I also much prefer the upper body stuff nowadays and use lower weights on the lower body. Last time my bum and thighs bulked up a bit too much and I couldn’t fit in my trousers, which would’ve involved an entire wardrobe refresh. Also I’m quite a small build so too much bulk just makes me look stocky.
I now stick to 6kg for most lower body exercises and I find it’s perfect for staying toned and firm without the build up. I’ve started to go a bit heavier for some of the upper body stuff as I did enjoy my strength at the end of Iron, plus I’ve been doing work around the house and it’s really been helping with the drilling and chainsawing and my arms don’t get so tired.
I’m on Heat day 34, I’ve been doing 3-4 a week with gaps in between but I’ve not skipped one, I even did the HIIT, so I’m quite chuffed with myself. Last time I skipped most of them so this has been a novelty for me.