I got a rebounder at Good Will for $5 a few years ago. I put it in the closet and forgot about it, but then brought it out recently and started using it because I felt congestion in my armpit lymphs and breast tenderness. I spend about 10 minutes a day on the rebounder bouncing and waving my arms up and down. (see youtube videos for how to do this). Definitely helping my issues. Also drinking more water throughout the day to flush the lymphs.