas experience relatively less anxiety whilst competing (r=-.48, n=60, p<.01). An increase in anxiety is correlated with a decline in performance and medal winning judokas were relatively more confident than non-medal winners. All research participants were negatively affected by not having adequate exposure to environmental simulated training conditions, with temperature as a main factor impacting on performance.

The present investigation attempted to determine whether imagery combined with relaxation (VMBR) facmlitated karate performance more effectively than either imagery or relaxation alone. Each subject (N=30) was randomly assigned to either a VMBR, relaxation, imagery or placebo control condition. Trait anxiety tests were administered at the beginning and the end of the six week test period. Performance tests were administered at the final class period along with precompetitive state anxiety. Trait anxiety results indicated a reduction in trait anxiety for all groups. State anxiety results indicated that the VIYBR and relaxation groups exhibited less state anxiety than the imagery and control groups. Performance results produced a main effect only for sparring with the VMBR group exhibiting better performance than all other groups.