Twelve hour days, no fixed breaks, and catering that arrives whenever it arrives.
Tech is the worst-fed week of any production. The days are long, the breaks are unpredictable, the room is hot, and caffeine quietly replaces meals. It is also the week with the highest injury and vocal risk, which makes the gap between demand and fuel more consequential than at any other point.
You cannot control the schedule in tech week. You can control what is in your bag, and that turns out to be most of what matters.
Breaks are called when they are called. Catering is variable. Costume changes and heat increase fluid loss significantly, and dehydration under stage lighting is routine and largely unnoticed until concentration drops or the voice tires early.
The failure pattern is predictable: skip breakfast, coffee at ten, nothing until an unpredictable late lunch, then a large meal at eleven at night. Repeat for two weeks.
Assume there will be no break when you expect one. Anything that survives several hours in a bag and can be eaten in two minutes standing in the wings is worth more this week than anything requiring a table.
Tech week is short and unusual, and it is worth treating as a temporary state rather than a new normal. If the pattern of skipping food and running on caffeine persists into the run, that is worth attention.
Nutrition here is framed around energy, focus and recovery. If food feels like something you are managing rather than using, that is worth a conversation with a nutritionist who understands performers.