Fig. 2

Grand-averaged time-courses of changes in acceleration (peak-to-peak amplitude of the acceleration signal vector magnitude, top row), heart rate (HR, middle row), and pulse wave amplitude (PWA, bottom row) associated with segmental wrist (left column) and ankle (right column) movements during the diary-defined sleep period. Data are presented as mean ± SEM of percent change from baseline with N = 9 subjects. Time zero (T = 0) indicates movement onset. P-values are shown on a logarithmic scale.