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Rate of Perceived Exertion
Heart rate is important but listening to your body also has a lot of advantages. There are more
variables involved in how hard you should workout than just heart rate. Your stress level,
physical health, emotional health, temperature, humidity, the time of day, the last time you ate
and what you ate, all contribute to the intensity at which you should workout. If you listen to your
body, it will tell you all of these things.
The rate of perceived exertion (RPE), also know as the Borg scale, was developed by Swedish
physiologist G.A.V. Borg. This scale rates exercise intensity from 6 to 20 depending upon how
you feel or the perception of your effort.
The scale is as follows:
Rating Perception of Effort
6 Minimal
7 Very,very light
8 Very,very light +
9 Very light
10 Very light +
11 Fairly light
12 Comfortable
13 Somewhat hard
14 Somewhat hard +
15 Hard
16 Hard +
17 Very hard
18 Very hard +
19 Very,very hard
20 Maximal
You can get an approximate heart rate level for each rating by simply adding a zero to each
rating. For example a rating of 12 will result in an approximate heart rate of 120 beats per
minute. Your RPE will vary depending up the factors discussed earlier. That is the major benefit
of this type of training. If your body is strong and rested, you will feel strong and your pace will
feel easier. When your body is in this condition, you are able to train harder and the RPE will
support this. If you are feeling tired and sluggish, it is because your body needs a break. In this
condition, your pace will feel harder. Again, this will show up in your RPE and you will train at the
proper level for that day.
Using a Heart Rate Transmitter
How to wear your wireless chest strap transmitter:
1. Attach the transmitter to the elastic strap using the locking parts.
2. Adjust the strap as tightly as possible as long as the strap is not too tight to remain
comfortable.
3. Position the transmitter with the Spirit logo centered in the middle of your body facing away
from your chest (some people must position the transmitter slightly left of center). Attach the
final end of the elastic strap by inserting the round end and, using the locking parts, secure the
transmitter and strap around your chest.
4. Position the transmitter immediately below the pectoral muscles.
5. Sweat is the best conductor to measure very minute heart beat electrical signals. However,
plain water can also be used to pre-wet the electrodes (2 black square areas on the reverse