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P3 latencies for young and older men undergoing low and high aerobic fitness. While P3 latency occurred significantly later for the older as compared to young men, the age effect was mostly due to very long P3 latencies of the older low fit men. Each mean was based on data for 15 subjects. The error bars are standard errors of the mean. Reprinted, with permission, from reference (55), p. 198.
