Yeah sorry, there is no other window.
I'm a nightowl too, so the early morning is not an option.
My sleep is definitely disrupted if I do it 2 hours before bed, but I haven't noticed issues with 4.
My fox said I had to get in better shape or I might get hurt. Started going to Crunch and doing some functional training and heavy lifting but Crunch is about as bad as the gym at my Uni when it comes to college students inhabiting the weight machines for too long. Fox said I didn't need more muscle mass but had to improve functional flexibility and get BMI down (ever see a fat fox?)
So I got a 35 lb kettlebell and a TRX system and do those things as well as VR workouts (some Beat Saber, might get back into Supernatural when I've exhausted the free trials of everyone else) around 8-9pm many nights, I usually got to bed around 10-11pm and sleep well. I think going for a hike is fine even as late as 9pm but I wouldn't want to be doing cardio or HIIT that late. Now that I think about it I oughta add some active isolated stretching with the bands.
So far as my fox is concerned [1] I know it puts a lot of stress on my hindquarters (wants to be pronograde?) and to express itself wants to use a range of postures and motion wider than I find comfortable. If I have to explain it to people who might be skeptical I just lie and say I am preparing for character acting in community theater.
Unfortunately I have kids school age, so I'm forced to go to bed by 11pm. During spring break it was pretty evident though, if I go to bed at 1 or 2 am and wake up at 11 am, I feel way more rested than if I go to bed at 10:45pm and wake up at 7:45am. Society really doesn't accommodate that
