It may be possible that using a less stringent definition of insufficient physical activity or using a definition referring to intensive physical exercise would have resulted in differences between groups.
The strengths of the study are the stringent methodological design including a clearly defined physical activity intervention, stress test, and food exposure in both NW and OW/OB children, all of which are difficult to perform with prepubertal children.
Sensitivity analyses using a more stringent 120-mg cutoff for accelerometer-assessed moderate-to-vigorous physical activity produced results of a pattern and magnitude similar to that of the main analyses (Supplemental Table 4).
Separating leisure time physical activity "elsewhere" from that "at home" led to a more stringent measure of physical activity during leisure, as confirmed by its clear association with HRV.
The reader can interpret the exploratory physical activity barriers findings with regard to the least and most stringent measures for statistical significance.
We also repeated each analysis using a more stringent cutoff of 120 mg (instead of 100 mg) to define moderate-to-vigorous physical activity.
New York City, for example, recently enacted nutrition and physical activity regulations in Article 47 of the New York City health code that were more stringent than those for New York State.
Greater physical activity?
The innovation motivated by such stringent physical limitations is striking.
