Originally Posted by thenrie
As for conditioning, as long as you are not doing something like Steeple Chase, he should be getting back up to speed within two or three days. Start a little slow, just to allow him to get focused again and allow him to get back into the swing of things, but I'd be working full-speed by the third day (if your "moderate intensity work" is similar to mine).
I have to disagree with this. It takes much more than a few days to get a horse in shape after a layoff. Think about it this way--If you're used to running a moderate amount daily, let's say 8 miles, you can't take off for a month and expect to be running eight miles again within 2-3 days. You have to condition not only your muscles, but your joints and cardio health.
To bring a horse back to "moderate work", I would expect several weeks of gradual work to bring him back up to speed.