adding OTW power slack

rowers/templates/rower_form.html

@@ -7,6 +7,7 @@
   <div class="grid_6 alpha">
     <p>
       <h2>Heart Rate Zones</h2>
+      <p>Set your heart rate zones with this form.</p>
       {% if form.errors %}
     <p style="color: red;">
       Please correct the error{{ form.errors|pluralize }} below.
@@ -27,6 +28,8 @@
   <div class="grid_6 omega">
     <p>
       <h2>Power Zones</h2>
+    <p>The power zones are defined relative to power as measured by the
+      indoor rower.</p>
       <form enctype="multipart/form-data" action="" method="post">
         {% if powerzonesform.errors %}
         <p style="color: red;">
@@ -127,10 +130,15 @@
   </div>
   <div class="grid_6 omega">
     <p>
-      <h2>Functional Threshold Power</h2>
+      <h2>Functional Threshold Power and OTW Slack</h2>
     <p>Use this form to quickly change your zones based on the power of a
       recent
-      full out 60 minutes effort. It will update all zones defined above.</p>
+      full out 60 minutes effort on the ergometer.
+      It will update all zones defined above.</p>
+    <p>The OTW Power Slack is the percentage drop of your On-the-water
+      rowing power
+      vs the erg power. Typical values are around 15%. This will lower
+      the power zones for your OTW workouts.</p> 
     <form enctype="multipart/form-data" action="" method="post">
       <table>
 	{{ powerform.as_table }}