fix

rowers/views/workoutviews.py

@@ -3088,6 +3088,8 @@ def instroke_chart_interactive(request, id=0, analysis=0, userid=0):
         factor=factor,
         )
 
+    data = data.fillna(method='ffill').fillna(method='bfill')
+
 
     if metric == 'boat accelerator curve' and data.median().max() < 0.5:
         data = 9.81*data