Comment by timbit42

Another great option is rebounding. Every time you land, every muscle in your body is exercised. It's also easy on the joints and you can do it inside if the weather is bad.

Back in the 1970's, NASA studied rebounding as a way to help astronauts recover after being in space. They found 10 minutes of rebounding to be equivalent to 30 minutes of jogging[1].

It's also good for the elderly and disabled because you can sit to do it or even someone else can bounce you and you will still benefit from it.

My dad is 81 and is still rebounding. His core is strong and he can move around like when he was in his 60's.

Older rebounders used metal springs and were harder on the joints. Newer rebounders use bungees for a softer, gentler and silent landing. Some people rebound while their partner sleeps a few feet away.

[1] https://www.tomsguide.com/wellness/fitness/forget-running-na...