Weighted weight bar with variable weight. What do you need ?

We have already created a first interaction which allowed us to validate our future model which will be released in 2022. An adjustable weight bar from 4 to 10KG.
However after the first interaction we noticed that you also want a heavier bar.
So now we would like to know more about it.
Are you used to working out with weights, bars or other weights?
So do not hesitate to answer our questionnaire to share your habits with us, tell us what you think of the adjustable bar and tell us how you would like to be supported in the use of the product.