Section F — Coach Hot — Heat Physiology
This section covers the Associates chapter on Heat Physiology, Lessons 1 through 5: Thermoregulation and Heat Physiology, Heat Acclimation and Adaptation, Sauna Research and Cardiovascular Effects, Heat for Recovery/Performance/Contrast Therapy, and Heat and the Other Coaches. All material is already in the chapter — no new content.
Part A — Vocabulary (20 points, 2 points each)
Select the single best answer for each question.
1. Cutaneous vasodilation (in heat response) is:
A) Vasoconstriction of skin vessels B) Active dilation of cutaneous arterioles, mediated principally by acetylcholine release from sympathetic cholinergic fibers innervating eccrine sweat glands and via co-released vasoactive peptides; the principal heat-dissipation mechanism via increased skin blood flow C) Closure of all skin vessels D) Reduction in blood pressure only
2. Eccrine sweat gland is:
A) The principal apocrine gland B) The principal sweat gland in humans (2-4 million across body surface), innervated by sympathetic cholinergic fibers — a notable exception to the general norepinephrine-releasing pattern of sympathetic postganglionic neurons; produces thermoregulatory sweat C) Restricted to palms only D) An adrenal structure
3. Latent heat of vaporization (relevant to sweating) is:
A) The energy required to raise water temperature B) The energy required to convert liquid water to vapor without temperature change; approximately 580 cal/g at body temperature — the physical basis for sweat's cooling capacity C) The same as specific heat D) Energy of melting ice
4. Exertional heat stroke (EHS) is:
A) Mild heat illness B) A life-threatening clinical condition defined by elevated core temperature (typically >40°C / >104°F) plus CNS dysfunction (confusion, ataxia, seizure, coma) developing during heavy exertion in heat; requires immediate aggressive cooling C) The same as heat exhaustion D) A condition limited to professional athletes
5. Cool-First-Transport-Second is:
A) The principle of waiting for paramedics B) The clinical principle for exertional heat stroke management — initiate aggressive cooling (ideally cold-water immersion) at the field/site before EMS transport, because survival correlates with how quickly core temperature falls toward 39°C C) Transport before cooling D) An obsolete approach
6. Heat acclimation refers to:
A) Wearing more clothes in heat B) The series of physiological adaptations over ~7-14 days of repeated heat exposure with concurrent exercise: earlier sweating onset, reduced sweat sodium, plasma volume expansion, reduced cardiovascular strain at the same workload C) Permanent loss of cold tolerance D) A single-session adaptation
7. Plasma volume expansion (heat acclimation adaptation) is:
A) Vasoconstriction B) An increase in circulating plasma volume (typically 10-20%) over days of heat exposure; the most consequential single adaptation, supporting cardiovascular function and thermoregulation under heat load C) Reduction in blood volume D) Edema in tissues
8. Heat Shock Proteins (HSPs) are:
A) Inflammatory cytokines B) A family of molecular chaperones induced by heat stress (also by other stressors); assist protein folding and protect cellular function under stress conditions; HSP70 and HSP90 are the most studied isoforms in heat adaptation C) Membrane lipids D) The same as immunoglobulins
9. Eisalo 1956 is:
A) An obsolete paper B) The foundational Finnish sauna research from the 1950s — historical anchor for the chapter — initiating the modern scientific study of sauna effects on cardiovascular physiology C) A paper on cold exposure D) A study of breathing rhythm
10. Contrast therapy is:
A) The same as cold-water immersion B) Alternating exposure to hot and cold (typically hot water immersion or sauna followed by cold-water immersion, often in 3-5 cycles); the natural payoff to the Cold-Hot pairing, with research support principally for perceived recovery and acute autonomic engagement C) A theoretical concept D) Only used in clinical hydrotherapy
Part B — Concept Comprehension (20 points, 2 points each)
Select the single best answer for each question.
11. Sweat composition varies in that:
A) Sweat is always isotonic B) Initial sweat is essentially isotonic plasma filtrate; as it passes through the duct, sodium and chloride are reabsorbed in proportion to flow rate, producing markedly hypotonic sweat at low rates and progressively less hypotonic sweat at high rates — with substantial individual variation (10-80+ mmol/L typical range) C) Sweat sodium is constant across individuals D) Sweat has no electrolyte content
12. Exertional heat stroke mortality correlates with:
A) Patient age only B) Time to effective cooling — survival is substantially better when core temperature is reduced toward 39°C within 30 minutes of recognition (the "cool first, transport second" principle); delayed cooling produces worse outcomes regardless of subsequent treatment C) Hospital distance only D) Pre-existing fitness alone
13. The Laukkanen Kuopio cohort findings (multiple papers, 2015+) demonstrated:
A) Sauna use definitively causes cardiovascular improvement B) Observational associations between regular sauna use (frequency, duration per session) and reduced cardiovascular event rates, lower all-cause mortality, and reduced dementia incidence in a large Finnish middle-aged male cohort; associations are biologically plausible but cannot establish causation given observational design C) Sauna use is harmful D) Sauna has no documented effects
14. Sauna-related sudden cardiac death is:
A) Common in young healthy adults B) Real but rare, occurring predominantly in middle-aged adults with undiagnosed coronary artery disease and in contexts combining sauna with substantial alcohol use; not a reason to avoid sauna in healthy adults with medical clearance but a reason for caution in high-risk populations C) Has never been documented D) Affects only women
15. Heat acclimation's cardiovascular effects include:
A) Reduced cardiac output during exercise in heat B) Reduced heart rate at the same workload, reduced perceived exertion, reduced core temperature at the same workload, and the plasma volume expansion that underlies these improvements; performance benefits are most pronounced for events in heat C) Cardiovascular damage D) No measurable changes
16. The chapter's treatment of "sauna for fat loss" is:
A) Endorsement B) Explicit rejection — sauna-induced weight reduction is principally water loss through sweat that is restored upon rehydration; the framing distorts the underlying physiology and produces eating-disorder-adjacent risk patterns particularly in weight-class athletes C) Conditional endorsement D) Not addressed
17. Contrast therapy's mechanism debate involves:
A) Settled understanding B) Active debate between vasomotor pumping (alternating vasodilation-vasoconstriction enhancing peripheral circulation and lymphatic return) and neural/anti-inflammatory mechanisms (autonomic engagement, central perceptual effects, modulation of inflammatory signaling); both contributions plausible, neither fully established as dominant C) No mechanism proposed D) Only the placebo effect
18. The Hot Associates integrator position — adaptive load — describes heat as:
A) The same as Cold's system probe B) Sustained stress that builds adaptive capacity over weeks; distinguished from Cold's system probe (acute reveals) by the chronic-vs-acute timeframe and the building (rather than revealing) function — heat acclimation produces measurable plasma volume expansion, sweat sodium reduction, HSP elevation, and cardiovascular adaptation that persist as expanded capacity C) An obsolete framing D) Equivalent to active output
19. Combining sauna with substantial alcohol intake:
A) Is safe B) Is identified as a high-risk combination — alcohol-induced vasodilation compounds heat-induced vasodilation, alcohol impairs cardiovascular and thermoregulatory function, and the combination produces substantial dehydration; the Finnish tradition of sauna explicitly separates alcohol from active sauna use C) Enhances cardiovascular benefits D) Has no documented risks
20. Heat practices in adolescents and young adults:
A) Should follow adult protocols B) Require additional caution including more conservative durations, supervision, hydration support, and recognition that heat acclimation protocols developed in adult elite athletes may not translate directly; the chapter is descriptive of adult research and does not prescribe adolescent protocols C) Are universally contraindicated D) Have no special considerations
Part C — Application (30 points, 6 points each)
Write 3-5 complete sentences for each question.
21. Describe the Eisalo 1956 paper and the Laukkanen Kuopio cohort tradition. Why does the chapter call Eisalo the historical anchor, and what is the appropriate framing of the Kuopio observational findings — what they support and what they cannot establish?
22. Safety recognition. A 19-year-old collegiate distance runner collapses at mile 22 of a marathon on a 91°F humid day. He is confused, ataxic, and rectal temperature is 41.2°C. Walk through what the chapter teaches about exertional heat stroke recognition, the cool-first-transport-second principle, and why field cooling speed correlates with survival.
23. Describe heat acclimation over 7-14 days, focusing on plasma volume expansion as the central adaptation. Explain why this single adaptation has cardiovascular, thermoregulatory, and performance consequences across all exercise in heat.
24. Apply the Hot Associates integrator position — adaptive load — to distinguish it from Cold's system probe. Why are these two positions structurally distinct, what biology grounds the distinction, and what does the acute-vs-sustained timeframe difference imply about how cold and heat are taught in this curriculum?
25. Cross-reference Cold Associates Lesson 4 (Roberts 2015 CWI-attenuates-hypertrophy finding) and Hot Associates Lesson 4 (contrast therapy). What does the Roberts caveat imply about contrast therapy timing for athletes in hypertrophy-focused training blocks, and what does the chapter recommend for the integrated cold-hot question?
Continue to Section G — Coach Breath.