This feature allows the app to read tracks from a folder of your choice, in addition to the main tracks folder — whose location has recently changed. Such tracks are read-only: They can be viewed and shared, but cannot be edited, resumed nor deleted.
Pure mechanical work expended (disregarding thermal efficiency and BMR). For bikes this can be regarded as a measure of chain wear - a standard bicycle chain will last about 100 MJ, for motorcycles about 1 GJ.
Power loss or gain while ascending or descending. Negative means power gain (descending). When in kcal/h or kJ/h, it also takes efficiency into account.