Summary Stress: adaptive response to situations that pose demands, constraints or opportunities. Homeostasis: low stress. Stressors challenge homeostasis: stress response. Return to homeostasis: recovery, return to low stress. Or inability to return to homeostasis: exhaustion, chronic stress. Stressors: wide variety.
Breathing: (“The Oxygen Advantage“) Exercise lowers oxygen (hypoxia) and increases CO2 (hypercapnia). Oxygen needs to supplied (by breathing in). CO2 needs to be removed (by breathing out). The level of CO2 in your body drives both the intake and uptake
Summary: Sauna helps to induce hypertrophy (increase in size of muscle cells). Oxidative stress (through exercise) is a source of protein degradation. Heat acclimation reduces protein degradation (and stimulates hypertrophy) through: Induction of heat shock proteins. Induction of growth hormones.