Table 1.

Description of the 12 activity trials

Activity Type	Activity Trial	Intensity	Description of Activity Trial
Resting	Lying Down (LD)	Sedentary	Lie on floor mat or cot in supine position., awake with arms at side. Instructed to minimize all bodily movements.
Sitting	Hand writing (HW)	Sedentary	While sitting in a chair at a desk, use a ball point pen and a pad of paper to transcribe a standardized written script.
	Computer game (CG)	Sedentary	Seated in a chair at a desk and playing a self- selected on-line computer game. Game is played by using keyboard and/or mouse
Lifestyle	Sweeping Floor (SW)	Light	Within a 5′ × 10′ area, sweep confetti on floor continuously with a broom into a marked 1′ × 1′ box at both ends and repeating.
	Throw and Catch (TC)	Light	Underarm throw and catch a ball while standing 5–10 ft from a research assistant at rate of 15 throws per min. Distance = 5 ft for ages 6–7 y, 8 ft for ages 8–11 y, and 10 ft for ≥ 12 y.
	Laundry Task (LT)	Light	Load a laundry basket with 5 towels and carry it 10 feet; then dump out the towels, fold them, load them back in the basket, carry it back to the original starting spot and repeat.
	Aerobics (AE)	Moderate	Follow a simple aerobics video. Routine included simple arm and leg movements. Marching in place and touch steps with bicep curls and upright rows.
	Basketball (BB)	Vigorous	Shoot a basketball using an 8 ft or regulation hoop. Shoot the ball, rebound and chase after the ball continuously. Participant instructed to keep the ball within 15′ × 15′ boundary. Given a new basketball if it leaves the boundary.
Ambulatory	Comfortable walk (CW)	Light	Walk at a self-selected comfortable speed around the marked perimeter of an indoor gymnasium (1 lap = 63 m).
	Brisk walk (BW)	Moderate	Walk at a self-selected brisk speed around the marked perimeter of an indoor gymnasium (1 lap = 63m)
	Brisk walk (TM)	Moderate	Walk on a treadmill at speed equal to that achieved during the brisk walking trial.
	Run (RU)	Vigorous	Run at a self-selected speed around the marked perimeter of an indoor gymnasium (1 lap = 63m)