stepmetrics1.0.3 package

Calculate Step and Cadence Metrics from Wearable Data

define_day_indices

Generate sequential day indices from ISO 8601 timestamps

get_cadence_bands

Calculate minutes and steps spent in cadence bands

get_cadence_peaks

Calculate cadence peak metrics

isGGIRoutput

Check if a directory is a valid GGIR output folder for stepmetrics

readFile

Read and standardize minute-level step data for one participant

step.metrics

Calculate and export daily and person-level step and cadence metrics

Download source packageRead PDF manual

Provides functions to calculate step- and cadence-based metrics from timestamped accelerometer and wearable device data. Supports CSV and AGD files from 'ActiGraph' devices, CSV files from 'Fitbit' devices, and step counts derived with R package 'GGIR' <https://github.com/wadpac/GGIR>, with automatic handling of epoch lengths from 1 to 60 seconds. Metrics include total steps, cadence peaks, minutes and steps in predefined cadence bands, and time and steps in moderate-to-vigorous physical activity (MVPA). Methods and thresholds are informed by the literature, e.g., Tudor-Locke and Rowe (2012) <doi:10.2165/11599170-000000000-00000>, Barreira et al. (2012) <doi:10.1249/MSS.0b013e318254f2a3>, and Tudor-Locke et al. (2018) <doi:10.1136/bjsports-2017-097628>. The package record is also available on Zenodo (2023) <doi:10.5281/zenodo.7858094>.

  • Maintainer: Jairo H Migueles
  • License: AGPL (>= 3)
  • Last published: 2025-10-01

Useful links