Event_Labels are defined by the c3d format. Event_Labels exist only at Motion Capture frames (e.g. at Point Rate). For model based kinematic and kinetic calculations this is fine, because these signals only exist at Motion Capture frames.

For measures of timing that involve signals that are at ANALOG rate (e.g. Force Platform data) the motion capture rate isn't sufficient.

In Version 5 a series of metric commands were introduced to identify the time of a threshold crossing or maximum at the analog rate.

Metric_Time_Of_Threshold_From_Event /RESULT_EVENT_NAME= ! /SIGNAL_TYPES= ! /SIGNAL_NAMES= ! /SIGNAL_FOLDER=ORIGINAL ! /SIGNAL_COMPONENTS= ! /FRAME_OFFSET=0 ! /TIME_OFFSET= ! /EVENT_SEQUENCE= ! /EXCLUDE_EVENTS= ! /EVENT_SEQUENCE_INSTANCE=0 ! /EVENT_SUBSEQUENCE= ! /SUBSEQUENCE_EXCLUDE_EVENTS= ! /EVENT_SUBSEQUENCE_INSTANCE=0 ! /EVENT_INSTANCE=0 ! /SELECT_X= ! /SELECT_Y= ! /SELECT_Z= ! /SELECT_RESIDUAL= ! /START_AT_EVENT= ! /END_AT_EVENT= ! /THRESHOLD= ! /ON_ASCENT=TRUE ! /ON_DESCENT= ! /FRAME_WINDOW=8 ! /ENSURE_FRAMES_BEFORE= ! /ENSURE_FRAMES_AFTER= ;