Two of the thingies you can poke in modding changes how strong joints are (in terms of power, not DM).
Obviously not something you can change on the fly, but if you wanted to make weaker toris that don't jump from lifting their arms it's totally possible.
Make a new mod & change the strength & velocity of the joints, though you might want to poke the weight of the body parts too in order to compensate for it or you could end up being unable to stand up.