How about looking for a day job that has a quality gym in the building where you can workout and shower during the day?
I'm sure you can find this in SF tech. During your interview process, just make it clear that you value being able to exercise during the day.
It doesn't have to be crazy stuff, even just walking on a treadmill, running, or stretching. It's more important to build the habit of doing anything than doing something crazy.
There is strong evidence that exercise improves learning and memory (personally I feel it improves focus as well) so in my opinion, you don't "lose" this time as you are more effective the rest of the day [0]