lit.min.AP: Estimate Time in Light Intensity Activity

In activpalProcessing: Process activPAL Events Files

Description

This function estimates time spent in light intensity activity. Light intensity activity is activity in the standing or stepping posture and between 1.5-2.99 METs.

Usage

lit.min.AP(mets, posture, epoch = 1)

Arguments

mets	mets is a vector of met values
posture	posture is a vector of values 0-2 indicating 0=sitting, 1=standing, 2=stepping
epoch	numeric value indicating what epoch (in seconds) the data are in (e.g. 60 = 1 minute epochs). The default value is 1 second

Details

The default settings of the AP assign a met value of 1.25 to sitting, 1.4 to standing and estimates a met value for stepping activities. Cadence is used to estimate mets for stepping. Although the default met value for standing is 1.4, which is below the traditional met threshold for light intensity, standing is always considered light because it is an upright posture and only seated activities are considered sedentary

Value

a numeric value indicating hours spent in light intensity activity

Author(s)

Kate Lyden

See Also

sed.min.AP mvpa.min.AP

Examples

	
data(second.by.second.data)
mets <- second.by.second.data$mets	
posture <- second.by.second.data$ap.posture
lit.min.AP(mets,posture,epoch=1)

activpalProcessing documentation built on May 2, 2019, 2:17 a.m.