James Clark- University of Pretoria
James Clark
- University of Pretoria
About
9
Publications
1,912
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
212
Citations
Introduction
Current institution
Publications
Publications (9)
Objective. Despite their widespread use in exercise testing, few data are available on the effect of wearing respiratory gas collection (RGC) systems on exercise test performance. Industrial-type mask wear is thought to impair exercise performance through increased respiratory dead space, flow resistance and/or discomfort when compared with RGC fac...
Sport has become increasingly competitive and this places enormous pressure on sportsmen to perform at their absolute best. For athletes to achieve their greatest potentials, aspects of sport such as reaction time and hand-eye coordination need to be at their peaks. Sports vision aims to enhance performance through a variety of procedures and train...
Better running economy (i.e. a lower rate of energy consumption at a given speed) is correlated with superior distance running performance. There is substantial variation in running economy, even among elite runners. This variation might be due to variation in the storage and reutilization of elastic energy in tendons. Using a simple musculoskeleta...
Objective. Despite their widespread use in exercise testing, few data are available on the effect of wearing respiratory gas collection (RGC) systems on exercise test performance. Industrial-type mask wear is thought to impair exercise performance through increased respiratory dead space, flow resistance and/or discomfort when compared with RGC fac...
The purpose of this study was to describe the physical fitness of professional soccer players in South Africa and assess the difference in fitness status between different playing positions. Professional soccer players (N = 140) from various clubs in the Premier Soccer League (PSL) in South Africa underwent a battery of tests assessing key physiolo...
Objective. To assess the difference in physical fitness of players in successful versus less-successful professional soccer teams in South Africa. Design. Professional soccer players (N = 140) underwent a battery of tests assessing important physiological components during the early part of their competitive season. Players were then separated into...
