@CalamityJane,
Yikes! Be careful on things that can roll out from underneath you!
I used a ball for bouncing at a holistic center I visited with a friend this spring. They started each day with 20 mins of bouncing and flailing/thumping. The first day he asked if anyone had a bad back (me and one other person). He had us use balls instead of the rebounders.
jw - we get injured more easily as we age.
Tennis isn't something I could ever play well. No hand-eye coordination.
RH - do you have pompoms? Cheerleaders should have pompoms.
ehbeth - glad you like the marching/bouncing. It seems to do a good job of getting things warmed up and the blood flowing. I hope you had fun at the swap meet.
I just got back from my second tour around the block. My pace is picking up a bit and I'm now comfortably completing 0.6 miles in just over 10 mins (about a 3.4 mph pace).