adding trimp or rscore, time constants, test duration to form

rowers/templates/fitnessfit.html

@@ -72,11 +72,22 @@
 </script>
 
 {% if rower.user %}
-<h1>Power Progress for {{ rower.user.first_name }} </h1>
+<h1>Fitness Progress for {{ rower.user.first_name }} </h1>
 {% else %}
-<h1>Power Progress for {{ user.first_name }} </h1>
+<h1>Fitness Progress for {{ user.first_name }} </h1>
 {% endif %}
 
+<p>
+  This is an experimental page. Using the form below you can set
+  a date range to compare a prediction of your form (from TRIMP or rScore values
+  representing your workload). The Fitness Time Constant is the
+  time constant describing your fitness decline when you stop training. The
+  Fatigue Time Constant (shorter than fitness time constant) is the time
+  constant describing fatigue decline after a session. You have to select
+  a test duration that represents your fitness goal and is a duration for which
+  you regularly do maximal or submaximal efforts during your regular rowing workouts.
+</p>
+
 
 <ul class="main-content">
   <li class="grid_2">