I have got a Garmin edge 520 for cycling.
However, I go swimming too (and other exercises) which I input manually.
I use a Poolmate 2 for swimming, which has the efficiency, SWOLF, too.
I put the distance, calories, laps, etc to the Garmin app manually, however, it doesn't let me input the SWOLF.
Can't see the reason why, as it let's me input everything else.
Any idea?