diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index d5c46c6b..c98edd6c 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -2332,8 +2332,16 @@ def workout_normv(w,pp=4.0):
     v4mean = wavg(df,'v4','deltat')
     normv = v4mean**(1./pp)
 
-    if np.isnan(normv):
-        return 500./120.
-
-    return normv
+    df['w4'] = df['driveenergy']**(pp)
+    w4mean = wavg(df,'w4','deltat')
+    normw = w4mean**(1./pp)
+    
+
+    if np.isnan(normv):
+        normv =  500./120.
+
+    if np.isnan(normw):
+        normw = 0
+
+    return normv,normw
     
diff --git a/rowers/forms.py b/rowers/forms.py
index ae4fcc53..1ad57343 100644
--- a/rowers/forms.py
+++ b/rowers/forms.py
@@ -485,11 +485,13 @@ class MyTimeField(forms.TimeField):
 class PowerIntervalUpdateForm(forms.Form):
     selectorchoices = (
         ('power','Power'),
-        ('pace','Pace')
+        ('pace','Pace'),
+        ('work','Work per Stroke'),
         )
     
     pace = forms.DurationField(required=False,label='Pace (/500m)')
     power = forms.IntegerField(required=False,label='Power (W)')
+    work = forms.IntegerField(required=False,label='Work per Stroke (J)')
     selector = forms.ChoiceField(choices=selectorchoices,
                                  required=True,
                                  initial='power',
diff --git a/rowers/views.py b/rowers/views.py
index 45406548..63764da4 100644
--- a/rowers/views.py
+++ b/rowers/views.py
@@ -11293,7 +11293,7 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
 
     tss,normp = dataprep.workout_rscore(row)
 
-    normv = dataprep.workout_normv(row,pp=8.0)
+    normv,normw = dataprep.workout_normv(row,pp=8.0)
 
     try:
         avpace = datetime.timedelta(seconds=int(500./normv))
@@ -11304,6 +11304,7 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
         'power': int(normp),
         'pace': avpace,
         'selector': 'power',
+        'work': int(normw)
         }
 
     powerorpace = 'power'
@@ -11337,15 +11338,21 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
         powerorpace = request.POST['powerorpace']
         value_pace = request.POST['value_pace']
         value_power = request.POST['value_power']
+        value_work = request.POST['value_work']
         if powerorpace == 'power':
             power = int(value_power)
             pace_secs = 120.0
-        else:
+            work = 400.
+        elif powerorpace == 'pace':
             power = 0
             try:
                 pace_secs = float(value_pace)
             except ValueError:
                 pace_secs = float(value_pace.replace(',','.'))
+        elif powerorpace == 'work':
+            power = 0
+            work = int(value_work)
+            pace_secs = 120.0
 
         if powerorpace == 'power' and power is not None:
             try:
@@ -11362,6 +11369,13 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
                     debug=False,smoothwindow=15.)
             except:
                 messages.error(request,'Error updating pace')
+        elif powerorpace == 'work':
+            try:
+                rowdata.updateinterval_metric(
+                    ' WorkPerStroke (joules)',work,mode='larger',
+                    debug=False,smoothwindow=15.)
+            except:
+                messages.error(request,'Error updating Work per Stroke')
 
         intervalstats = rowdata.allstats()
         itime,idist,itype = rowdata.intervalstats_values()
@@ -11386,7 +11400,8 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
         formvalues = {
             'powerorpace': powerorpace,
             'value_power': power,
-            'value_pace': pace_secs
+            'value_pace': pace_secs,
+            'value_work':work,
             }
 
             
@@ -11429,6 +11444,7 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
             powerorpace = cd['selector']
             power = cd['power']
             pace = cd['pace']
+            work = cd['work']
             try:
                 pace_secs = pace.seconds+pace.microseconds/1.0e6
             except AttributeError:
@@ -11447,6 +11463,14 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
                                                   debug=False,smoothwindow=15)
                 except:
                     messages.error(request,'Error updating pace')
+            elif powerorpace == 'work':
+                try:
+                    rowdata.updateinterval_metric(
+                        'driveenergy',work,mode='larger',
+                        debug=False,smoothwindow=15.)
+                except:
+                    messages.error(request,'Error updating Work per Stroke')
+                    
 
             intervalstats = rowdata.allstats()
             itime,idist,itype = rowdata.intervalstats_values()
@@ -11455,7 +11479,8 @@ def workout_summary_edit_view(request,id,message="",successmessage=""
             formvalues = {
                 'powerorpace': powerorpace,
                 'value_power': power,
-                'value_pace': pace_secs
+                'value_pace': pace_secs,
+                'value_work': work,
                 }
             powerupdateform = PowerIntervalUpdateForm(initial=cd)
 	    form = SummaryStringForm()