Biopac has a brief description of movement noise in the signal: Click here
Start by clicking Analysis → Find cycle
...
To remove single markers, hover over any marker → right-click → clear event.
To remove several markers at once, you can select the removal tool below. It removes the marker closest to where you click if you click once. Alternatively, you can use it like the selection tool and it will remove all markers within the selection.
To remove all events, hover over any marker → right-click → edit event → clear → select what you want remove (e.g. expire start, inspire start or flag). E.g. check the box for “type” and select “respiration → expiration” → ok. This will remove all expiration markers in the entire file. CAUTION: this action cannot be undone! You can check the box for channel and select CH2 Respiration to ensure you are only removing expiration markers in your respiration channel. For example, you may also use the same types of markers for CO2 analysis in channel 16.
...