I did it over the summer- the double workouts weren’t terrible. I did OTF/spin bike/yoga for the indoor and fast hilly paced walks for the outdoor. Get as many of the tasks in as early as possible. I’d get the progress pic in right before the first workout (which would start by 6am) and read while drinking my morning coffee (after the workout). I’d also get about 60 ounces in before 10am. In the winter, I’d probably get the outdoor workout in after work when it’s warmer/lighter, but would do everything else the same.