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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Med Sci Sports Exerc. 2010 May;42(5):1029–1037. doi: 10.1249/MSS.0b013e3181c37458

Appendix Table 4.

Depiction of how METs are calculated using the 2006 Crouter 2-regressin model and the refined 2-regression model.

Time Counts
per 10-s
2006
CV
CV
Forward
5
CV
Back
5
CV
back 1
forward
4
CV
back 2
forward
3
CV
back 3
forward
2
CV
back 4
forward
1
Lowest
CV
2006
Crouter 2-
regression
model
METs
Refined
10
second
MET
Value
Refined
Average
MET
value for
minute
13:02:10 918 1.670 1.67 1.67 5.01 4.99 4.99
13:02:20 907 3.15 1.67 1.67 4.95
13:02:30 936 3.46 3.15 1.67 1.67 5.07
13:02:40 923 23.95 3.46 3.15 1.67 1.67 5.01
13:02:50 927 56.65 1.17 23.95 3.46 3.15 1.67 1.17 5.03
13:03:00 893 58.76 1.67 56.65 23.95 3.46 3.15 1.67 4.89
13:03:10 858 60.204 60.2 3.15 58.76 56.65 23.95 3.46 3.15 6.95 4.74 5.15
13:03:20 877 3.46 60.2 58.76 56.65 23.95 3.46 4.82
13:03:30 421 23.95 60.2 58.76 56.65 23.95 5.83
13:03:40 0 56.65 60.2 58.76 56.65 1.00
13:03:50 556 58.76 60.2 58.76 6.47
13:04:00 996 60.2 60.2 8.04

For the 2006 Crouter 2-regression model a MET value is calculated for each minute on the ActiGraph clock, based on the coefficient of variation (CV) of the six consecutive 10-sec epochs for that minute. For the refined 2-regression model the MET value is calculated for each 10-sec epoch, based on the lowest CV for that 10-sec epoch and all combinations of the surrounding five 10-sec epochs, and then an average MET value is calculated for each minute.