When in fear, does screaming release endorphins ?
I have recently read in a book about love that screaming when in a fearful situation can release endorphins and help us cope with the daunting situation. I have read that skydiving instructors suggest screaming to the people who dive for the first time. Does screaming in this situation relieve the stress created from risk of death ?
Temperature ranges for deliberate cold (water) exposure
Most of the studies I have seen on cold water exposure have people sitting up to their neck in water that's in the 50 - 60 degree (F) range. I generally spend about 5 minutes in a cold plunge that is just above freezing (32F - 34F). Should I expect the benefits shown in the studies with warmer water to be the same? Are they likely to be greater or achieved in a shorter time? I generally use the cold plunge 4 - 5 times per week