Section I — Coach Water — Water as a Tool
This section covers Chapter 3, Lessons 3.1 through 3.4. This is the substrate integrator chapter — water as the medium every other modality runs in.
Part A — Vocabulary (20 points, 2 points each)
Select the best answer for each question.
1. Pre-exercise hydration is:
A) Drinking during the workout only B) Drinking enough in the hours before activity to start well-hydrated — pale-yellow urine is a useful check C) The same as post-exercise hydration D) Always 8 cups
2. During-exercise hydration (research-supported for most activities) is:
A) Chug as much as possible B) Drink to thirst plus a few sips at scheduled breaks; for longer or hotter activities, more frequent drinking and added sodium become useful C) Never drink during exercise D) Required by school
3. Post-exercise hydration includes:
A) Sleeping immediately B) Replenishing fluid and sodium with a normal meal plus drinking to thirst; for heavy sweating, milk, broth, or a sports drink can help retention C) Replacing only sugar D) Doing nothing
4. Mild dehydration is:
A) Severe medical condition B) About 1-3% body water loss — measurable cognitive effects (attention, working memory, mood) often appear at these levels, sometimes without obvious thirst C) Always over 10% D) The same as overhydration
5. Voluntary dehydration is:
A) Choosing to be dehydrated on purpose B) The pattern in school environments where students drink less than needed because of schedule, access, and habit — not a deliberate choice C) A medical disease D) The same as fasting
6. Nocturia is:
A) Sleeping deeply B) Waking at night to urinate — disrupts sleep quality C) Required for hydration D) A type of dream
7. Nocturia tradeoff is:
A) Drinking nothing all day B) The balance between drinking enough during the day/evening to be hydrated overnight, but not so much in the last hour before bed that you wake up to urinate C) Always one way D) Required for adults
8. Microplastics are:
A) Macroscopic plastic items B) Very small plastic particles (under 5 mm, often microscopic) found in many environments including drinking water — research on health effects is incomplete C) A type of nutrient D) Always lethal
9. PFAS (per- and polyfluoroalkyl substances) are:
A) A type of vitamin B) Human-made chemicals used since the 1940s that persist in the environment for years to decades — sometimes called "forever chemicals"; real environmental health concern with EPA-regulated drinking-water limits C) Required for cooking D) Imaginary
10. The Elephant's substrate-integrator move is:
A) A swim trick B) The Coach Water G8 framing that water is the medium in which every other modality operates — cells, brain, muscle, breath, light receptors, food digestion all happen inside water C) A weight-loss philosophy D) A type of cold practice
Part B — Concept Comprehension (20 points, 2 points each)
Select the best answer for each question.
11. Body water loss starts to measurably affect cognition (attention, working memory, mood) at approximately:
A) 0.001% loss B) 1-2% loss C) 10% loss D) 50% loss
12. Voluntary dehydration in schools is common because:
A) Students enjoy it B) Limited bathroom access, limited drinking fountains, long stretches between breaks, and dry air all combine to make drinking enough harder than it should be C) Bodies have stopped needing water D) It is required
13. During long endurance exercise in heat, drinking only plain water without replacing sodium can cause:
A) Better hydration B) Exercise-associated hyponatremia — blood sodium falls dangerously, can cause headache, confusion, seizures, brain swelling, and in severe cases death (Almond et al. 2005, Boston Marathon) C) Faster running D) Improved cognition
14. Water timing around sleep involves:
A) Drinking nothing all day B) Drinking steadily across the day; a small glass with dinner is fine; avoid a flood in the last hour before bed; a glass of water on waking replaces overnight losses C) Drinking only at midnight D) Required to fast all day
15. Water works well as a medium for contrast therapy because:
A) Water repels minerals B) Water transfers heat about 25 times more efficiently than air at the same temperature — small temperature differences in water produce large physiological responses C) Water has very low specific heat capacity D) Water is the same temperature as your body always
16. Heinz Valtin's 2002 review concluded that:
A) The "8 × 8" rule has strong research support B) The specific "drink 8 glasses of water a day" rule does not have strong research support — daily water needs vary by body size, activity, climate, diet, and individual variation C) Drinking water is unimportant D) Bottled water is required
17. Current research on microplastics in drinking water:
A) Has clearly proven specific disease causation at typical exposure levels B) Has found them in both bottled and tap water; bottled water often contains more; health effects at typical exposure levels are still being studied — descriptive, not panic C) Says microplastics are imaginary D) Says all water is unsafe
18. PFAS are a real environmental health concern because:
A) They are always seen in school cafeteria food B) They persist in the environment, accumulate in living things, and have been associated in research with immune, thyroid, liver, and certain cancer effects at high exposure — the EPA has set very low federal drinking-water limits as evidence grows C) They have no measurable health effects D) They are imaginary
19. Clean municipal tap water in regulated US systems is:
A) Always dangerous B) Generally safe to drink — the result of generations of public-health work since John Snow; about 2 billion people worldwide still lack reliably clean water C) Less safe than every bottled water D) Universally available worldwide
20. Coach Water's main message at Grade 8 (the substrate integrator) is:
A) Water is just one tool among nine equal tools B) Every other modality in the Library takes place inside water — water is the medium of cells, brain chemistry, muscle contraction, breath exchange, food digestion, light reception, and temperature regulation C) Water is unimportant D) Drink as much as humanly possible always
Part C — Application (30 points, 6 points each)
Write 3-5 complete sentences for each question.
21. Describe what research has observed about mild dehydration and cognition. Why is voluntary dehydration in school a relevant pattern to address?
22. Safety recognition. A friend running their first long race in the heat plans to drink as much plain water as possible to "stay safe." Using hyponatremia and the Almond marathon study, explain why this plan is risky and what the better approach is.
23. Explain the nocturia tradeoff and the practical water-timing guidance around bedtime.
24. The chapter says water is the medium for contrast therapy. Use the words specific heat capacity and conductivity (or simply "heat transfer") in your answer to explain why water — rather than air — is the medium that makes contrast therapy work.
25. Explain the Elephant's substrate-integrator move in your own words. Pick at least three other Coaches' chapters and show how their content takes place inside water. (This is the explicit integration test of the substrate move.)
Continue to Section J — Synthesis Essay.