Abba S: Sorry for not clarifying, but I wasn’t talking about students when I asked about treadmill/desk combos, just your average white collar/office job.
And the shtender question is more historical, but basically applicable to anyone learning Torah. I wasn’t davka thinking of kids, but I wouldn’t be surprised if kids that can’t sit still actually preferred it, at least for part of the day. The same can probably be said for many adults that spend extended hours over their Gemara.
Even for someone sitting at his office desk all day and attending a shiur in the morning or evening, it may be preferable and keep him more alert. It’s just a thought and I’m throwing it out there for anyone with experience to chime in.