Almost everyone I knew who broke a bone growing up broke them on a trampoline. As an adult, every story I've heard involving someone's kids and a trampoline ended up involving a cast at best.

... And yet. I wonder. I can remember the feeling of freedom and joy in my body as a child, joy in movement itself that I have never recaptured in any meaningful way no matter how I ever tried to motivate myself to exercise...

Swimming is also dangerous, but is considered a very healthy and useful activity and skill. I could see a similar cost/benefit analysis for trampolines and other gymnastic equipment.

Backyard trampolines without nets are particularly dangerous. A gymnasium or trampoline park with in-ground trampolines are my go-to if someone wants to learn how to do tricks.

Have you tried lifting weights? That freedom of movement is what it feels like to have a higher strength-to-weight ratio.

You can get there surprisingly quickly and casually if you haven't lifted weights in a long time or ever.