diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index 52e56fd6..97b2bded 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -1551,7 +1551,7 @@ def fitnessfit_chart(workouts,user,workoutmode='water',startdate=None,
             pass
 
     if len(data) == 0:
-        return pd.Series(),pd.Series(),0,pd.Series()
+        return '','Insufficient data'
     if len(data)>1:
         df = pd.concat(data,axis=0)