Energetic cost of weight shifting and asymmetric weight-bearing during standing in humans

This dataset contains participant averages, statistical analyses, and code supporting: Leeuwis et al., 2026 “Energetic cost of weight shifting and asymmetric weight-bearing during standing in humans”, [publication doi].

Twenty healthy adults completed three 3-minute standing conditions:
- Baseline (B): static symmetric standing
- Shifting (S): symmetric standing with periodic lateral weight shifts
- Asymmetric (A): asymmetric standing with periodic switching of the supporting leg.

Energy expenditure was measured with indirect calorimetry; weight-bearing asymmetry, lean angle, center-of-pressure distance, acromion-marker velocity, and bilateral soleus and medial gastrocnemius EMG were derived from synchronized motion capture, force plate, and surface electromyography. Please find the publication for a detailed description of the methods.

The repository contains:
- (i) per-participant, per-condition average tables (.csv) of all reported metrics;
- (ii) synchronized time-series data (Measurements.mat) comprising labelled motion-capture marker kinematics, ground reaction forces and center of pressure, raw bilateral soleus/medial gastrocnemius EMG, and breath-by-breath metabolic-analyzer data; and
- (iii) MATLAB scripts for data processing, metric computation, and figure generation, together with the JASP statistics files.

The included metrics are:
- Pkg: Energy expenditure (mass-normalized metabolic power) (W/kg)
- asymmetry_abs_mean: Mean absolute weight-bearing asymmetry, Eq. 1 (dimensionless)
- theta: Whole-body lean angle, from AP CoP (deg)
- CoP_distance_x / CoP_distance_y: Mean CoP distance during segment between transitions, AP / ML (mm)
- CoP_distance: Mean CoP distance in both directions (mm)
- dACR_x_mean / dACR_y_mean: Mean acromion (ACR) marker velocity, AP / ML (mm/s)
- EMG_SOL / EMG_GAS: Normalized soleus / medial gastrocnemius EMG (dimensionless)
- knee_angle: Sagittal-plane knee angle (deg)
- CoP_vel / CoP_x_vel / CoP_y_vel: Mean CoP speed, resultant / AP / ML (mm/s)

Data were collected under Erasmus MC ethics approval MEC-2023-0205 and are released under CC BY 4.0.

1. https://publications.europa.eu/resource/authority/data-theme/HEAL

1. http://id.loc.gov/vocabulary/iso639-1/en

1. http://data.europa.eu/eli/reg/2016/679/oj

1. 2.0