For the general population, I don’t recommend the use of ankle or hands weights during cardio activities. remember the goal should be either cardio or resistance. If a client doesn’t perform proper exercise technique and body alignment, I wouldn’t give the client more weight for any exercise.
Maybe for certain athletes, maybe it can be used for enhancing some performance. Will there be significant increases in performance? Not enough research. I’m more concern with the benefit/risk ratio.
Who are the majority of our clients? Athletes? probably not. More so general and special population.
As an AFAA Certification Consultant/Examiner
My advise…DON”T USE THEM FOR CARDIO.
USE WEIGHTS FOR RESISTANCE TRAININGS.