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Table 1 Description of the differences between the 2006 Crouter 2-Regression Model (2006 C2RM) and Refined Crouter 2-Regression Model (Refined C2RM)

From: Validity of estimating minute-by-minute energy expenditure of continuous walking bouts by accelerometry

Model

Inactivity Threshold

Determination of Variability

Determination of CV**

If CV ≤10%

If CV > 10%

2006 C2RM

50 counts min-1

six consecutive 10-s epochs

CV among 6 consecutive 10-s epochs

Walk/run equation

Intermittent lifestyle equation

Refined C2RM

8 counts per 10 s

Examines all combinations of surrounding five 10-s epochs*

Lowest CV out of all possible combinations

Walk/run equation

Intermittent lifestyle equation

  1. *Examination includes 10-s epoch of interest and five before, 10-s epoch of interest and four epochs before and one after, etc.
  2. **CV: coefficient of variation