Positive pressure ventilation should be applied to the baby's airway through masks or other interfaces without the use of tracheal intubation because the baby is still very sensitive. This procedure is indicated for panting newborns because it is easy to apply and remove, preserves the upper airways, ensures greater comfort of the baby, avoids resistive work of the tracheal tube and the complications of intubation itself, such as upper airway trauma or nosocomial pneumonia.
You should not exercise in the cold because it's really bad for your bones, and you will get dehydrated and pass out if you're exercising in extreme heat.