https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 The incidence of musculoskeletal disorders and stakeholder perceptions of work challenges in South-Eastern Nigerian quarry mining industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:37957 Wed 12 May 2021 23:45:28 SAST ]]> A field investigation of physical workloads imposed on harvesters in South African forestry https://vital.seals.ac.za/vital/access/manager/Repository/vital:5122 Wed 12 May 2021 20:03:56 SAST ]]> The effects of a gradual shift rotation and a split shift nap intervention on cognitive, physiological and subjective responses under simulated night shift settings https://vital.seals.ac.za/vital/access/manager/Repository/vital:19966 Wed 12 May 2021 19:22:21 SAST ]]> Three dimensional kinetic analysis of asymmetrical lifting https://vital.seals.ac.za/vital/access/manager/Repository/vital:5174 Wed 12 May 2021 18:52:21 SAST ]]> Field and laboratory analyses of manual tasks in the South African automotive industry https://vital.seals.ac.za/vital/access/manager/Repository/vital:5121 Wed 12 May 2021 16:24:34 SAST ]]> The application of human factors and ergonomics (HFE) to community-sport organisations in resource scarce contexts: a case study of grassroots football in Makana, Eastern Cape https://vital.seals.ac.za/vital/access/manager/Repository/vital:42198 Wed 12 May 2021 14:30:44 SAST ]]> Strength and conditioning of adolescent male cricket players https://vital.seals.ac.za/vital/access/manager/Repository/vital:28508 Wed 03 May 2023 13:07:18 SAST ]]> Strength training and cardiovascular risk post-menses, with particular emphasis on the plasma lipoproteins: a controlled trial https://vital.seals.ac.za/vital/access/manager/Repository/vital:5155 Thu 13 May 2021 07:27:29 SAST ]]> A holistic investigation of amateur batters performance responses to a century protocol: a focused cognitive perspective https://vital.seals.ac.za/vital/access/manager/Repository/vital:25020 0.05; d<0.2), the magnitude of impairment in psychomotor function (p>0.05; d = 0.37), visual attention (p>0.05; d = 0.56), working memory (p>0.05; d = 0.61) and executive function (p>0.05; d = 0.58) was larger in schoolboy batters. In both samples, the simulation altered the modulation of heart rate significantly. Heart rate variability decreased linearly with time spent batting (p<0.01; d>0.8). During cognitive assessments, heart rate variability increased with time-on-task, where responses were significantly higher (p<0.05) in the last task of the battery compared to the first. Importantly, the results of the retest phase were the same as in the test phase and only two condition effects were observed; (i) heart rate (retest lower: p<0.04;d = 0.39), (ii) body mass (retest lower: p<0.03;d = 0.09). A task-related condition effect in heart rate variability (PNN30) was also observed (retest higher: p<0.03; d = not calculated). Resultantly, the test-retest reliability of phase 2 and 3 was high. The results indicate that prolonged intermittent batting at an intensity of 64-77 %HRmax impaired cognitive functioning in amateur batters. However, the cardiovascular and muscular strain induced by prolonged intermittent batting and its effects on cognitive functioning are mediated by intrinsic and extrinsic factors (age, training status, playing experience and hydration). Therefore, while prolonged batting has similar effects on cognitive functioning as acute bouts of physical activity, they do not share the same relationship. The author hypothesises that the continuous cognitive component inherent in prolonged batting mitigates the beneficial effects of physical activity, as demonstrated previously. Future research is needed to elucidate this relationship. Additionally, player experience affects the way in which batters regulate performance while batting; which also affects the rate of and magnitude of impairment during batting. Finally, the methodological limitations of this study provide direction for future research into batting.]]> Thu 13 May 2021 07:01:38 SAST ]]> The effects of whole body immersion in cold water upon subsequent terrestrial aerobic performance : a study in hypothermia https://vital.seals.ac.za/vital/access/manager/Repository/vital:5143 Thu 13 May 2021 02:25:57 SAST ]]>