They are to me. Ankle and wrist weights. And you need only the minimum weight (2 pound). They're also good for wearing during aerobic exercise. We have a number of us, in a step class, using wrist weights. I don't think you'd want ankle weights for aerobics --- could interfere with footing. I know they're out there, but at my age, I think I might have balance issue while doing aerobics.
It's amazing how such a small amount of weight makes you work harder.
"...Why is everyone a victim? Take personal responsibility for your life..."
As a fitness trainer I just need to add a warning about using ankle and wrist weights during classes, etc. If you already have had back or joint injuries you may need to consult with a doctor or trainer first. It is then impairitive that you use correct form and not overdo use.