Originally Posted by momtosimon
I think, if you limit his time in it, he will be fine. How much his his spine going to develop in ten minutes?
I respectfully diasagree. It's not that it will hinder spinal development -- it's that it can cause injury to the spine, because baby's spine IS still developing, and the base isn't strong enough to bear the full weight of baby's body -- nor is it meant to.
And it is my understanding there is no way of knowing how quickly the damage could occur. And it's not just the sitting in that position with weight on the spinal base, it's the jumping motion can lend itself to even more damage. Does that make sense? I feel like I'm not explaining myself very well here. Hopefully some other mama can give a clearer explanation.
I guess the bottom line for me is I'm a fan of some things in moderation, but risking back problems for life isn't one I'm willing to mess around with. (And FWIW, I've also heard of those things causing damage to little boy's scrotum area, so if my child were a boy, I'd be even less inclined to consider using something like that.)
That's just me though. I understand other mamas may not share my concern (just like some other mamas think it's okay to feed solids before 6 months or whatever). It's a personal decision, but one I definitely would say no to.