Effect of different workloads varying in intensity and duration on resolution acuity.

An experiment was conducted to determine the effect of participation in physical activity on resolution acuity. In the experiment, 21 undergraduate males participated in exercise sessions with work loads of 300, 700, and 1100 kmp for durations of 3 and 6 min. and a non-exercise control session. Resolution acuity was then determined by finding thresholds of a 20-cpd sinusoid-wave grating using the method of adjustment. A repeated-measures analysis of variance compared the effects of different workloads, intensities, and durations of workloads, and the interaction of intensity and duration on resolution acuity. Significant improvement of resolution acuity was found for all workloads relative to the non-exercise control session, for all other workloads relative to the 300 kpm/3 min. workload, and for the 1100 kpm/6 min. workload relative to the 300 kpm/6 min. and the 700/3 min. workloads. Increases in duration or intensity of exercise significantly improved resolution acuity. There was no significant interaction of the variables of intensity and duration of work on resolution acuity.