diff --git a/README.md b/README.md
index 47a81fa..cc5dc0c 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,10 @@
 ![Aligned Average RR Interval](Plots/Aggregate/RR_average_aligned.png)
 ![Aligned Average RMSSD](Plots/Aggregate/RMSSD_average_aligned.png)
 
+# Outlier Detection
+
+Scripts filter any RR values outside of the range [300, 2000] ms. Values outside of this range are replaced by interpolated values. For current samples no outliers were detected.
+
 ## How calculations are done
 
 - HR and RR loading