5 - 6 HIIT / Strength / Spinning classes a week, mostly HIIT. I do it at 6 am each day, meaning I'm up c540. I'm addicted to it, meaning I sometimes make poor choices eg I'm sleeping badly at the moment so I have at times been awake most of the night & still got up & done a class.
I never really enjoyed walking, preferring running. I run too, tho am recovering from an injury so I'm only doing short runs. However, one lockdown benefit is that I got to love walks, and have discovered the great beaches / woodland / hill walks close to me that I had basically ignored for years. I find mentally I get the most benefit from being outdoors and walking for a few hours.
I'm quite fit, I push myself a lot in my training & I like how I feel, and how my body looks.
For me it's really important for managing anxiety and worry.
However, I've an unhealthy attitude at times - I train even when tired or under the weather & I can't cope if I'm not able to exercise. I'm aware it's not healthy in that sense. I'm also very tired as I'm up so early & on the go all day with work / kids, but don't get enough sleep and this is also not good.
So for me there are undoubted benefits but also challenges.