![Smile :)](./images/smilies/icon_smile.gif)
I was about to jump to the defence of the BIkeErg, but I see others have already done so. The challenges count half the logged metres, but for the affiliation leaderboard there isn't an adjustment. So in the Forum Flyers leaderboard there is a bias towards the BikeErg near the top, but you can also filter by different types of equipment if you want to see different slices of the leaderboard.
I will admit that I find it easier overall to accumulate metres on the BikeErg. It hurts the legs and butt in a similar way, but there is less strain on the back, shoulders and fingers, so I find that I can do multiple days in a row more easily. For last year's Holiday Challenge I was well behind the average after a slow start, and did a 100km on my first day of leave. It definitely wasn't as tough as doing a marathon on the rower even though the 100km took me well over 4 hours to complete with only a couple of stretching breaks along the way.
I've been doing the Tour of Watopia and a Zwift climbing mission, but those are almost done and I'm definitely going to mix some rowing back into the quarantine training. I can imagine that overtraining is a real risk, but I'm having to work remotely so still struggle to fit in training during the working week. Admittedly it should be easier to sneak in a morning session before I sit at the desk, seeing there is no school run to do, so must look into that more.
Dave