diff --git a/rowers/dataprep.py b/rowers/dataprep.py
index 76a6fa59..df69be91 100644
--- a/rowers/dataprep.py
+++ b/rowers/dataprep.py
@@ -2208,7 +2208,7 @@ def dataprep(rowdatadf, id=0, bands=True, barchart=True, otwpower=True,
         else:
             drivenergy = drivelength * averageforce
 
-    powerhr = power/hr
+    powerhr = 60.*power/hr
     powerhr = powerhr.fillna(value=0)
             
     if driveenergy.mean() == 0 and driveenergy.std() == 0:
diff --git a/rowers/metrics.py b/rowers/metrics.py
index a55167c7..81f28632 100644
--- a/rowers/metrics.py
+++ b/rowers/metrics.py
@@ -91,7 +91,7 @@ rowingmetrics = (
         'null':True,
         'verbose_name': 'Power Heart Rate Efficiency (J/beat)',
         'ax_min':0,
-        'ax_max':5,
+        'ax_max':300,
         'mode':'both',
         'type':'pro'}),