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Evaluation of the laboratory based football-specific treadmill protocol and the effect of high ambient temperature on physiological responses. Introduction The physiological demand in soccer is a significant factor that determines performance. In a match, players are required to perform different types of exercise, from walking, jogging, sprinting, jumping, to tackling, and the intensity varies accordingly (Bangsbo, 1994). On average, an outfield player has to cover 8-12 km during the course of a match (Reilly, 1996). Results from Reilly et al. (2000) indicated that a soccer player has to run with effort every 90 seconds and input high-intensity efforts every 30 seconds. Hence, the ability to endure and exercise with high power output becomes very important. Whether or not a player could sustain this high work rate depends on the body's energy production mechanisms. Meyhew and Wenger (1985) found that 88% of a game is aerobic in nature while Bangsbo (1997) argued that...

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