When I started training clients, I thought I knew it all, and I would strut around the gym floor like a peacock, willing to assert my superior gym knowledge. When in fact, looking back, I knew absolutely nothing.
This attitude hurt more than helped me, and this was the first of many mistakes I made at the beginning of my career.
Read 5 Mistakes for New Trainers to Avoid at its original source Breaking Muscle:
https://breakingmuscle.com/fitness/5-mistakes-for-new-trainers-to-avoid