Posted by FLATOUT JIM
Start of the training program
If you read my previous post reviewing Joe Friels book “Total Heart Rate Training” You remember I explained that the book outlined a 12 step program for mapping out the training year. Step 1 in this process is to find your Lactate Threshold (LT). Step 2 is to determine the training zones. In my case, because I am preparing for triathlon, I have to find three different numbers, one for each sport, swimming, cycling, and running. Joe Friel uses lactate threshold as the key number to figuring out your training zones, and provides charts to easily do that.
The best way to determine (LT) is with a field test. There are several different protocols for conducting field tests. One is the 30 minute test where you conduct a time trial at race effort. The time trial could or even be a race. The graded test, is similar to the type typically conducted in a lab, but can be done using a heart rate monitor, and some kind egometer like a bike trainer, or treadmill. The graded test is best done with a partner who can monitor your changes in heart rate, and record results, although I managed to do a cycling test on my own.
Swim
Trying to find your lactate threshold in the pool or pond is challenging. The main problem is that a heart rate monitor doesn’t work in the water, so it’s difficult to get an accurate reading after a long set. You could wear your chest strap, or leave it on the pool deck and put it on as soon as you finish, and get out of the pool immediately after the set, or you could take a pulse reading for a 10 second count. However, these methods have huge errors built in because your heart rate starts to drop immediately after you stop the effort. For a 10 second count, a miscount of as little as 1 or 2 beats means a total hear rate error 6 to 12.
For my swim test, I did a similar test to one previously done at one of our masters sessions. After a thorough warm-up of about 15 minutes, I did a 10 minute set. The key was to set a pace that was hard, but could be held for the entire 10 minutes. I also counted my laps during this set to test where my fitness was, and how much it improved in upcoming tests. As soon as I stopped, I did a 10 second pulse check. My pulse was 25 which translated to a rate of 152 bpm. Since this was an extended set with a hard effort, it should have represented a rate close to the lactate threshold. The resulting zones from the published tables in the book are
1. less that 118
2. 118 to 133
3. 134 to 142
4. 143 to 151
5a. 152 to 155
5b. 156 to 160
5c. 161 plus
Bike
For the bike, I attempted a graded test on the trainer. The protocol was to do a thorough warm up, and then play with my tensions and gears to come up with a systematic series of intervals at increasing intensities with the final one being a very hard effort. Then do a series of graded efforts starting in the easiest gear, and ending with the hardest. I kept my cadence at 90 to 95, and used speed as the output. I did this with my laptop next to me on a table so I could input the data into a spreadsheet with little effort so I didn’t slow down.
I deviated slightly from Friels protocol in that I cycled in each gear until my heart rate stabilized. That was sometimes 2 to 3 minutes. The resulting data is below.
Speed km/h Heart Rate Perceived Exertions
18 117 2
19.5 118 2
21.5 124 2
23.5 128 3
26.5 132 4 breathing increases
32.5 146 4
36.5 152 5
40.5 156 6
46.5 165 7 lt
50 169 8
According to Joe Friel, your lactate threshold should lie in the last five data points, and if one of the five points has a RPE of 7, assume that to be your LT. For me that worked out to be a heart rate of 165 which from a couple of 20k time trials I did last year, sounded about right. So my zones for the bike are
1. less that 134
2. 134 to 147
3. 148 to 154
4. 155 to 164
5a. 165 to 168
5b. 169 to 174
5c. 175 plus
Run
I haven’t done a running field test yet. My plan is to do a test in the next couple of weeks, but for now, to ensure I have a set of targets for my current workouts, I estimated my LT. Friel states that if you can’t conduct tests in all three sports, you can make reasonable estimates based on one test. He states that the running LT heart rate can be assumed to be 7 beats higher than cycling which in turn can be assumed to be 7 beats higher than swimming. Using data from my graded cycling test, my estimated LT for running is 165 + 7 = 172. So again from the tables, my running zones are
1. Less that 146
2. 146 to 156
3. 157 to 164
4. 165 to 171
5a. 172 to 1175
5b. 176 to 182
5c. 183 plus
What I really want to do is visit the School of Kinematics at the local university, and have a proper test done. That way I could use the run data to see how far off my tests in the other sports are.
Next up after steps 1 and 2, determining lactate threshold, and training zones, is step 3 select annual plan.


