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From Fellrnr.com, Running tips
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This will calculate your VDOT, training paces and race time. It can adjust for temperature, and weight variation.
== Introduction ==The idea of [[VDOT]] is at the heart of [[Jack Daniels Running Formula]]. To find out your [[VDOT]] and associated paces, you will need the results of a recent race. Go to [http://www.runbayou.com/jackd.htm http://www.runbayou.com/jackd.htm] and enter Enter your race time and race distancebelow, then and hit "'Calculate VDOT"'. This will give you a series of equivalent times for other distances. It will also give you a list of paces for various workout types and distances. So, if you did a 5K in 21:00, you would get aerobic intervals (I Pace) of 400m in 1:38, 800m in 3:35, 1200m in 4:54. Remember that this gives you the paces to use in a training program, but it is not itself a plan, just the paces. There is an explaination of the paces at [[VDOT Based Intensities]]. The quantities mentioned in the calculator, such as 'Qty: lesser of 90 min or 16 miles' is taken from the Jack Daniels book and reflect JD's overall maximums. This does not mean that you should necessarily be using all of the paces; it will depend on what training you are doing.
You may have several race results that indicate different VDOT values. If the races are all reasonably recent and reflect your current fitness level, use the best VDOT number. If you've been injured or had a break from training since your last race, you should not use an old race result.
<html>
<form style="font-family: Helvetica,Arial,sans-serif;" method="get" action="/fellrnr/vdot_wrapper.php" name="VDOT">
<table style="text-align: left;" border="1" cellpadding="1" cellspacing="1">
<tbody>
<tr>
<td>Distance</td>
<td>
<input name="Distance" value="0" type="radio">1500 Meters<br> <input name="Distance" value="1" type="radio">Mile<br>
<input name="Distance" value="2" type="radio">3K<br>
<input name="Distance" value="3" type="radio">2 Miles<br>
<input name="Distance" value="4" type="radio">5K<br>
<input name="Distance" value="5" type="radio">8K<br>
<input name="Distance" value="6" type="radio">5 Mile<br>
<input name="Distance" value="7" type="radio">10K<br>
<input name="Distance" value="8" type="radio">15K<br>
<input name="Distance" value="9" type="radio">10 Mile<br>
<input name="Distance" value="10" type="radio">20K<br>
<input name="Distance" value="11" type="radio">Half Marathon<br>
<input name="Distance" value="12" type="radio">25K<br>
<input name="Distance" value="13" type="radio">30K<br>
<input name="Distance" value="14" checked="checked" type="radio">Marathon<br>
</td>
</tr>
<tr>
<td>Time</td>
<td>
<table style="text-align: left;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td><input maxlength="3" size="3" name="Hours" value="0"><br>
</td>
<td>Hours</td>
<td><input maxlength="3" size="3" name="Minutes" value="0"></td>
<td>Minutes</td>
<td><input maxlength="3" size="3" name="Seconds" value="0"></td>
<td>Seconds</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td>Heat Index (optional)</td>
<td>
<table style="text-align: left;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td><input maxlength="3" size="3" name="Temperature" value=""></td>
<td>
<select name="TempUnits"><option selected="selected">Fahrenheit</option><option>Centigrade</option></select>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td>Body Weight (optional)</td>
<td>
<table style="text-align: left;" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td><input maxlength="3" size="3" name="Weight" value=""></td>
<td>
<select name="WeightUnits"><option>Kg</option><option selected="selected">Pounds</option></select>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<button name="Calculate">Calculate</button><br>
</form>
</html>
Note: you must enter the time of a race you have completed, not your target time for a race. Please repeat out loud "I will enter the time of a race I've completed". More seriously, this is a very common mistake that you need to avoid. Train based on your current fitness, not the fitness you hope to achieve. If you put in a target pace rather than an actual pace you are missing the point of the system. Jack Daniels paces are intended to provide a pace that produces a specific training stress. If you don't use a previous race pace, you will be using the wrong pace.
