The free weights in the gym are done in KGs, the machines are labelled with both, but they're based on lbs so it's simpler to go by the lbs. But you're right, maybe I should keep track of it all in kgs.For me it is much easier to think in kg anyway
If you always measure the same exercises in the same category, you can compare those weights from training to training. So you'll se gains anyhow.
I think an overview in one measurement is nicer, since you can also compare how much more weight you move with another musclegroup. I like to see that. But I mean it is totally up to you
By the way, did you hold the 17,5kg dumbell(?) with two hands?
And what is a resistance row machine?
Well I tend to keep track of the same machine in the same measurements, I don't switch up with them (I think? Unless I labelled them wrong). But I dislike lbs in the first instance, kg makes much more sense.
For the behind the head tricep thingie, I held it with both hands yeah.
I dunno what the real word for the resistance row machine is... the machine just says 'row machine'. But it's not a rowing machine... you sit down on it with a straight back, and there is a pad which is pressed against your chest/ stomach. There are two handles in front of you, and you hold them with your hands with your thumb pointing upwards, with your arms out straight. Then you pull back, so that your arms bend as far as they can, and you pull in your shoulderblades. Etc.