In-article:

Merciless training – Carinthian soldiers first Austrian US rangers

Physical and mental fitness was checked at the Army Sports Center, tasks such as swimming in full gear were practiced and preparation was made for specialties of the US training, such as sleep and food deprivation before exertion. One of the exercises was to eat a salad, then not eat anything for 24 hours and then to walk 30 kilometers. See how the body works on reserve. “If you only notice that over there, it’s too late,” Valtiner knows.

source site-12