accelerometer: Visual and accelerometer data on workouts

In speegled/fosdata: Data for use with the book "Probability, Statistics, and Data: A Fresh Approach Using R", by Darrin Speegle and Bryan Clair

Visual and accelerometer data on workouts

Description

One measure that is of interest when working out with weights is the length of time that muscles are engaged in the exercise. The gold standard for measuring this is via a video of the exercise that is evaluated by a human looking at it frame by frame. This data contains such information for participants doing several different common weight training exercises. The same lengths are computed via a novel way using a smartphone accelerometer, which was attached to the weights.

Usage

accelerometer

Format

A tibble with 12245 observations of 25 variables.

participant

ID of participant, from 1-22.

machine

Name of the machine that the participant was using. Levels are "LEG PRESS" "LEG EXTENSION" "LEG CURL" "ABDUCTOR" ADDUCTOR" "LOWER BACK" "TOTAL ABDOMINAL" "VERTICAL TRACTION" and "CHEST PRESS"

set

Participants did two sets of each machine. This is numeric 1-2.

contraction_mode

Participants repeated each exercise 10 times in a set. This variable describes whether the observation is related to concentric contraction, eccocentric contraction, contraction for a single rep, and total time-under-tension

time_video_rater_*_ms

Length of time in ms that the raters estimated the contraction to last from video.

time_smartphone_*_ms

Estimated time (ms) contraction lasted as computed by one of two smartphones.

video_rater_mean_ms

Mean of two video timings.

smartphones_mean_ms

Mean of two smartphone timings.

relative_difference

abs(smartphones_mean - video_rater_mean)/video_rater_mean

difference_video_smartphone_ms

Difference between video an smartphone estimate.

mean_video_smartphone_ms

Mean of video and smartphone means.

contraction_mode_levels

One of Con, Ecc, Rep or TuT. Redundant given contraction_mode

difference_*_ms

Difference of video raters/smartphones in ms

**_outlier

Hampel outliers

participant_*

Demographic data of participants

Details

From the authors: "Single repetition, contraction-phase specific and total time-under-tension (TUT) are crucial mechano-biological descriptors associated with distinct morphological, molecular and metabolic muscular adaptations in response to exercise, rehabilitation and/or fighting sarcopenia. However, to date, no simple, reliable and valid method has been developed to measure these descriptors."

Source

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0235156

https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/R3ZKYH

speegled/fosdata documentation built on Feb. 8, 2025, 8:17 a.m.