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Re: Sauna for Zone 2 [Bonmaklad]
As I understand it, one of the primary purposes of low intensity training is to increase mitochondria density. That's stimulated by muscles providing a demand for energy. To produce energy for the muscles aerobically, you need oxygen. That comes from your lungs via your blood to your muscles. Higher demand = higher heart rate. Increased heart rate during exercise is a result of muscle demand for energy. Increase in mitochondrial density is also stimulated as a result of muscle demand for energy. Heart rate does not stimulate mitochondrial growth. Heart rate raises for many reasons as myself and others have already mentioned (heat, cold, stress, drugs, etc...) and it is not in itself "training".

I'm by no means an expert. I think the above is a reasonably accurate simplified overview, but please don't hesitate to correct me if I've gone astray!

ETA:
I meant to also mention capillary density and then forgot. In addition to increasing mitochondrial density, I think aerobic base training is also intended to increase capillary density and function, which IMO is again unlikely to be stimulated by simply elevating your HR via sauna. Although I imagine it's more feasible that capillaries could be effected than mitochondria, perhaps they're also stimulated by need for cooling and recovery as well as oxygen delivery. As before, I'm more than happy to be corrected!
Last edited by: Ai_1: May 15, 19 8:40

Edit Log:

  • Post edited by Ai_1 (Dawson Saddle) on May 15, 19 8:31
  • Post edited by Ai_1 (Dawson Saddle) on May 15, 19 8:40