I also hear that resistance bands as gimicky as they sound, they can be helpful especially for the elderly who have lost mobility, physical therapists on YouTube will say things like: elderly people who cannot go up or down the stairs after using resistance bands find they've regained mobility.
So don't ever sleep on exercise, my biggest take away is you don't need to be a super weight lifter or whatever, you just need to do enough every week that it keeps your body going.
I'm 43 and do mostly stretchy band exercises for upper body workouts to help my neck, shoulder, and arms where I have chronic pain. Takes up very little space, I can do 5-10 minutes throughout the day, and 20 minutes after doing a few sets my pain is much better.
You can actually build some muscle this way - nothing impressive, but way more than I had when I wasn't doing any upper body work.
You have me a good idea. My granny can barely walk. She recently started getting constant alarms on her apple watch about Atrial fibrillation - poor cardiovascular shape.
Excruciating exercising with resistance bands is something she could do too - already started her on doing simple biceps exercises with small weights.
So don't ever sleep on exercise, my biggest take away is you don't need to be a super weight lifter or whatever, you just need to do enough every week that it keeps your body going.