Re: Freestyle wrestling ?
It's pretty tough physically. Especially at beginning levels(no wrestling background) it's a lot of scrambling. Your whole body works at anaerobic(printing) pace.
Wrestled in High School but never took it seriously. It will heavily depend on your age, how quickly you pick things up and mostly willingness to pursue it. Coach will play major role too, obviously. Teaching only techniques, is not the way to go. My coaches explained concepts to me. For instance, they made me understand how to control my center of gravity to stay on top or get under the opponents center of gravity and take him down/throw him.