diff --git a/rowers/sporttracksstuff.py b/rowers/sporttracksstuff.py
index 94b99ce2..795d6067 100644
--- a/rowers/sporttracksstuff.py
+++ b/rowers/sporttracksstuff.py
@@ -157,7 +157,10 @@ def createsporttracksworkoutdata(w):
     # adding diff, trying to see if this is valid
     #t = row.df.loc[:,'TimeStamp (sec)'].values-10*row.df.ix[0,'TimeStamp (sec)']
     t = row.df.loc[:,'TimeStamp (sec)'].values-row.df.loc[:,'TimeStamp (sec)'].iloc[0]
-    t[0] = t[1]
+    try:
+        t[0] = t[1]
+    except IndexError:
+        return 0
 
     d = row.df.loc[:,'cum_dist'].values
     d[0] = d[1]
diff --git a/rowers/utils.py b/rowers/utils.py
index 3d26097c..335617b2 100644
--- a/rowers/utils.py
+++ b/rowers/utils.py
@@ -388,7 +388,10 @@ def wavg(group, avg_name, weight_name):
     In rare instance, we may not have weights, so just return the mean. Customize this if your business case
     should return otherwise.
     """
-    d = group[avg_name]
+    try:
+        d = group[avg_name]
+    except KeyError:
+        return 0
     try:
         w = group[weight_name]
     except KeyError: