I've seen videos of people using dumbbells that are somewhat flexible in the middle. I've only seen ones that are 1, 2, 3 pds. Each time, they were used for upper body injury rehab.
Is there a name for these special dumbbells? Google is giving me results that are not at all what I am thinking of. I'd really want to see a youtube video to confirm I am buying what I want. I want very light weight that flexes in the middle for upper body rehab.
The premise is that these dumbbells need to be easy / safer to move when not in use. The user is injured / hobbled / old. So, minimal weight at both ends is ideal. Because the resistance generated by momentum is only there when you need it (while doing rehab exercises), and not there at any other time.
My best explanation:
Imagine a normal dumbbell. Increase the length by maybe 50%. Allow the middle to be semi-flexible. Doing normal dumbbell exercise with that will make the weight feel much heavier.