It is crucial that every individual man/women spends time in parasympathetic dominance. But perhaps the most demanding times are leading into winter (where are resistance to bugs needs to be top notch), in heavy training and high perceived stress periods and in peri-menopause and menopause, because these are predominantly times that invite the body to hang in survival mode. If we stay situated in this survival mode over extended periods of time, eventually disease ensues, exercise gains are difficult, hormonal benefits are lost, abdominal weight can creep up as the natural healing mechanisms of the body are not able to engage fully.