(I am a new-comer in biology SE so sorry if violated any rules)

Effect of cold showers after intense training

I have read the answer to this question, but it seems there are discussions on the validity there so I am still confused. For me,

Benefits: increase heat loss by conduction on the skin surface, prevent heatstroke.

Disadvantages: thermoreceptors in the skin detect a drop in skin temperature, sending nerve impulses to the hypothalamus. Then the heat gain center is activated and causes vasoconstriction, reducing blood flow just under the skin hence reduce heat loss (&dangerous for patients with heart disease like the answer says). This also reduces sweat production by sweat glands.

Won't this 'chain' of physiological actions reduce heat loss (which is needed after exercise), hence trapping more heat inside the body instead of cooling in the long run? Or am I wrong when deducing the disadvantages?

  • $\begingroup$ You're right, It will reduce heat loss. $\endgroup$ – Ark Lomas Jul 18 '20 at 20:34
  • $\begingroup$ @ArkLomas OK thanks this means taking a warm shower can make the body return to normal core temperature even faster? $\endgroup$ – 234ff Jul 19 '20 at 1:46
  • 1
    $\begingroup$ not necessarily, your body has natural methods of cooling and heating itself to stabilize body temperature. If you have just done exercise, your body will naturally try to cool itself, taking a warm shower to make your body cool itself quicker (via vasodilation etc...) is less efficient than taking a cold shower. that said, drinking warm liquids also causes your body to sweat which can serve as a cooling mechanism to counteract the heat conducted from the liquid. but If your body is dangerously warm, a cool drink will probably be better especially if your sweat can't evaporate. $\endgroup$ – Ark Lomas Jul 19 '20 at 10:39

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