A stable and relaxed attention is very helpful for inquiry. It supports doing inquiry as meditation.
I can support stable attention through stability practices (samata) such as bringing attention to the breath.
I can support a stable and relaxed attention through exercise (aerobic, strength), yoga, tai chi/chi gong, Breema or TRE.
And I can support a stable and relaxed attention through my diet. For myself, I notice that staying away from sugar supports a stable attention (my attention goes a little, or sometimes a lot, haywire when I eat sugar). Dairy tends to bring a sense of sluggishness, and wheat makes me feel a bit “weird” so reducing or eliminating those is also a good support for inquiry, and for my life in general. When Byron Katie asks participants for The School to eliminate sugar for a week before The School, I suspect it’s partly for this reason, to support a more stable and relaxed attention, and partly so resistant thoughts will surface for inquiry.
Note: Some things I notice helps when the system is out of whack due to food. (a) Inquiry (can I be with what I am experiencing right now?) including The Work. (I should feel differently. I am tired. I can’t do what I want. My body feels off. My body feels off because…. My body feels off and that means that…) (b) Physical activity. (Walking, Breema, TRE, dance, strength etc.) (c) Food antidotes. (Ginger – fresh or in capsules – during or after each meal, drinking plenty of water, hot cocoa free from sugar, an apple, a good stew.)