FIGURE 3.

Estimated energy expenditure in NCAA Division I cross country student-athletes during a competitive season. REE was calculated using the Mifflin-St Jeor equation, and EEE was estimated for each day from training logs using the compendium of physical activities. TDEE was calculated as the sum of REE and EEE. In females and males, mean ± SD TDEE was calculated for each training day (A) and week (B), and mean ± SD running miles were calculated for each week (C). Differences in weekly TDEE and mileage were assessed by 2-way repeated measures ANOVAs with main effects of sex, time, and the sex∗time interaction. One-way repeated measures ANOVAs with Bonferroni’s post hoc comparisons assessed time differences within a sex. Numerical superscripts indicate differences compared to weeks 1, 2, and 3 (P < 0.05). For each training week, mean ± SD EEE was estimated for running, nonrunning endurance training, and resistance training in females (D) and males (E). Across the entire season, the percent contributions to total EEE for running, nonrunning endurance training, and resistance training and their distribution by day of the week were determined in females (F) and males (G). ANOVA, analysis of variance; EEE, exercise energy expenditure; NCAA, National Collegiate Athletic Association; REE, resting energy expenditure; TDEE, total daily energy expenditure.