I walk around plugged into my iPhone, portability isn't the issue, perturbing my physical state is. If I have to pause to think to move around or have an alarm

I walk around plugged into my iPhone, portability isn't the issue, perturbing my physical state is. If I have to pause to think to move around or have an alarm that does this for me, I'm going to lose flow instantly. Edit: Point being, I've never been in a state of flow that lent me the presence of mind to be able to tell myself, "Time to get up and move around", and any attempts to do so would destroy it.