Interesting connection to apply flow to this issue and point out drawbacks from not reckoning with the things not focused on. Mihaly Csikszentmihalyi wrote abou

Interesting connection to apply flow to this issue and point out drawbacks from not reckoning with the things not focused on. Mihaly Csikszentmihalyi wrote about applying flow to much more than one’s main skill, such as personal relationships and free time. The back burner should be maintained using the primary skill of achieving flow state. Sertillanges is another writer who wrote about setting the stage for focused work, and for him maintaining health in basic life areas (diet, exercise, spiritual exercise) was a given to support the main work.