Outdoor rehearsal in August pushes fluid losses through sweat well above the indoor baseline. The stone plan's working target — about 2.5 liters of urine a day — gets harder to reach, because more of the fluid is leaving through the skin. The measured response is the same as every heat-exposure plan: water before rehearsal, a bottle at the break, and water after the field session, with the schedule doing the remembering that thirst alone cannot. The pale-urine check at the end of the day is the field-day version of the plan's daily signal.
Long rehearsal in the heat raises the electrolyte question, and the stone-table answer is measured: water is the base, and the sports drink is fine in moderation during extended exertion — it measures near-zero oxalate and replaces sodium and potassium lost in sweat. The caveat is the sugar column: the sports drink carries sugar, and the UK Biobank data linking daily sugary drinks to higher stone risk is the line that matters. For most band members, water plus the salty snack at the break covers the electrolytes without making the sugary drink a daily habit.
Band camp runs long, and the snack break is where the measured plan lives. The field-friendly snack is the same formula as every meal — protein, grain, produce — packed for the duffel: the cheese stick and fruit, the granola bar, the crackers and pretzels, the water bottle that never leaves the field bag. The items to portion are the nut-heavy trail mix and the candy-and-soda combo from the concession stand; the items to keep are the plain snacks and the dairy.
The table below shows the measured oxalate values of the common band-camp snacks and drinks.
| Food | Oxalate (mg) | Serving | Rating |
|---|---|---|---|
| Water | 0 | 1 cup | Safe |
| Sports drink | 1 | 12 oz | Safe |
| Cheese stick | 1 | 1 oz | Safe |
| Milk, whole or low-fat | 0 | 1 cup | Safe |
| Granola bar | 6 | 1 bar | Safe |
| Crackers | 2 | 1 serving | Safe |
| Pretzels | 1 | 1 serving | Safe |
| Apple, fresh | 2 | 1 medium | Safe |
| Banana | 6 | 1 medium | Safe |
| Orange, fresh | 1 | 1 medium | Safe |
| Trail mix with nuts | 20-36 | 1/4 cup | Caution |
| Peanut butter | 36 | 2 Tbsp | Caution |
| Soda, cola-type | 1 | 12 oz | Safe |
| Candy bar | 5-10 | 1 bar | Safe |
| Ice cream | 0 | 1/2 cup | Safe |
The heavy uniform makes the hydration question harder in a specific way: the bathroom trip is a production, so students defer it, and deferred urination concentrates the urine — the opposite of what the stone plan wants. The measured answer is scheduling: a water bottle with a known volume, a refill at every break, and the bathroom stop built into the break routine rather than left to urgency. The plan works when the structure does the remembering.
Competition day raises the stakes on the same structure. The measured version of the game-day plan starts the night before — a full bottle before the bus, water on the schedule through the warm-up, and the pre-game snack kept to the plain items (the granola bar, the banana, the water) rather than the concession-stand candy-and-soda combo. The nerves of competition suppress thirst, which is exactly when the schedule matters most; the director or the section leader who builds the water break into the timeline is running the stone plan for the whole section. After the performance, the refill and the dairy snack close the day the way every practice day closes it.
Aim for the standard stone target — about 2.5 liters of urine a day, which means roughly 3 liters of total fluid for most people, and more on hot rehearsal days. Water before, during, and after the field session, with refills at every break.
Yes, in moderation — they measure near-zero oxalate and replace electrolytes lost in sweat. Keep the sugary version for extended exertion rather than the daily habit, and water as the base.
Cheese sticks, granola bars, crackers, pretzels, and fruit — protein plus grain plus produce, sized for the duffel. Portion the trail mix and peanut butter, and keep water as the field drink.
See how oxalate values are measured and verified on our data methodology page.