Summarize moderate to vigorous activity measures
MVPA(final_dat, bed_time, takeoff_time)
Raw event file, will be cleaned in this function. Event file is required for this function.
Sleep and wake up time log, reported by participants. Log is not required for this function.
Take on and off time log, reported by participants. Log is not required for this function.
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.
MVPA() takes longer running time than other functions as its nature of more complex calculation.
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
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