Minimum Daily Wrist Time to Keep Wound

I don’t think it’s the most realistic comparison but my IWC Perpetual has a 7 day power reserve and, with a desk job, it takes me around 2/3 days to get it fully wound while wearing. 

All but one of my automatics have hand winding, so I do a little wind in the evening for all of those. The one that doesn't I keep in a winder, so it is always ready. Since you used a Rolex tag on the post, all of those have a hand-winding option if that's the kind of watch you were wondering about. 

Depends on the watch.  My Oris Aquis Calibre 400 takes 5-6 very actively days to get fully would...which never happens.  If you don't wanna do that, 210 winds to get it fully wound.

My Seamaster 300...well, I pick that up in the morning, wind it enough to get it started.  Take it off at end of day and it runs for about 3 days before stopping.

All I know is that I don my Seiko 5 for the morning workout of light weights for about 20 minutes, and it almost keeps it running. I tend to wear it after work, where I'm very sedentary, just to bump it a bit. I've heard that a half hour walk should do it.  

If I had a power reserve indicator, I'd be doing experiments to find the most efficient motion for automatic winding.

Depends on the movement and complication. 30min walk will wind most watches close to decent power reserve. But all you need is manually crank it 10-20 turns before you rest it for the night. That said, on my UN with power reserve indicator, a whole day of wearing sitting at a desk typing only gets it PS to 75%.  

The main reason I am asking is that I have two chronographs with the ETA 7753 movement - an Omega and a Baume & Mercier.  I try to wind all of my watches daily (including the chronographs) but I think the manual winding is adversely affecting the ETA movements.  The watches work fine when I let them wind naturally but the manual winding makes the winding hard and the rotor spin when winding - as if the rotor and crown are connected.  Wearing for a couple hours makes all of that go away.  Of course, the watchmaker wants to rebuild it, but my Omega started doing it this past week and it has been rebuilt in the past year.  Idea is to wear them the minimal amount of time each day to keep them wound!

If hand-winding is the issue, you might consider a double-watch winder to keep both of them in. That way, they wind as if you were wearing them and not the crown. You can find them relatively cheap on Amazon. 

I'd guess two minutes of Seiko shuffle should be plenty for 24h.

I have always wound my automatics fully from dead stop before wearing them.

Haven't had and adverse effects yet and it's been a few decades.

I think it is the daily wind that affects them.  A Google search showed that I am not the first to experience this on the ETA chronograph movement.

I recall reading that 30 minutes of activity typically gives 4 hours of charge, although I suppose it would depend on calibre movement. It is also worth noting that the book in question was published some 30 years ago, and so that info could be out of date

Any long-term experience with this? Won't this damage the movement gradually?

Shaking your watch every day to fill it up isn't that much different than wearing it every day to fill it up.

I have no long time experience with doing this every day, I don't wind watches that I don't wear.

I do have an ETA VJ 7751 movement in my watch and sometimes when I know that I'm not gonna wear them 2-3 days I just put them on my wrist for about 60 to 90 minutes with activities such as when I'm cooking or playing PS and the watch keeps running even after 30 hours later. I checked on this several times. Sometimes I just manually wind it with about 7 to 10 spins and then I skip the wearing time. Could it be that yours have been over winded? Although I read somewhere that the 7750 family movements can't be over winded, but then again,what else would the watchmaker rebuild on that?