How do I know if my child's aerobic activity is moderate- or vigorous-intensity?

:cdc.gov

2012/10/09

990

Here are two ways to think about moderate- and vigorous-intensity:

As a rule of thumb, on a scale of 0 to 10, where sitting is a 0 and the highest level of activity is a 10, moderate-intensity activity is a 5 or 6. When your son does moderate-intensity activity, his heart will beat faster than normal and he will breathe harder than normal. Vigorous-intensity activity is a level 7 or 8. When your son does vigorous-intensity activity, his heart will beat much faster than normal and he will breathe much harder than normal.
Another way to judge intensity is to think about the activity your child is doing and compare it to the average child. What amount of intensity would the average child use? For example, when your daughter walks to school with friends each morning, she's probably doing moderate-intensity aerobic activity. But while she is at school, when she runs, or chases others by playing tag during recess, she's probably doing vigorous-intensity activity.

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Fitness