Problem reading a GPX file

[routeconverter]

Edit: Really is not completely solved RC read the speed but not the good value. For instance for the attached file, in the first point 
            <time>2018-08-23T10:59:05Z</time> .... <gpxtpx:speed>25.45</gpxtpx:speed>
       RC shows 40.1399350,-6.0327120,Position 1, 92.0 km/h.

Again, that is valid. Garmin states in its documentation:

<xsd:simpleType name="MetersPerSecond_t">
<xsd:annotation><xsd:documentation>
This type contains a speed measured in meters per second.
</xsd:documentation></xsd:annotation>
<xsd:restriction base="xsd:double"/>
</xsd:simpleType>

So if you're using that extension you have to convert to m/s.

BTW you could help me about how it would be included in the format gpx data of the KCal consumed info?
Neither the author nor I have found the gpx or Garmin tokens to do that.

What data do you mean? You might want to check the XML Schemata if've collected for the various GPX extensions: https://github.com/cpesch/RouteConverter...c/main/doc