I work out 4x a week...

Ideally, 6 days per week, 1-1.5 hours per day (not counting yoga time, that would bump it to 1.5-2 hrs.) I run, strength train, stationary bike, elliptical, yoga. I shoot for 3 days of running, based on mileage rather than time. I take the other three days for strength training, 45-60 mins, followed by 30 mins or so on the bike or elliptical. I like kickboxing, something it is my strength and cardio instead of weights. I target 20-30 mins of yoga every single day, in the morning when I first get up. Day 7 is a lighter, more restorative flow
compared to power yoga the other days.

I exercise a lot more now than during weigh loss, actually. I find I don't feel good without the exercise.

It varies seasonally for me. In general I work out more now than I did when I was losing, but it's a lot easier to do more workouts since my body is used to it. When I was losing I worked out 3x/week for about 30-45 minutes. At the moment I'm working out 6 days a week for 60-90 minutes, but I have a triathlon coming up in under two weeks that I'm training for. Over the winter I usually end up scaling back to 3-5x/week for 30-60 minutes, and some weeks I only get in 2 workouts.

If your body doesn't want to work out more than 3 days in a row, then don't! There is no rule that you have to exercise a certain amount or you'll gain weight. It is all about calories in vs calories out, so you can modify either side of that equation to maintain equilibrium.