Fix error thrown when viewing profile of a person with a single workout with a single topset

utils.py

@@ -111,6 +111,7 @@ def get_stats_from_topsets(topsets):
                               date.today() - last_workout_date).days})
 
             training_duration = last_workout_date - first_workout_date
+            if training_duration > timedelta(days=0):
                 average_workouts_per_week = round(
                     workout_count / (training_duration.days / 7), 2)
                 stats.append({"Text": "Average Workouts Per Week",