Signal

The Signal graph displays the resultant (all 3 axes combined) accelerations of the left foot in the top half of the graph (orange) and the right foot in the bottom half of the graph (green). This graph is useful for assessing general activity trends, like when turnarounds occurred and shapes of the movement patterns. Below is a typical Signal graph for a 2 minute walk:

Signal graph for a walk

The main gait features that are visible in the Signal graph are the stance phase (AKA ground contact), the swing phase, and toe off and foot strikes. Some individuals will present different toe off and foot strike shapes on each foot. Before drawing any conclusions from this, make sure to check that this is a persistent pattern throughout the whole activity, and not a one off.

Phases of gait in the Signal graph