As much as I would love to jog for fitness I can't do it anymore. Since my son was born I can't handle any exercise that has impact. I'm sure other women know what I'm talking about.
I've had a Rebounder for several months and it works perfectly for me and my body.
Jumping on the mini-trampoline is remarkably un-strenuous on the joints. There's no solid ground to suddenly stop the bouncing of your feet. Your movements are perfectly safe, and they make the effect of gravity beneficial. By working against constant gravitational pressure while bouncing, you resist the Earth's pull. Your resistance is subtle, but it builds cellular strength. Rebounding's alternating weightlessness and doublegravity produce a pumping action which pulls out waste products from the cells and forces into them, oxygen and nutrition from the bloodstream.
Rebounding aerobics is working with gravity to cleanse your tissue cells and act as an oxygenator, which, in turn, lightens the load on the heart. Also it's fun to bounce! Much more than fun, however, rebounding provides a number of physiological pick-me-ups for the person who sustains this activity for at least ten minutes, four times a day, or for a single daily session for 40 minutes. As you bounce, your feet hit the mat with twice the force of gravity. Then just as the astronauts experience while floating in space, your body is in a state of weightlessness at the top of the bounce.