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What is the rationale behind it, though? I've tried it and it does nothing to make me sit without slouching :-/
by nkkollaw 8y ago
What is the rationale behind it, though? I've tried it and it does nothing to make me sit without slouching :-/
- pagutierrezn 8y agoI don't think that sitting straight all the time is desirable or even possible. I think that a ball makes you change your position so that you exercise (a little) all the muscles of your back. And for me this is a more interesting goal
- nkkollaw 8y agoAh, I see thanks.