mensional space), i.e. <em>SVM = sqrt(x^2 + y^2 + z^2)</em>. ENMO is the corrected SVM: the vector magnitude remaining after removing one Earth Standard Gravitational unit (1g = 9.81 m/s^2), with negative values rounded to 0, i.e. <em>ENMO = max(SVM - 1, 0)</em>. The metrics can, in principle, be calculated for each {x, y, z}-data point in the raw series. Typically, however, the metrics are calculated for time-windows (called <em>epochs</em>), in which case the mean can be used to characterize the overall a