The measurement of maximum anaerobic alactacid powder in males and females

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Abstract
The external power output in kgm/s and vertical velocity in m/s attained by 24 female and 24 male subjects was studied during the following stair run tests: 2 m run-up negotiating 2 steps at a time, 6 m run-up negotiating 3 steps at a time, 2 m run-up negotiating 3 steps at a time and 6 m run-up negotiating 2 steps at a time. The steps were approximately 16.5 cm in height. Two timers were connected to photoelectric beam circuits and switchmats which were placed on the 8th and 12th steps when the subjects ran up the steps 2 at a time and on the 3rd and 9th steps when they ran up the steps 3 at a time. The photoelectric beam circuit and switchmat data were analyzed separately for each sex by a 3 (high, medium and low leg length) .times. 2 (2 and 6 m run-up) .times. 2 (2 and 3 steps at a time) ANOVA repeated measures factorial design. In each of the 8 analyses, significantly (P < 0.05) greater scores were attained with a 6 as compared to a 2 m run-up and with negotiating 3 as compared to 2 steps at a time. These main effects must be interpreted in conjunction with a significant run-up .times. steps interaction which indicated that the length of the run-up had no significant effect when 2 steps were negotiated at a time. Increasing the length of the run-up resulted in a significant increase when 3 steps were negotiated at a time. There was a significant main effect for leg length with the external power output in kgm/s for the males. Those subjects in the high group scored significantly greater than those in the low group. A similar, though non-significant trend (P < 0.07), was observed with females. Photoelectric beam circuits yielded significantly higher scores than switchmats. Of the 4 stair run protocols investigated in this study, the highest scores occurred with a 6 m run-up, negotiating three 16.5 cm steps at a time and placing photoelectric beam circuits connected to a timer on the 3rd and 9th steps.

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