OptionalavgOptionalavgOptionalavgOptionalavgWall-clock span (toSec − fromSec).
OptionalelevationElapsed seconds from activity start to the section's start / end.
OptionalmaxOptionalmaxOptionalmaxTime actually moving — equals duration for computed splits.
OptionalnormalizedCumulative-distance window into the activity (metres) — the map-highlight anchor, mirroring [fromSec, toSec] on the distance axis.
The normalized metric bundle a Section is a quantity-typed view over. Produced three ways — a computed split, a recorded lap, or an arbitrary range — all reduced to the same shape (native SI). Optional fields are absent when the underlying channel wasn't recorded.