Data underlying: Movement fluency metrics during multi-phase sit-to-walk and reach-to-grasp: Test-retest reliability and agreement between laboratory-based and portable 3D motion analysis systems

This repository contains anonymised data supporting the article “Movement fluency metrics during multi-phase sit-to-walk and reach-to-grasp: test–retest reliability and agreement between laboratory-based and portable 3D motion analysis systems.” The dataset quantifies movement fluency during two functional tasks and evaluates repeatability across sessions and agreement between laboratory and portable 3D motion analysis systems.

Contents
The dataset includes the information required to reproduce the fluency metrics reported in the article. Both Vicon data and Biokido data folders contain data within participant folders. The protocol was for participants to have these metric collected on two separate occasions, data is contained in subfolders S1 for Session 1 and S2 for session 2.

Vicon data
MATLAB structures sampled at 100 Hz. Only markers and outputs needed for analyses are included.

Reach-to-grasp (RTG)

Wrist trajectories (LWRA, LWRB, RWRA, RWRB) for smoothness (SPARC).

Trigger channel and trial onset.

Participant ID and trial name.

Trial naming standardised to task conditions:

RTG-MD = dominant hand to midline

RTG-MND = non-dominant hand to midline

RTG-CD = dominant hand to contralateral

RTG-CND = non-dominant hand to contralateral

Repetitions appended (e.g. RTG-MD1). Original trial code preserved as OriginalTrial.

Sit-to-walk (STW)

TRX (thorax, 3D) for smoothness (SPARC).

Gait events: LHS, LTO, RHS, RTO.

Participant ID and trial name.

Common

Sampling: 100 Hz.

Global coordinate system info.

Biokido data
Trimmed CSV files sampled at 90 Hz. Each file is a single RTG or STW trial containing required 3D trajectories.

RTG CSVs

tX,tY,tZ: thorax (mm).

wX,wY,wZ: wrist (mm).

frame_number: sample index.

time_stamp: acquisition time.

STW CSVs

X,Y,Z: thorax (mm).

XF,YF,ZF: filtered thorax.

Y1,Z1,Y2,Z2,Y3,Z3: derived components.

Y1F,Z1F,Y3F,Z3F: filtered counterparts.

frame_number, time_stamp.

“F” = filtered version.

Organisation
CSV files are stored under Biokido files/RTG and Biokido files/STW with participant subfolders (e.g. PH001). Trials named by task condition (RTG-MD, RTG-MND, RTG-CD, RTG-CND, STW1, STW2…).

Intended use
Enables reproduction of reliability and agreement analyses and supports further work on movement fluency, phase-specific behaviour, and system comparisons.

Ethics
All participants gave informed consent. Data are fully anonymised.

Publication
Please cite both this dataset and the article when using these data.