Table 2.
Weighted Means and Percentages of Accelerometer-Assessed Physical Activity and Sedentary Behavior (n = 3,809), National Health and Nutrition Examination Survey, 2003–2006
| Accelerometer Measure | Definition in Counts per Minute | No. | Weighted Mean (SE) | Weighted % (SE) |
|---|---|---|---|---|
| Average counts per minute | 3,809 | 295.2 (3.1) | ||
| Physical activity using Troiano et al. (8) cutpoint, minutes/day | 3,809 | |||
| Light | 100–2,019 | 332.9 (2.0) | ||
| Moderate | 2,020–5,998 | 19.4 (0.5) | ||
| Vigorous | ≥5,999 | 0.7 (0.1) | ||
| Moderate-to-vigorous | ≥2,020 | 20.1 (0.6) | ||
| Moderate-to-vigorous boutsa | ≥2,020 | 5.9 (0.3) | ||
| Physical activity using Matthews (9) cutpoint, minutes/day | 3,809 | |||
| Light | 100–759 | 258.6 (1.3) | ||
| Moderate-to-vigorous (lifestyle)b | ≥760 | 102.1 (1.5) | ||
| Moderate-to-vigorous boutsa (lifestyle)b | ≥760 | 37.0 (1.0) | ||
| Moderate (lifestyle) | 760–2,019 | 82.0 (1.1) | ||
| Sedentary behavior using Matthew et al. (36) cutpoint, minutes/day | ||||
| Sedentary behavior | <100 | 3,809 | 505.9 (3.2) | |
| Sedentary boutsc | <100 | 3,809 | 389.9 (3.8) | |
| Accelerometer assessed physical activity | ||||
| High activity | 356 | 11.1 (0.8) | ||
| Medium activity | 718 | 22.2 (1.1) | ||
| Not meeting recommendations | 2,735 | 66.7 (1.4) |
Abbreviation: SE, standard error.
a A moderate-to-vigorous physical activity bout was defined as ≥10 minutes of consecutive moderate-to-vigorous physical activity, with allowance for interruptions for up to 20% of the time below the threshold and <5 consecutive minutes below the threshold.
b Lifestyle refers to a lower moderate to vigorous physical activity definition that includes activities that may not be aerobic.
c Sedentary bouts were defined as having ≥30 minutes with at least 80% of the minutes falling below the sedentary threshold, allowing for <5 consecutive minutes above the threshold.