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  2. Cold shock response - Wikipedia

    en.wikipedia.org/wiki/Cold_shock_response

    The cold water can cause heart attack due to severe vasoconstriction, [2] where the heart has to work harder to pump the same volume of blood throughout the arteries. For people with pre-existing cardiovascular disease , the additional workload can result in myocardial infarction and/or acute heart failure , which ultimately may lead to a ...

  3. Stressor - Wikipedia

    en.wikipedia.org/wiki/Stressor

    Traumatic events or any type of shock to the body can cause an acute stress response disorder (ASD). The extent to which one experiences ASD depends on the extent of the shock. If the shock was pushed past a certain extreme after a particular period in time ASD can develop into what is commonly known as Post-traumatic stress disorder (PTSD). [11]

  4. Shallow-water blackout - Wikipedia

    en.wikipedia.org/wiki/Shallow-water_blackout

    Blackout can occur during ascent from a deep freedive or immediately after surfacing. This is due to a relatively rapidly lowered oxygen partial pressure caused by a reduction in ambient pressure after much of the available arterial oxygen has been used up at the higher partial pressures induced by depth, leaving the diver in a state of latent hypoxia, with actual cerebral hypoxia inevitable ...

  5. Stress (biology) - Wikipedia

    en.wikipedia.org/wiki/Stress_(biology)

    A way to control stress is first dealing with what is causing the stress if it is something the individual has control over. Other methods to control stress and reduce it can be: to not procrastinate and leave tasks for the last minute, do things you like, exercise, do breathing routines, go out with friends, and take a break.

  6. Psychological stress - Wikipedia

    en.wikipedia.org/wiki/Psychological_stress

    Hans Selye defined stress as “the nonspecific (that is, common) result of any demand upon the body, be the effect mental or somatic.” [5] This includes the medical definition of stress as a physical demand and the colloquial definition of stress as a psychological demand. A stressor is inherently neutral meaning that the same stressor can ...

  7. Effects of stress on memory - Wikipedia

    en.wikipedia.org/wiki/Effects_of_stress_on_memory

    Acute stress can also affect a person's neural correlates which interfere with the memory formation. During a stressful time, a person's attention and emotional state may be affected, which could hinder the ability to focus while processing an image. Stress can also enhance the neural state of memory formation. [clarification needed] [29]

  8. Freediving blackout - Wikipedia

    en.wikipedia.org/wiki/Freediving_blackout

    Freediving blackout, breath-hold blackout, [1] or apnea blackout is a class of hypoxic blackout, a loss of consciousness caused by cerebral hypoxia towards the end of a breath-hold (freedive or dynamic apnea) dive, when the swimmer does not necessarily experience an urgent need to breathe and has no other obvious medical condition that might have caused it.

  9. Breathability - Wikipedia

    en.wikipedia.org/wiki/Breathability

    However, vapor water molecules are many times smaller than the liquid state and can pass through these “micro pores”. Chemical: Hydrophilic (water loving) / non-porous lamination or coating move moisture by chemical diffusion. The water molecule is positively charged and the hydrophilic PU is negatively charged, attracting the water through ...