For comparison purposes..
weight- 75 kg
age-25
build- medium
For my first pair of stilts, I had 110 kg (poweriZer) springs.
After a month or two, I could bottom them out when bouncing, but it took a lot of work to get that far, mind you. (Very exhausting..
) I would say it was a mistake to start out that high. (Note: Seller 'misrepresented' them as a lower weight, I didn't go for 110's on purpose...)
My new springs are (poweriSer) 90120 (approx 100 kg?), and I could bottom them out immediately, with ease..
...but I get good height