Generally it is up to the type of experiment being performed and the application. Most users typically use a window between 20-500 ms with the “RMS” smoothing operation.

For help with window selection, we recommend the following resources:

• The ABC of EMG Booklet🔗 covers general theory and insight as to the optimal window to use. The section on signal processing begins on page 27.
• The article EMG Signal Processing: Key Techniques and Practical Recommendations🔗 provides practical insight on smoothing window selection based on specific activities.

We also recommend performing a literature review of studies utilizing EMG for similar activities to cross-reference window selection.