At our school, we spar twice a week. But, we do not use knees and elbows, so the free sparring that we do isn't really Muay Thai. We only work our knee and elbow techniques on the thai pads and heavy bag. Our free sparring is really international rules kickboxing. According to my instructor, we will begin using knees and elbows after a minimum of 3 years of continuous training. Currently, I am the 'senior student' and I only have 9 months of training.
Brian Twitty