Other Legacy Product FAQs

ENERGY PRO - Error R37-0 displayed

If you have a Mio Energy Pro watch that spontaneously resets back to 13:00, or shows the message R37 or R37-0 on screen, this is an indicator that the battery in the watch is running low and it is time to replace it.

The batteries used in the Energy Pro watch and chest strap are both Lithium-type CR2032. We recommend battery replacement be done by a reputable local watch repair service to ensure that the water-resistant seals are not compromised during the process.

Important: Improper battery replacement may cause damage to your watch and may void the warranty.

QUEST - Problems measuring PACE

GPS watches do not calculate PACE like typical pedometer type watches. It is not a calculation of distance / time.

GPS watches determine pace by measuring time from point-to-point (where it takes a spot measurement of location) as you run. This can throw off the concept of PACE significantly.

Here’s an older Runners World article that may help explain some of the features of using GPS watches including why distance and PACE why not be exactly what you expect them to be:


Note: effective May 2012 Mio has discontinued our sales of the Mio Quest product. We will continue to support the product to the best of our ability and the information on this site will remain available to users for the foreseeable future.


A waypoint, also referred to as a landmark,  is a specific location
defined by a set of GPS coordinates. The Quest will
allow you to save a large number of waypoints, any of which you can
rename to something that you will recognize, rather than using the
default name. It's a good idea to delete waypoints that you no longer
need or save them elsewhere in order to free up space on your GPS and
avoid confusion when using the device.

A Waypoint can be used to mark a certain location, and also use it in
the ‘Go To’ function.

The Quest has a dedicated Go To function. "Go To" means just what it
sounds like, you want to go to a waypoint of your choice from your
current location.  This will allow you, for example, to mark the location
of your vehicle or campsite before you start out for a hike and then
find your way back to it later by following the directions provided by
your GPS. When you press the Go To button or select that function, you
then need to select the proper waypoint from your list. This is where
renaming waypoints can come in handy.  Once you've selected the desired
waypoint, you can then use various navigation screens like the compass
screen to aid your travel back to that point. 

What is Stride and how do I calculate it?

What is Stride?

Stride is the length of your step, from heel to heel.   It is basically the distance you travel with each step you take.  It varies from person to person but can also vary for the same person when walking or running at different speeds.

How is Stride used?

Some Mio watches and pedometers will ask you for your Stride length as part of their Setup functions.  Others will assume a default length for stride.  What the watches and pedometers use the stride length for will vary from device to device but generally, when it is asked for by the device it is used to increase the accuracy of the measurements.

The Stride length is used by Mio devices to get a more accurate estimate of the distance you cover and the speed you are traveling.  This in turn is used in the calculation of calories burnt during your activities.

How do I calculate my stride length?

Calculating your own stride is pretty simple.  Take ten steps, measure the distance you covered and divide by 10.  The result is your average stride length.

The most accurate way to do this:

  1. Mark the starting point of the heel of your foot - left or right is your choice.
  2. Take 10 steps in a straight line.
  3. Mark the ending point of the of your foot, the same foot as at the start.
  4. Measure the distance between the two marks.
  5. Divide the results by 10 to get the average Stride length.

If you have setup your device to use Miles you should measure in inches.   If you used Kilometers you should measure in centimeters.  Check your manual for exact details of how to enter the Stride length into the device.

Why is the watch/pedometer asking for Age, Gender, Weight and Height?

Mio Watches and Pedometers always try to get you the most accurate measurements possible when you use them.

Mio Watches and Pedometers may ask you to provide details such as Age, Gender, Height or Weight when you first turn on the device or when going through the Setup on the device.

They ask these questions for a very specific purpose: to increase the accuracy of the formulas used in the devices that are used to calculate information such as Calories burnt, Distance or Speed.

For example, Age and Gender are both used to estimate your Maximum Heart Rate (MHR) which is then used to calculate calories used during activities.  Weight is also used in some of the calorie calculations.  Height and or Gender may be used to estimate your stride length, or the size of your step, for determining speed or distance.