MVPA: Moderate to Vigorous Physical Activity Summary

In PAactivPAL: Summarize Daily Physical Activity from 'activPAL' Accelerometer Data

Description

Summarize moderate to vigorous activity measures

Usage

MVPA(final_dat, bed_time, takeoff_time)

Arguments

final_dat	Raw event file, will be cleaned in this function. Event file is required for this function.
bed_time	Sleep and wake up time log, reported by participants. Log is not required for this function.
takeoff_time	Take on and off time log, reported by participants. Log is not required for this function.

Details

MVPA is defined into two types: long bout MVPA and sporadic MVPA. Long bout MVPA is defined as 10 consecutive minutes with METs>=3 (allowing 2 min below that threshold). Sporadic MVPA is defined as activities at any time with METS>=3 and they are not in long bouts MVPA.

Highest METs values in 15 second/10 minutes are calculated by picking up the maximum METs values from the combined data with 15 second intervals and the data with 10 minutes intervals, respectively.

Function MVPA() takes longer running time than other functions as its nature of more complex calculation.

Value

Year The calendar year of recorded event

Month The calendar month of recorded event

Day The calendar day of recorded event

Dayofweek The day of that week

Weekday_or_weekend The recored event date is a weekday or weekend (0 for weekday, 1 for weekend)

Total_light_time Total light time: total activity minutes minus the total MVPA hours

Total_MVPA_time Total MVPA hours: summation of the total long bouts MVPA and total sporadic MVPA durations

Total_MVPA_Long_Bout_time Total MVPA long bout time: summation of the total long bouts MVPA durations

Total_mvpa_sporadic_time Total MVPA sporadic time: summation of the total sporadic MVPA durations

Total_Number_of_MVPA_Long_Bouts_and_Sporadic Total Number of MVPA (long bouts or sporadic): count the number of MVPA from 15 second data

Proportion_of_MVPA_Long_Bouts_and_Sporadic_greater_2 Proportion of MVPA (long bouts or sporadic) greater than 2 minutes

Proportion_of_MVPA_Long_Bouts_and_Sporadic_greater_5 Proportion of MVPA (long bouts or sporadic) greater than 5 minutes

Proportion_of_MVPA_Long_Bouts_and_Sporadic_greater_10 Proportion of MVPA (long bouts or sporadic) greater than 10 minutes

Total_Number_of_MVPA_Long_Bouts Total number of long bouts MVPA: count the number of long bouts MVPA from 10 minute data

Mean_MVPA_Long_Bout_Length Mean of long bout MVPA length

Proportion_of_MVPA_Long_Bouts_greater_10 Proportion of long bouts MVPA greater than 10 minutes

Proportion_of_MVPA_Long_Bouts_greater_20 Proportion of long bouts MVPA greater than 20 minutes

Highest_MET_value_15s Highest METs values in 15 second

Highest_MET_value_10min Highest METs values in 10 minutes

Total_MET_hrs_Long_Bouts_and_Sporadic_mvpa Total METs hours from long bouts MVPA and sporadic MVPA: the summation of METs hours from all MVPA records

Total_MET_hrs_Long_Bouts Total METs hours from long bouts MVPA: the summation of METs hours from long bouts MVPA records

Examples

#For CRAN less than 5s running time policy, we only select the first day to run.
r3=MVPA(sample_event[1:3095,],sample_bed_time[1,],sample_takeon_log[1,])
summary(r3)

Example output

$call
MVPA.default(final_dat = sample_event[1:3095, ], bed_time = sample_bed_time[1, 
    ], takeoff_time = sample_takeon_log[1, ])

$Table
     Year Month Day Dayofweek Weekday_or_weekend Total_light_time
year 2000     1   1         6                  0        0.8757778
     Total_MVPA_time Total_MVPA_Long_Bout_time Total_mvpa_sporadic_time
year           0.375                         0                    0.375
     Total_Number_of_MVPA_Long_Bouts_and_Sporadic
year                                           24
     Proportion_of_MVPA_Long_Bouts_and_Sporadic_greater_2
year                                             8.333333
     Proportion_of_MVPA_Long_Bouts_and_Sporadic_greater_5
year                                                    0
     Proportion_of_MVPA_Long_Bouts_and_Sporadic_greater_10
year                                                     0
     Total_Number_of_MVPA_Long_Bouts Mean_MVPA_Long_Bout_Length
year                               0                          0
     Proportion_of_MVPA_Long_Bouts_greater_10
year                                        0
     Proportion_of_MVPA_Long_Bouts_greater_20 Highest_MET_value_15s
year                                        0               3.92784
     Highest_MET_value_10min Total_MET_hrs_Long_Bouts_and_Sporadic_mvpa
year                2.770533                                   1.378771
     Total_MET_hrs_Long_Bouts
year                        0

attr(,"class")
[1] "summary.MVPA"

PAactivPAL documentation built on May 30, 2017, 4:33 a.m.