diff --git a/rowers/middleware.py b/rowers/middleware.py
index db511b02..70837ada 100644
--- a/rowers/middleware.py
+++ b/rowers/middleware.py
@@ -62,9 +62,9 @@ def do_update(user,mode='rower',days=42):
 class PowerTimeFitnessMetricMiddleWare(object):
     def process_request(self, request):
         # Code to be executed before the view is called
-
-        result = do_update(request.user,mode='rower')
-        result = do_update(request.user,mode='water')
+        if request.user.is_authenticated():
+            result = do_update(request.user,mode='rower')
+            result = do_update(request.user,mode='water')