hi..thus so far all my 3 kids used walker..the first one is already 16yrs old..and have no problem walking,running etc. she's even in track n field.lol.. jumperoo is quite recent but personally for me ,walker still works as long as you monitor and guide properly. then again,it's only based on my personal experience and opinion.🙂✌️
My children used walker when they were young and have no issue with their leg muscles. It depends on your usage. My children only used it for a few mths until they started to stand & walk.