Rushall Thoughts, (1997).

Generally, physiology tests, such as step tests, tests of anaerobic threshold, etc. are only good for measuring changes from non- or lowly-trained states to moderately enhanced states. Although some tests report changes is anaerobic thresholds with exposure to altitude, or some form of changed training regime, they are generally assessments with low reliability (one-off tests). To show an effect is consistent, lasting, and not a chance occurrence, good design would have the test repeated at least several days later to assess if consistency or further changes had occurred. This is rarely done.

However, there is a considerable body of evidence that shows when elite athletes are trained, their physiological parameters remain stable and undergo no further change except under conditions which lead to detraining. Continued performance improvements come from other facets of exercise. More economical technique, better mental coping and application (focus) and quite often, just the athletes wanting (for want of a better word) to perform better (Wilmore, 1970) are possible causes.

[Wilmore, J. (1970). Influence of motivation on physical work capacity and performance. In W. P. Morgan, (Ed.), Contemporary readings in sport psychology. Springfield, IL: Charles C. Thomas.]

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