TABLE 1

Physical and Mental Activity Diary Metrics

PARIntervals Recorded
1–3 d4–10 d
Physical activity scale
 A: Sleeping (resting in bed)0.9515 min/dh/d
 B: Sitting (eating, writing, using the computer, etc)1.515 min/dh/d
 C: Standing (washing, combing, shaving, cooking, etc)215 min/dh/d
 D: Walking indoors (light home activities)2.815 min/dh/d
 E: Walking outdoors (light manual work)3.315 min/dh/d
 F: Low Intensity Activity (golf, gardening, biking [<6 mph], table tennis, etc)4.415 min/dh/d
 G: Moderate-intensity activity (jogging, biking 7–12 mph, hiking, horseback riding, dancing, snow shoveling, loading and unloading goods, etc)6.515 min/dh/d
 H: High-intensity activity (running [<6 mph], bicycling [>12 mph], swimming, tennis, basketball, football, soccer, wt training, carrying heavy load upstairs, etc)10.015 min/dh/d
 I: Maximum-intensity activity (very high to maximal intensity: competitive running [>6 mph], cross-country skiing, etc)15.015 min/dh/d
Mental activity
 (Low) Listening to music/radio or readingn/ah/dh/d
 (Low) Watching TV, surfing the internet, or playing video gamesn/ah/dh/d
 (Moderate) In the classroom during schooln/ah/dh/d
 (Moderate) After-school activities, clubs or jobn/ah/dh/d
 (High) Working on homework or studyingn/ah/dh/d
 (High) Taking quizzes, tests, and or giving presentationsn/ah/dh/d
  • Calculations were as follows. Basal Metabolic Rate (BMR) calculated by using Schofield equation: Male, BMR = 0.074 × wt (kg) + 2.754 MJ/d; female, BMR = 0.056 × wt (kg) + 2.898 MJ/d. Total energy expenditure (TEE) calculated by summing the number of 15-min periods for each categorical value (A–I). Each result was then multiplied by its respective PAR and the subjects predicted BMR. Totals were then added to determine 24-h exertion. Activity-related energy expenditure calculated by subtracting BMR from TEE. Physical activity level (PAL) calculated by dividing TEE by BMR. PAR, physical activity ratio.