I'm 83 years young and have studied and been a "rebounder " for over thirty years. My first rebounder had a lifetime guarantee and I gave it to my granddaughter a few years ago, after buying my first bellicon trampoline..
I am convinced from all I've read that it is the best, safest and most effective form of exercise for all ages.
My routine is to bounce @ 20-30 minutes a day, with 4 # hand weights in each hand, while doing a a light form of calisthenics . It relieves the aches and pains, improves balance, flexibility.
We recently bought a beach home and purchased a second bellicon for use there.
Do your research and learn about the many unique health benefits of "rebounding".