Cognitive performance was hypothesized to be lower in a group of college football players who had endured strenuous physical exercise and consumed high carbohydrate and high fat intake.  Cognitive functioning and attention was measured using various tests, including the Connors’ Continuous Performance Test (CPT) and the Wechsler Memory Scale-III (WMS-III).  All subjects had participated in a two-hour practice session approximately 2 hours earlier. Food intake in the past 24 hours was measured in order to determine dietary measures of carbohydrates, fats, and proteins.  Those who reported eating a large amount of carbohydrates and fat prior to participating in the CPT had significantly lower attention scores than their counterparts.  The high carbohydrate/high fat group also performed at a lower level in a memory test (WMS).  This has implications for study habits of college athletes, many of whom study after practice when their performance level is not optimal.