If they are flying locusts, look at the bottom cross section of the spring, where it pokes out of the hoof, if the numbers are the same they are the same springs, (unless some nut at the factory labelled the actual springs wrong), if not, yeh....

Aha, just checked them and they are indeed the same weight, so I have only my uneven-strength legs to blame

Hi guys, thanks for all your comments and help! I jumped a bit and ran on the spot while holding onto a door, so today I'm gonna go out and try to run/jump a little bit. Luckily they haven't made my legs ache at all yet, my arms are hurting from carrying the bloody box though!

The springs feel more even now and are losing their squeak.

Edit: I just went out for a little while and did some jumping from foot to foot which went fairly well, but when I try to switch to two-footed jumping the springs don't compress and I basically just slam down. I think I might be landing too far forward on my toes or something. Looking up some tutorials so I can try again later on.

Also had my first fall and spent ages trying to haul myself back up since I couldn't raise my leg high enough to swing one foot forwards! Finally managed it with the help of my mother and a fence...

After half a week's wait and a hellish journey carrying an unexpectedly large FlyJumper box on the tube, I finally got mine home and had a go on them. First impressions: "Oh god, they're massive! They looked a lot smaller in the videos!"

I went out in the park, wearing so much safety gear I looked a bit stupid, and was soon walking around on my own (without falling over!). It was all fine, except for me repeatedly bashing the knee bars together or tripping over myself and swearing loudly, but after a little while my legs got really tired - they weigh a bloody ton... (the 'risers, not my legs!) Of course after I took them off I wanted to put them back on again immediately

Anyway right now I can't run or jump (I have absolutely no clue how to even start jumping, since if I bend my legs I fall over and if I try to jump I can't even lift my feet up), and one of the springs feels 'springier' than the other one. Still, for a massively unfit, 7 stone girl I think I've done okay for about an hour's practice... and much better than my sister, who put them on, shrieked, and fell over into the flyjumper box.

No problem 

Where abouts are you from, there may be some people or groups local to you?

I am in London (on the central line!) so I'm guessing there will be quite a few groups to meet up with who can show me how to powerise properly, heh.

Oh okay, so it's fine as it is? The instruction manual somehow made it sound like you could actually do something with it... Thanks for replying so fast

This is a really idiotic question, but I have read the instructions that came with my flyjumpers (adult model, 60kg) and I don't understand the strange chinese translations, heh.

When I put them on without any adjustment, the knee bar and pad at the back (that would be touching my calf) are not right at all - my leg is not in contact with the pad. I can make the knee bar go up and down, but that doesn't really help. I'm hoping you can actually adjust this and I don't have to do it the hard way and gain a lot of weight! Or does it not matter if your leg is in contact with it or not?

Sorry, I feel like a right thicko, but I don't know how to do this mechanical stuff 

(sorry if this question has been asked already; I tried a search and turned up nothing v v)

Some friends and I are really interested in powerisers/flyjumpers/etc, but we want to try them out rather than dropping £200 straight off. Are there any places where you can try or rent them in London?

Also, I am 17 and have weighed between 40 and 45kg for years. Do I have to get kids models or are there brands which have adult models for low weights?

Thanks