I'm trying to setup inline skating activity by copying the existing one, and I noticed that pace data doesn't add up to average pace. Also I noticed that if I do long slides(with low cadence or just rolling without leg movement), watches tend to decrease my current speed down to walking speed(for example, I'm rolling at ~18 km/h, watches say that I'm moving at 3 km/h).
Is that true that there's some combination of GPS-based and accelerometer-based speed that is shown as my running speed?
Should I rather copy other activity(biking, for example) than running for inline skating?